This article will be useful for Nikon Digital SLR owners. Automatic ISO sensitivity control is a very interesting thing, I’ll even say that this is one of the key things in modern Nikon digital SLR cameras. If you understand how automatic ISO sensitivity control works, you can simplify your work very much with a camera and pay more attention to other key points when photographing. It is very strange, but I have never seen a detailed explanation of how automatic ISO sensitivity control works.
How Automatic ISO Sensitivity Control Works on Nikon Cameras
In order not to write the phrase 'Automatic ISO sensitivity control' for a long time, I use a shorter and more understandable expression Auto ISO (in Russian it reads as 'auto iso'). This function can be found in the camera menu under the 'ISO Sensitivity Options' setting. Each Nikon camera hides Auto ISO differently.
The essence of Auto ISO is very simple. The camera itself selects the desired ISO sensitivity for the correct exposure.
In the 'Auto ISO' setting menu, set maximum ISO и maximum excerpt... The 'Auto ISO' function can be either enabled or disabled. Please note that on the CZK, automatic ISO control on cameras occurs only in modes P, A, S, M. In the future, I will write about the work of Auto ISO in these modes.
The maximum ISO value makes it clear to the camera that you cannot set the ISO above this value. Often the maximum ISO value is called the threshold, which can not step over the camera automation. For example, if you set the maximum value to ISO 3200 (the ISO threshold is 3200 units), then when working with the Auto ISO function, the camera will not exceed this threshold. Under no circumstances will automation be able to use an ISO above 3200. Maximum ISO Is a very important parameter for setting the Auto ISO function, as it allows you to control the noise level. Photographs suffer from digital noise at high ISOs. For each camera, I recommend calculating a certain ISO value at which you can get a good image result, after which this value should be set for the Auto ISO function.
If, with the Auto ISO function turned on, it is forced to set the ISO value higher than the maximum set for the Auto ISO function, the camera will only work at the forced ISO value. For example, when I shoot in Auto ISO mode, and I really miss the maximum ISO value, I force the value to be greater than the desired value and the camera uses only this one forced ISO value. Important: this principle does not work on all cameras.
You can set and Minimum ISO. This is done not entirely obvious and not for all cameras. When you manually set some ISO value on the camera, it immediately becomes the minimum automatic value. For example, if the camera had manual ISO control, and the ISO value was equal to 800 units, then when Auto ISO was turned on with a maximum ISO value of 3200, the camera will only work at values from 800 to 3200 units. It is very convenient to use in low-light conditions, with telephoto lenses, etc.
Another key point in setting automatic ISO is setting maximum excerpts. Maximum excerpt important in A (aperture priority) and P (program) modes. The Maximum Shutter option allows you to tell the camera the shutter speed to which the ISO value should adjust. It's quite difficult to figure it out without an example.
Auto ISO in aperture priority mode (Mode A)
In 'A' mode, the aperture value (F-number) is set, to which the excerpt and ISO. In Auto ISO mode, the camera tries not to use a shutter speed slower than the Auto ISO function specified in the settings, and the ISO itself will be set only in the selected range (from minimum to maximum).
Example. Let's set Auto ISO like this: the minimum ISO will be 800, the maximum ISO will be 6400, and the maximum excerpt 1/100 second, set the aperture to F / 5.6. The camera algorithm will be something like this:
- F / 5.6 calculated excerpt at a minimum value of ISO 800.
- If calculated excerpt at ISO 800 longer than 1/100 of a second, the camera raises ISO by a minimum step.
- At the new increased ISO again the shutter speed is calculated, if it is 1 / 100s, then the camera was able to choose the optimal ISO. For example, the camera picked up ISO 2500. Then the shooting will be carried out at a value of ISO 2500, F / 5.6, 1 / 100c.
- If the camera went over all ISO values from 800 to 6400 and the calculated shutter speed was constantly longer than 1 / 100s, then shooting will be performed at ISO 6400, F / 5.6 and the calculated shutter speed with these parameters. In this case, the ban on the minimum shutter speed will be canceled and the camera will set the shutter speed longer than 1 / 100s, for example 1 / 40s. In this case, the picture will be taken at ISO 6400, F / 5.6, 1 / 40c. A 99% camera can select the desired shutter speed, as the shutter speed range is very large. This allows you to almost always get a correctly exposed frame.
- If the calculated shutter speed at ISO 800 is shorter than 1/100 second, for example 1/250 second, then the camera does not raise ISO, and shooting will be performed with the settings F / 5.6, ISO 800, 1/250 second.
