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The following opinions have been automatically translated with Google Translate.
Opinion:Excellent wide angle, excellent resolution even at the edges and larger openings. Contained vignetting and no distortion. Plastic construction, but of excellent quality. Diaphragm ring with declick. Very realistic and full colors. Low weight and excellent ergonomics. I think it's a good buy, especially with Sony cashback.
Cons:No one at the moment. It may seem annoying the internal movement when the machine is off. But I was already aware of it.
Opinion:I was very undecided whether to take the 24mm GMaster or this new 20mm G, since everyone hays the 24 as one of the best sony lenses, but I wanted to take a risk. The main purpose was (and is) to have a light lens, almost a whole do, that would replace the 1635gm. Did he do it? Still it is too early to say but I definitely found a lens that allows me to travel light and comfortable. In the first home tests I did it seemed brighter at the same focal point, although to be honest it is almost a 19 mm (I have to check it accurately). I tried freehand street shots and I have to say that the drooping lines were perfectly aligned, no distortion or correction to do. Flare? a little bit in backlight conditions, but beautiful star. For the stars, it's not quite ideal, at 15 seconds, the stars have already come to me crawling. However I used it in suboptimal light conditions, so I will update the review (if you talk about it in 2021 I know). I'll update you soon on new sensations of this lens. (25/09/2020)
Pros:Sharpness, ergonomics (manual diaphragm, AF/MF key and fire memory), Low Distortion, Low Chromatic Aberration, Bright, Low Flare, Aesthetic, Standard and tolerant diameter filters
Cons:Missing metric scale, general structure from plastic autofocus, high absorption of light from the optical system.
Opinion:Among the present 20-21 mm autofocus, bright species, is the best I've seen. The resolution is high from all opening and towards the edge, with optimal yield around f/4. Sony/Minolta classic color, lò well even in poor light, European, low CA, low distortion. The frame is also among the best autofocus, rather compact, protected, with rich controls. It lacks the external focus scale, though. The macro-contract is high. Simo at batis level. Compared to the best manual focus (Zeiss, Voigtlander) you can see a slightly lower macrocontract, a higher absorption of light (2/3 diaphragm, f/1.8 is about f/2.5 of an MF) for the more complex optical scheme and a still "one hair" resolution lower. The metal frame of these manuals promises a longer lifespan and not a little. This Sony still seems better to me than the alternatives Nikon, Sigma, Tokina. The value for money is very good.