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Sorry for the massive list of quotes, but just catching up on the discussion and thought I'd put them all in one post...
I would like to see more results of the A7r with the Voigtlander Ultron 28mm f/2.0 which appeared to yield some promising results. Also, and I know it is not a WA RF lens, I would like to see results of the A7r with the Leica R 28mm f2.8 Elmarit V2.
From my experience with it on the M9, I would temper my expectations. It might be fine if you're going to shoot at f/8 or higher all the time. At wider apertures the edges just don't hold up. It's also faithful to mid/lower tier Voigtlander lenses with a tendency to purple fringe and CA is also there. Sure, fixable in post... as is it's lower contrast rendering.
So this is unusable?
SEM 21 f/8
Elmarit 28mm f/8
Charlie, where did you find these and is there any more context from the photographer posted there, or elsewhere?
IMO, the SEM image is O...K... at f/8, but there is still some slight smearing in the outer 1/3 of the image. Sized down to 24 or 18MP it would be less of an issue, or at smaller print sizes. Again, will really depend on final use.
I had a look through his other images, and I was surprised how smeared the 75 Summicron's right edge looked at f/4... can't really judge the left side because it's nearer and in shade. Maybe an adapter issue? But wouldn't be surprised if it wasn't. The WATE (16-18-21) was actually pretty decent wide open considering it's not Leica's best performer in the outer zone...
I think to be a Leica killer, you have to have Leica killing glass, not just an awesome sensor ... what you project and what you capture/record are two pieces of the puzzle that can't escape one another.
If it's Otus-sized glass to achieve such results, then I think Leica will still be among the living.
I'm starting to worry my R28 v2 won't be great neither... It wasn't super great on NEX-7 and it seems
to be parallel to how it is on A7R... Damn, I'm seriously thinking about canceling my order. I have a couple of days
I guess as it's starting to ship here soon.
On the other hand it will probably be great with my CV125 APO and longer M glass. Still, I have no time
to deal with pink corners on most of my shots...
Take a look at the above links from Charlie (uhoh) and see what you think of the 75 Cron results...
As for the R28... What do you think of it vs. the 28 Cron? Leica's MTFs would lead me to believe the Cron is a better performer... But to realize that, you'd need an M240, of which I recall you're not a fan.
You can click on Karel's images for a close up view.
'The Minolta 24mm F2.8 also works beautifully on the Sony.' He has plenty of other casual shots with Minolta lenses, clearly undoctored and WYSIWYG. He used the smart adapter (LA-EA4) for them and so lost some light to the SLT.
As for final IQ, remember lens quality x sensor quality equals final quality. Does Leica have a better sensor?
IIRC, the 45/2 image was at f/8 and the other one was at f/11... Not many lenses look bad at those apertures.. But without doubt, the sensor does resolve very highly. Where Leica's sensor is better, as we're seeing, is with wider RF lenses at wider than f/8...