In fact, the camera does not go through the ISO value, but calculates everything in its own way, but the effect is exactly the same as I described. In words, this turned out to be a very long algorithm of work, but in practice it is easier to understand. It is very convenient to use the aperture priority mode with the Auto ISO function, it is enough to try several times.
Auto ISO running in program mode (P mode)
In P mode, the camera itself determines the optimal aperture, shutter speed, and ISO. The algorithm of Auto ISO in P mode is quite difficult to write. The meaning of it in a few words is this: the camera tries to lower the ISO so as to 'fit' into the minimum shutter speed and aperture the lens. If the maximum aperture of the lens is not enough, the camera raises the ISO. If the maximum aperture and maximum ISO are not enough, the camera lowers the shutter speed below the set. If on the contrary, there is a lot of light, then the camera can set any shutter speed and aperture value with a minimum ISO value. Auto ISO in P mode is intuitive after a few test shots.
Auto ISO in shutter-priority mode (S mode)
In S (shutter priority) mode, the photographer sets the shutter speed, and the camera determines the optimum aperture and ISO. Let us have the same initial data: the minimum ISO value will be 800, the maximum ISO will be 6400, and the maximum aperture The lens will be f / 2.8. We set the shutter speed to 1/320 second and shoot in low light conditions. The camera algorithm will be something like this:
- When the shutter speed is set to 1/320 second, ISO 800 is set and the desired aperture value is calculated.
- If the desired aperture value is less than F / 2.8, for example F / 7.1, then the picture will be taken at ISO 800, 1/320 s, F / 7.1
- If the desired aperture value is required more than F / 2.8, then the camera raises the ISO. Let the camera choose the value of ISO 4000, while the picture will be taken at ISO 4000, 1/320 s, F2.8. As soon as the camera starts raising ISO, the aperture value will always be maximum.
- If the camera was unable to find the right ISO, then the image will be taken at ISO 6400, 1/320 s, F2.8 and the image will not be correctly exposed.
Auto ISO in manual mode (M mode)
In M mode (manual camera control mode), the photographer himself determines the shutter speed and aperture value, and the camera only calculates the optimal ISO value. The algorithm here is very simple. For example, we set F / 16.0, 1/1000 s, the camera will simply try to pick up the ISO value from the given range at which we can get the correct exposure. The mode is very, very convenient in low light. When there is a lot of light, Auto ISO mode is useless when operating in M mode.
Important: modern Nikon cameras have the ability to automatically determine the maximum shutter speed for each individual lens. To do this, specify the value 'Auto' in the minimum exposure settings field. Only some Nikon CLCs have this feature: D3200, D800, D5200, D7100 etc.
How does the camera select the maximum shutter speed for setting Auto ISO? Very simple, the camera adjusts the maximum shutter speed to the focal length of the lens. For example, take a camera Nikon D3200 with lens Nikon 50 mm f / 1.4G AF-S Nikkor. For a focal length of 50mm, the camera will select an automatic maximum shutter speed equal to 1/80 second.
Shutter speed in '1 / x second' is roughly calculated as: x = mm * 1.5, where mm is a numerical value for the focal length of the lens. In our case, x = mm * 1.5 = 50 * 1.5 = 75, which is approximately 1/80 of a second. The camera cannot set the shutter speed to 1/75 second, as this is not the standard shutter speed.
If your camera does not have automatic maximum shutter speed when setting the Auto ISO function, then ask her yourself easy peasy. You need to take an approximate shutter speed of 1 / x, where x is numerically equal to the focal length times a certain factor. For example, I do this if I have a lens Nikon 28-200 mm f / 3.5-5.6D AF Nikkor and a camera like FX, then I take a larger number, which is responsible for the focal length of the lens - 200, and I look for a shutter speed equal to 1/200 second in the setting. If I have a DX camera, then I take 200 * 1,5 (mm * coefficient) and get 1/300 second, you won’t find 1/300 second in the camera menu, so I set 1/320 second.
Important: when working with lenses with a stabilizer, the coefficient value must be selected based on the situation. The same goes for tripods.
Maximum shutter speed is very important when a person photographs while holding the camera in his hands. I have a separate article about this, you can find it here.
Auto ISO has some interesting features.
