No, but poor. The Elmarit sample is not very helpful - both lower corners are "hidden" in darkness. Top corners are masked by having no details - i.e. empty sky. Despite that it is evident that the resolution drops of significantly towards the sides and corners despite being stopped down to f8.
I would say that the sample is poor - as is the performance of the sensor with that lens.
RustyBug wrote:
Even the wider 25mm fares differently from the different design in the outer areas.
RustyBug, I see you quoted the MTF for the Distagon 25; here's the ZM25/2.8 MTF from Zeiss's site, and the Distagon 25 for comparison:
Still not convinced that the ZM25 gets near enough to usable for me, but still looking and might keep looking until Sony brings out a decent 24-ish, maybe even next year, at a price that I can likely stomach.
kosmoskatten wrote:
No, but poor. The Elmarit sample is not very helpful - both lower corners are "hidden" in darkness. Top corners are masked by having no details - i.e. empty sky. Despite that it is evident that the resolution drops of significantly towards the sides and corners despite being stopped down to f8.
Edit: the 21mm shot does look better.
I would say that the sample is poor - as is the performance of the sensor with that lens.
I've asked him to shoot some more with better corner detail @ f/8
Nothings unusable, even a coke bottle. Just depends on your needs.
That elmarit doesnt look so good though. SEM21, not too bad. Maybe we will have enough to get by until zeiss steps up to make a quality native wide angle.
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.
p.102 #10 · A7/A7r - performance with WA RF lenses
Jabberwockt wrote:
It isn't unusable, but if a 28 elmarit or a 21 SEM is THAT soft in the edge and corner on the A7/A7r. Why spend that much money?
I won't, but people have this lens and love it and wonder if it could be used on the A7r---or plain 7, without huge compromise. The center IQ is going to be off the chart with theses lenses. The edges--what I can see--are not bad at all @f/8
but due to the images it's only a hint.
I had basically written both theses lenses off without APS-H crop.
p.102 #11 · A7/A7r - performance with WA RF lenses
naturephoto1 wrote:
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.
Rich
As an owner of the Ultron 28 I also would like to see some results, that said, from my experience with that lens I'd guess its going to be a disappointment. On the m8 it was a stunner, m9 it was ok, nex7... ick.
p.102 #12 · A7/A7r - performance with WA RF lenses
I won't, but people have this lens and love it and wonder if it could be used on the A7r---or plain 7, without huge compromise. The center IQ is going to be off the chart with theses lenses. The edges--what I can see--are not bad at all @f/8
but due to the images it's only a hint.
I had basically written both theses lenses off without APS-H crop.
And I think this is part of the point here, at least for those of us that own some of these lenses. I wouldnt purchase them *for* the A7, but if one already owns them, it would be great to get by for a year. I dont mind selling a body back and forth, but i'd prefer to hold onto my RF glass, as I always seem to re-buy it for more later if I sell it.
At this point, where the industry seems to be going, I'd prefer to buy in as little as possible to a system, and keep my lenses adaptable to future needs/cameras, whether its from Sony, Leica, Ricoh/Pentax, whatever.
p.102 #13 · A7/A7r - performance with WA RF lenses
michaelwatkins wrote:
RustyBug, I see you quoted the MTF for the Distagon 25; here's the ZM25/2.8 MTF from Zeiss's site, and the Distagon 25 for comparison:
Yup, I got a bit twisted first go round with 28 vs. 25.
Interesting to see the diff @ Biogon 28 vs. Biogon 25 that the 25 doesn't dip past 30 (@ 15mm) like the 28 showed.
p.102 #14 · A7/A7r - performance with WA RF lenses
The 21SEM performance there is definitely acceptable for me at f/8 and f/11. I typically use this lens only at f/5.6 on the Nex-7, I may just use it at f/8 on the A7R. It looks like the L/R edges are a tad bit worse on the A7R than the corners are on the Nex-7.
I'm also feeling the same as what coffeeshakes said. I do have a fear that nobody other than Leica will ever put out a FF mirrorless without gobs of refractive sensor toppings. But I'm also happy to hold on to my great lenses and get very good pictures out of them on the A7R over the next year or so.
p.102 #15 · A7/A7r - performance with WA RF lenses
My A7 arrived some hours ago!
I performed an initial test with the G28.
On the display I couldn't see any color shift (distance to the target was about 1m) and vignetting was well behaved.
The lens suffers from massive field curvature. At f/2.8 when I focus the corners and they are somewhat sharp but the center is totally blurred.
I will have the images developed in about 1 hour.
p.102 #16 · A7/A7r - performance with WA RF lenses
Taylor Sherman wrote:
I do have a fear that nobody other than Leica will ever put out a FF mirrorless without gobs of refractive sensor toppings.
That's been my fear as my supposition has long been that Sony needs to and wants to cater more to the needs of DSLR owners looking for a high res state of the art sensor equipped back, more than than they need to cater to Leica owners or M lens shooters using other cameras. There are a good deal more DSLR owners just in the Canon camp alone that are targets for these types of cameras.
After all, they already capture quite a few M lens owners as customers via the NEX series, and while they'd probably never market the A7/r cameras this way, the bodies do seem to be a better "APS-C" camera for problematic M lenses than prior NEX cameras. I can see the marketing campaign: A7r, the best crop camera for your Leica wides ever!
Is it impossible to cater to all of the above simultaneously while also presenting a sensor package(s) that work well with the design ethos of their new FE class native lens line up?
A parallel thought running through my head, given the issues we are seeing on the higher resolution sensor, is that Leica may well stick at the current resolution of the M-240 for quite some time.
p.102 #17 · A7/A7r - performance with WA RF lenses
Phillip Reeve wrote:
My A7 arrived some hours ago!
I performed an initial test with the G28.
On the display I couldn't see any color shift (distance to the target was about 1m) and vignetting was well behaved.
The lens suffers from massive field curvature. At f/2.8 when I focus the corners and they are somewhat sharp but the center is totally blurred.
I will have the images developed in about 1 hour.
Infinity is the better test as performance is going to be at it's best at very close distances as regards sensor+lens compatibility.
p.102 #20 · A7/A7r - performance with WA RF lenses
Tariq Gibran wrote:
Infinity is the better test as performance is going to be at it's best at very close distances as regards sensor+lens compatibility.
I will perform both tests. Right now it is dark outside.
