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Good evening. Can you kindly tell me what a terrible fungus is on the lens?
In general, it depends on the degree of damage and the degree of accessibility of the lens for cleaning. If these are, say, isolated outbreaks that occupy a small area of the total surface area, it’s not particularly scary. But the fungus has a tendency to grow, so it is best to either neutralize it with a long exposure to mercury UV (if there is no access to the lens; the method may be ineffective if there are flint lenses in the optical path) or clean it off (there are different methods, their applicability depends depending on the circumstances, in particular the type of coating of the optics).
If the damage is extensive (>10% of the area), pronounced (thick film), then there is a chance that the anti-reflective coating or even the top layer of glass is damaged - such a lens is not worth taking, it’s a lottery. Let me explain: I cured my OKS1-300-1 of fungus so that not a single trace remained, but with Sonnar 4/300 T such a trick is no longer so effective due to different types of coatings and different brands of glass (less chemically resistant in Sonnar ).
Hello!
Help with choosing a portrait lens.
There are two options:
1, Vivitar Series 1 90/2.5
2. Nikon 85/1.8d
Exclusively for hobby.
Thank you!
autofocus with 85tka would be preferable
Thank you!
Please, recommend a good repair and maintenance service for photographic equipment (specifically, the Nikon camera requires less maintenance)
Hello, Arkady.
Thank you for the wonderful site, I read it like an encyclopedia of photography.
Let me ask a question.
I take pictures on a Nikon d3500 in a jeep, viewing through JVI or Live View (LV).
Do I understand correctly that, all other things being equal (same shutter speed, aperture, ISO, exposure compensation, exposure metering method), a photograph “aimed” through the JVI will be cleaner in noise than a photograph “aimed” through LV? Allegedly, when LV was turned on, the matrix worked longer, therefore it warmed up more and made noise on its own, regardless of ISO and shutter speed.
When visually comparing two images of the same object and at the same exposure, I cannot notice that the image through LV is noisier. In my opinion, they are almost the same, only sometimes the shot through LV turns out to be more contrasty or sharper (and sometimes vice versa).
Thanks in advance.
it won’t, it barely gets warm during Live View (not in video mode). And when the shutter is released, it turns off for a fraction of a second, this gives it the opportunity to get rid of thermal noise.