- Auto ISO can accept any intermediate ISO sensitivity values with a very small step from a given interval. This will help to squeeze the maximum quality out of the existing lighting level in photos. For example, when Auto ISO is running, the camera can independently set the values of ISO 110, ISO 360, ISO 1400, etc. These ISO values are not available with manual ISO sensitivity settings. Some amateur cameras have an ISO sensitivity step of 1 step. This means that you can manually set only ISO 100, 200, 400, 800, 1600, 3200 and the like, that is, the ISO sensitivity values in such cameras differ by half, and you can not set something in between. These cameras include Nikon D40. On more advanced Nikon cameras such as Nikon D90, D7000 etc. You can set the ISO sensitivity step equal to 1 \ 2 and 1 \ 3 steps, this allows you to use the manual ISO setting with intermediate values. For instance, Nikon D80 can afford to set the following range of ISO values: 100, 125, 160, 200, 250, 320, 400, 500, 640, 800, 1000, 1250, 1600, 2000 (hi0.3), 2500 (hi0.7), 3200 (hi1). For example, when in poor lighting conditions ISO 1250 is too low for the shutter speed and aperture required by the photographer, and ISO 1600 is already unacceptable for obtaining low-noise photography - then the automatic system can help the photographer and set a compromise average value of ISO 1400 for the exposure. photo, I do not resort to an ISO value higher than necessary.
- Automatic ISO is just very convenient in that the camera can select the very lowest ISO on which you can get a photo.
Every single Nikon camera has a lot of its subtleties when working with Auto ISO. Here are the ones I've come across:
- Камеры Nikon D1x, Nikon D1h, Nikon D1 does not support the auto ISO function.
- Nikon D100 supports function only in S, M. modes
- Nikon D2H, D2H support the function only in modes S, M. For modes A and P, you need to update the firmware.
- On most cameras, in automatic camera modes (Auto, portrait, sport, macro, cute cat with a flower) Auto ISO always works and its work cannot be controlled. That is, you can not set a threshold or shutter speed. Usually the camera sets the lowest possible ISO value and uses the built-in flash.
- Some cameras, such as Nikon D100 they do not allow you to set the maximum ISO value for the auto-ISO function and at the same time use the entire range of basic ISO values. In case of Nikon D100For example, this is ISO 200-1600.
- Auto ISO often cannot use lower ISO values, for example Nikon D90, D700 in Auto mode, ISO cannot use the lower limit of ISO 100 (lo1) Also, some cameras, for example Nikon D80cannot use upper ISO values such as Hi1 for Auto ISO to work.
- Most cameras allow you to set only the limits of the ISO value, which differ by one step (twice). For example, you cannot select a ceiling for ISO 5000, but only ISO 3200 or ISO 6400.
- It is very strange, but for different Nikon central control centers, the Auto ISO setting is in different menu items. This is not always convenient, for example, I have several cameras and sometimes I get confused in the menu of different cameras.
- Many cameras have a very meager range of minimum shutter speeds for setting Auto ISO. For example, for Nikon D80 You can select the maximum shutter speed for Auto ISO from 1 second to 1/125 second. For Nikon D200 - from 1 second to 1/250 seconds. Believe me, 1/125 seconds - in many cases this is a lot, for example, such exposure is sorely lacking for convenient adjustment when working with telephoto lenses. At the same time, many Nikon cameras can use almost the entire range of maximum shutter speeds, for example, Nikon D700 can take a maximum shutter speed from 1 second to 1/4000 second - it's damn convenient for working with telephoto lenses.
- Auto ISO often behaves unpredictably when working with flash. Usually, when the external or built-in flash is turned on, the camera selects the minimum set or available ISO value, but sometimes when shooting with the flash, the camera automatically picks up the ISO value. Usually, ISO is raised at the maximum focal length of the zoom lens and with a long focusing distance.
- Many cameras have one or more programmable buttons. It is very convenient to configure the programmable button to turn on and / or control the Auto ISO function. This is sometimes difficult or not possible at all.
- Some cameras show 'ISO AUTO' in the optical viewfinder, and some cameras also show the value at which the picture will be taken. This can be used very well, for example, immediately change the shutter speed / aperture and achieve the lowest ISO values.
- Auto ISO does not work on younger Nikon cameras when using non-chip lenses, such as AI-S lenses type
- When working with external flashflash shows distance of his work (GN) only for the maximum ISO that is selected for the Auto ISO function. This is not always convenient.
