On October 19, 2023, the Leica SUPER-APO-Summicron-SL 1:2/21mm ASPH full-frame lens was introduced.
Leica SUPER-APO-Summicron-SL 1:2/21mm ASPH.
Basic properties
- Lens for Leica full-frame mirrorless cameras with mount Leica l
- Relative aperture: 1: 2 to F / 22
- Focal Length: 21mm
- MDF: 21 centimeters
- Maximum magnification ratio 1: 5.3
- Optical design: 14 elements in 11 groups, including 3 aspherical double-sided elements (scheme)
- Filter Diameter: 67 mm
- Fast Focus Motor Dual Synchro Drive AF
- All lenses in the Leica APO-Summicron-SL series use a uniform 67 mm filter diameter and a maximum aperture of F / 2.0
- Weight: 789 gram
- Price: about 5500 dollars
Appearance
All Leica SL lenses
Full frame cameras with Leica L mount
- Leica SL [October 2015]
- Leica SL2 [November 2019]
- Leica SL2-S [December 2020]
- Leica SL3 [March 2024]
Leica SL full-frame autofocus L-mount lenses
- 21 mm: LEICA SUPER-APO-SUMMICRON-SL 1:2/21 ASPH. [October 2023]
- 28 mm: LEICA APO-SUMMICRON-SL 1:2/28 ASPH. [February 2021]
- 35 mm: LEICA APO-SUMMICRON-SL 1:2/35 ASPH. [February 2019]
- 35 mm: LEICA SUMMICRON-SL 1:2/35 ASPH. [February 2023]
- 50 mm: LEICA SUMMILUX-SL 1:1.4/50 ASPH. [October 2015]
- 50 mm: LEICA APO-SUMMICRON-SL 1:2/50 ASPH. [August 2019]
- 50 mm: LEICA SUMMICRON-SL 1:2/50 ASPH. [February 2023]
- 75 mm: LEICA APO-SUMMICRON-SL 1:2/75 ASPH. [January 2018]
- 90 mm: LEICA APO-SUMMICRON-SL 1:2/90 ASPH. [January 2018]
- 14-24 mm: LEICA SUPER-VARIO-ELMARIT-SL 1:2.8/14-24 ASPH. [October 2023]
- 16-35 mm: LEICA SUPER-VARIO-ELMAR-SL 1:3.5-4.5/16-35 ASPH. [April 2018]
- 24-70 mm: LEICA VARIO-ELMARIT-SL 1:2.8/24-70 ASPH. [May 2021]
- 24-90 mm: LEICA VARIO-ELMARIT-SL 1:2.8-4/24-90 ASPH. Ois [October 2015]
- 90-280 mm: LEICA APO-VARIO-ELMARIT-SL 1:2.8-4/90-280 Ois [March 2016]
- 100-400 mm: LEICA VARIO-ELMAR-SL 1:5-6.3/100-400 Ois [March 2023]
- The L mount alliance also includes Panasonic и Sigma
Materials on the topic
- Full frame mirrorless systems... Discussion, choice, recommendations.
- Cropped mirrorless systems... Discussion, choice, recommendations.
- Cropped mirrorless systems that have stopped or are no longer developing
- Digital SLR systems that have stopped or are no longer developing
- JVI or EVI (an important article that answers the question 'DSLR or mirrorless')
- About mirrorless batteries
- Simple and clear medium format
- High-speed solutions from Chinese brands
- All fastest autofocus zoom lenses
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- Mirrored full frame on mirrorless medium format
- Autofocus Speed Boosters
- One lens to rule the world
- The impact of smartphones on the photography market
- What's next (smartphone supremacy)?
- All announcements and novelties of lenses and cameras
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Material prepared Arkady Shapoval. Training/Consultations | Youtube | Facebook | Instagram | Twitter | Telegram
It’s strange to use the APO nameplate for an ultra-wide-angle lens with a focal length of 21 mm. Before this, I had occasionally seen this nameplate on at least fifty kopecks.
Although the greatest effect is achieved by combining three beams on televisions.
And on the optical diagram there is no attempt to at least indicate glasses with anomalous dispersion.
I don’t understand the essence of the remark at all. You say this as if the magnitude of CA depends only on the focal length) Correcting the CA of narrow and wide beams in high-aperture optics at such an angle is generally a non-trivial task. For example, you may not see the CA on an open hole (just some software), if the SfCA is near zero, but on a closed hole there will be no ringing sharpness - the limit is the size of the secondary spectrum. It also happens the other way around - excellent resolution on a closed one with very pronounced edging on an open one. So, the apochromatic method of CA correction, combined with a reduction in the secondary spectrum as a whole, is an excellent way to make the lens sharp both at open and closed apertures.
For APO correction in a complex scheme, it is not necessary to have ED glass. Glasses like TFC (ZPK, heavy phosphate crowns), which formally do not belong to ED, and glasses like STK (LaK, LaF - lanthanum crowns and flints), which are usually not classified as glasses with anomalous dispersion, can cope perfectly with the task. in fact, they can be classified as kurzflints. There is no point in Leika turning the diagram into a coloring book for marketing purposes - a red circle is enough.
Marketing, and nothing more.
More words Super, Asph, Apo on the nameplate.
I wouldn't say that. The size of the lens already says a lot
Apo, of course, is not always the convergence of three rays. Sometimes it's just a narrow secondary spectrum (less than or around f/2000). However, the performance of the system depends not only on the method of CA correction, but also on the degree of correction. APO can easily be worse than achromat if the application of the reduction of 3 wavelengths is performed inappropriately, in isolation from the value of the secondary spectrum as a whole and ignoring monochromatic aberrations. But I don’t think there’s any trickery to this lens.
With 14 carefully engineered lenses - three of them aspherical - arranged in 11 groups, this lens offers peak performance right from the widest aperture settings. What sets it apart is its apochromatic correction, making it the world's first 21mm APO lens designed for full-frame cameras. To eliminate chromatic aberration, most of the lens elements are made of a special custom glass featuring anomalous partial dispersion, made possible by cutting-edge manufacturing techniques and sophisticated workmanship.
(offsite watering can)
Still, ED glass is declared.
Leica, let's be honest, was not noticed in the unnecessary use of the Apo prefix in cheap lenses of dubious quality for the sake of marketing.