- Some Nikon CZKs themselves choose a threshold for the minimum ISO value, for example Nikon D7000, D5100, D3200 when Auto ISO is on, it always uses the ISO 100 - ISO maximum range.
- In camera control mode M, the Auto ISO function may ignore set minimum ISO and use ISO from 100 (or 200) to the specified maximum value.
- When viewing data for pictures that were shot using the auto ISO, ISO value is highlighted in red (usually highlighted in red if the ISO is greater than the minimum value for this function, but there are nuances for different cameras).
If you know some of the nuances of Auto ISO for your Nikon camera, leave them in the comments.
Personal experience
I understand that there is a lot of boring text, but just understand how Auto ISO works on Nikon cameras and everything will become very clear. Instead of rereading the algorithms I have described, I advise you to simply experiment on your camera. Impressions and questions ask in the comments.
Conclusions
Auto ISO - very useful feature, access to Auto ISO on Nikon cameras is carried out only in P, A, S, M modes. The function works quite specifically, but intuitively.
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Material prepared Arkady Shapoval. Training/Consultations | Youtube | Facebook | Instagram | Twitter | Telegram
Hello Arkady,
Thanks for your articles, they help me a lot in mastering this world of digital photo. The other day I went to a child for a children's dance holiday, where I decided to try how the autoISO function works, because I did not want to blind children and test photos with a flash didn’t like me. As a result, I got good photos that correctly conveyed the lighting and the atmosphere of what was happening. Yes, when scaling, they are noisy, but for personal personal use, what I need. The shooting took place in a room with normal fluorescent lighting on a Nikon D5200 18-140mm DX VR AFS camera in shutter priority mode 1/80, auto ISO 800-3200, exposure compensation + 0,7EV, AF-C focusing 9-point dynamic. The automatic machine set ISO from 1000 to 3200, more often closer to 2000, there were a lot of 3200))).
Since I bought a reflex camera recently, I still have to study and study….
Congratulations to all a Happy New Year! and merry christmas!
Arkady, please help me. The D3200 does not allow setting “auto” in the ISO sensitivity section - it says that the parameter is not available at the current camera settings or in the current state of the camera.
What needs to be done to make the function active?
Thank you!
Use modes P, A, S, M. This is indicated in the article.
I have a Nikon 5100, it also does not allow me to do this in the “auto” mode, but in modes A, P, etc. allows you to customize.
Happy New Year to everybody!!! Question. I have two cameras: Nikon D7000 and Fujifilm FinePix S5 Pro. An interesting feature was noticed in Fuj's work on AutoIso when the flash is on (both built-in and external): the camera selects the ISO value according to the level of general illumination of the scene, i.e., it manipulates the flash pulse, holds the set shutter speed (A and M mode), and Iso raises in the last turn (and very smoothly, not in feet). You can adjust the Iso value by compensating the exposure (mode A) and the aperture (mode A and M). Very convenient! (2005 camera release ?!))))). On the D7000, with AutoIso and the flash turned on, the camera selects the maximum allowable Iso and (as I understand it) reduces the flash pulse. (?!) What does it mean, when I try to adjust Iso with exposure compensation, the camera again changes (and w, +) flash power (prescribed in EXIF). The result of such shooting is obvious. Is it something I’m not catching up with, or is it something in the Nikon D7000 that is wrong? Who has something to say, help me figure it out, please.
I have one assumption in this regard:
the camera does not set the maximum allowed ISO in the automation settings, but depending on the selected aperture, the distance to the object and possibly the overall illumination (you need to test with the artificial light turned on and without it). I recently bought a camera myself and shot it when I was still small, but I discovered such a thing that when shooting at home; mode A, ISO 100, maximum allowed auto iso 1600, external flash Nissin di466, depending on the aperture and distance, was varied from 100 to 400.
Moreover, at 50 f1.8 very often there were pictures with ISO 100, and at 35 at the same aperture 1.8, almost all pictures at ISO 400. While reading the instructions, I found a plate showing the dependence of aperture, distance and ISO. Is it not her that the camera adheres to when shooting? Again, it's not so bad if the camera raises the ISO - the backgrounds are more tight and the batteries in the flash last much longer.
The fact that 50 mm is ISO 100 is a coincidence. After changing to 35, I changed the maximum shutter speed in the auto-iso settings from 1/60 to 1/125, respectively, and the shutter speed was 50mm 1/60, and 35mm 1/125.
Nikon d3100 + kit nikor18-55 + puff Yongnuo YN468-II for Nikon TTL
ISO in the modes P, S, A, behaves (as Arkady noted in the article) is not predictable: with a maximum value of ISO 800, the ISO value in the pictures (in the same camera position) is different, then the maximum is 800, then 100 . At 800 and even 200 there is overexposure (I apologize for the jargon, I'm learning current) photos. Normal photos are obtained only at a fixed ISO value of 100.
Actually the question: Is that how it should be? And is it so important to set the ISO above 100, if even with this value of iso, the photo quality is quite satisfactory.
And yet, it may be off topic: Arkady, please recommend the most suitable settings for my camera so that when you throw the bride’s bouquet, I could catch this moment. I put it on the series, but because of the lack of lighting the photos turned out to be blurry. Yes and on the series, the flash does not fire (set the MULTI mode)
Thank you in advance.
Try to set ISO manually to 1600, Nissin di466 was enough to shoot a series until the d3100 buffer is full. Better noisy frames than nothing at all.
Thank you Igor, your advice with a shutter speed of 1600 helped, it also works fine at 800 ISO. The main problem was setting the puff in multi mode, increased the pulse duration, it was 1/128 set to 1/4, it turned out.
Good afternoon. I changed Nikon 7000. In one article on the Internet, I subtracted that with auto ISO + flash, ISO decreases when the flash is on, mode A. I tried it, I did not change either ISO, shutter speed or aperture, the picture became brighter. Could you please explain how it should be or ...?
On my D5300, the minimum ISO is set in the SHOOTING MODE MENU -> SENSITIVITY SETTINGS. ISO. There the first item is "ISO sensitivity". In the “Auto. management feels. ISO ”this is the minimum value for ISO, I checked. Also, the maximum exposure is set in the same menu, the range of maximum exposure is from 1/2000 sec to 1 sec.
Thank you so much for your work. It is very rare when a person versed in the subtleties pays so much attention to social work. Thank you very much from all Novosibirsk. I have been using this for 5 years, if not more, but it never even occurred to me to describe ...
One remark to your correspondents: comrades, ask questions after having read the article a couple of times and tested it on your camera. Most questions are from careless reading. The article is written superbly! It is felt that the author thoroughly knows the subject. I began to recommend your article in my posts on different sites, I hope you will let me continue to do so.
Once again, thank you very much and deep respect personally from me and your fans.
For example, the camera works with ISO: from 100 to 25000.
We put, for example, “Maximum ISO value” - 15000 (such as maximum working).
What is the "Sensitivity" in the camera settings should I set:
- average, something like - 7000
- minimum - 100, so that there would be no noise ... in general.
- or EVERY TIME at each shooting do we change the “Sensitivity” based on the shooting conditions?
- or is there some other option.
Each condition ideally requires its own settings.
I sat in the room and tried three different ISOs to set and remove.
I set the "ISO sensitivity" ... ... closer to the maximum, the picture turned out to be bright. Perhaps even here and there losses in highlights, you need to look at the monitor.
Set "ISO sensitivity" 200 ...., the picture came out darker.
I set, “ISO sensitivity”… .type “middle”, the picture is also bright (compared to ISO 200) ……
In general, you really need to set the "ISO Sensitivity" for the situation.
But I do not really like the histograms in all three pictures.
The right side is "poor"
"Some Nikon digital controllers choose their own minimum ISO threshold"
I do not understand, I have a D7000 and I can freely choose the minimum ISO value
Arkady, you have used both lenses - Nikkor 70-300 mm VR and the one with 4-5,6G. Tell me, will the second one work just as easily with my D7000 camera? In the sense - to quickly autofocus and produce the same sharpness of frames? Why am I asking? Suddenly, an alternative appeared - to sell the expensive one, and with the proceeds to buy the telephoto and 50-ku named by the second. Sharpness and speed at both ends are important to me - I go photo hunting on weekends.
55-300 mm I used twice - some kind of confusing, in a word, does not suit at all. Even for $ 80 did not take.
Good day! please, tell me what the problem is, in mode A I want to set the auto ISO mode, go to the sensitivity settings, set 1) automatic control. ISO-on, maximum shutter speed and ISO values, but in the first paragraph, where the ISO sensitivity selection “auto” is not pressed, writes “this parameter is not available with the current camera settings or current state”. help please, what's wrong in advance thanks! camera nikon d5100
Put the camera in one of the modes P, A, S, M.
it has already been translated, all the same to no avail
Arkady, please tell me d3200 in the settings of iso on auto poppy iso costs 6400 and on poppy shutter speed stands auto, is this normal setting for auto iso? Or change something? Thank you in advance.
For most tasks, it will do.
D90. In the article, you indicated - "If you force the ISO value to be higher than the maximum set for the Auto ISO function when the Auto ISO function is enabled, the camera will only work at the forced ISO value." But it also continues to work for me at the specified maximum, and not on the changed one. Why? Thanks.
In the article, I also indicated
this is the answer to your question
I get it. Thanks so much for the quick reply.
Thank you for an excellent article. Very cool, talented explained.
In the paragraph “Auto ISO operation in shutter priority mode”, as an example you give min ISO 800, max. ISO 6400. In camera 7100, for example ISO 6400 is the maximum (excluding expansion)
A question. If you select min ISO 800 in the settings, max. ISO 3200, poor lighting, i.e. hole at the limit, will a camera climb higher than 3200? Or will the frame be underexposed?
No, no further 3200 ISO will be installed. What would be the point of setting the maximum ISO value then?
Thank you
Hello, thank you very much for the article, it is very readily written! Only for some reason, on my D80, the function is not active in any of the listed modes, what can it be connected with? Thank you in advance.
Maybe it should just be turned on? + Auto ISO does not work with manual lenses, in green zone modes, etc. I also have d80 and there everything works as expected.
I'm just trying to turn it on, but in the menu, the auto ISO mode does not turn on “when using the current. parameter is not available ”, Nikkor 18-135 lens, tried in all modes P, S, A, M. It doesn't look like a breakdown, maybe there are some other settings that block the activation of auto ISO? :(
help me figure it out, I’m trying to set the shutter speed to more than 3200 when shooting in M mode; I see BULB and the mirror rises and doesn’t let go until I turn off the camera, although I’ve shot normally before. I don’t understand what the problem is, and this is with any ISO, with flash and lighting
BULB is the freehand exposure mode, and this is how it should work.
in shutter priority mode, I can’t set shutter speed to more than 30 and when shooting the mirror rises and does not let go until the camera is turned off, the same situation when shooting in manual mode M, although before the camera listened to shutter speeds in any range, it may have been set incorrectly somewhere .Help me to understand
Nikon d750, mode P. According to the user manual, the camera tries to make the smallest (shortest) shutter speed. According to my observations, she first sets the maximum permitted ISO, and then twists out - shortens the shutter speed and closes the hole. Therefore, on a sunny day, idiotic combinations of the ISO 800 type (restriction), 1/2000, f16 are obtained. If you allow up to 3200, it puts 3200 without a doubt, setting 1/4000 or clamping the aperture even more. What prevented 100 from delivering?
I switched from the canon d650, there the auto iso worked, trying to keep it at a minimum and increasing it only in low light - which is what I actually expect from this function. To be fair, I must say that the automation on the 5d mark2 worked as bastardly as the Nikon d750, which is why I used user modes with different ISO - 100 for the street and 1600 for the premises.
Hello. Nikon d7100 + Nissin Di622 Mark II external flash. When you turn on auto-ISO and set the minimum ISO to 100, the camera sets ISO to 400 when shooting. If you set the minimum ISO to 200 under the same shooting conditions, the camera will set ISO at 800, and if 400, then set it to 1600, etc. ... multiplies by 4 every time !!! What could it be? Or am I dull?
Nikon d7100 + sb800. behaves the same way
When taking pictures in the subway or in transitions with aperture priority, I often came across the fact that the camera sets the maximum allowable setting to auto-ISO and shutter speed of 20-30! It’s no good. I solved the problem by using auto-iso exclusively in manual mode. I set the shutter speed to 80, the desired aperture, and ISO-auto. Exposure is at least 1/80 and there is no movement. When I go out or there is more light, I just slow down the shutter speed.
Maybe there’s a way to make the camera take underexposed frames with auto-ISO in aperture priority mode?
As a rule, you can set the slowest shutter speed.
If you want underexposure, turn the exposure compensation.
The nuance is that the automation does not exceed the specified ISO, but it is easy to increase the shutter speed more than the specified one. Even the built-in hint tells about this if you hold down. That is, putting on one hand an underexposed frame with an acceptable shutter speed or a normally exposed frame, but with a shutter speed of 1/20, I will choose the first option
D7100 if that matters. I basically like my way of working with auto-iso, but is there any other solution curious