Frederik0711
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 Re: Pre-order: Sigma 24mm f/3.5, 35mm f/2 and 65mm f/2 DG DN lenses | |
tsdevine wrote:
Wish I had the a7R IV.... Here a 2 DNG RAWs from the Tamron (f/4 & f/8) on the a7R III, ran through Cornerfix which is my standard workflow. Also put two processed versions there as well.
I'd be curious your thoughts, as I have not shot the new Sony 35/1.8. I have the 35/2.8 ZA and various other 35's, but the Tamron gets me in the CV 50/2 ballpark. It's the only lens other than the Sigma 35/1.2 that gets 5 stars on based Marc's tests, since you mention Sony Alpha Blog. Now I don't take everything there as gospel, but it is a data point.
Tamron 35 f/2.8 Di III OSD 1:2
Anyway, back to the Sigma's, which I am interested in. At least the 35 and 65.
-Tim
Frederik0711 wrote:
Fred Miranda wrote:
Frederik0711 wrote:
Sadly, not even the Sigma 35mm f/2 DN can resolve the whole sensor of the Sony a7R IV when stopped down. Still waiting patiently for a compact 35mm to be able to resolve the whole sensor at "landscape" apertures. I'm sure Voigtländer got this with a future 35mm f/2 APO-Lanthar. Might even prefer a 28mm APO if they make one. The 65mm DN seems to be outstanding all around, though.
I'm not sure I agree here. It does not look like the Voigtlander 50/2 APO is the sharpest 50mm at center. (The CV 50/1.2 and 50/1.4 ZA are sharper at f/2 and still a little better stopped down):
https://www.fredmiranda.com/forum/topic/1625777/0?keyword=fm,review#chapter2
https://www.fredmiranda.com/forum/topic/1561782/32#15314691
Only at center, we can see the A7R IV's advantage in resolution when using our best lenses (135/1.8 GM, CV 65/2 APO, Batis 135)...However, off-axis, there is not much difference in resolution between 42 and 61MP:
https://www.fredmiranda.com/forum/topic/1613747/0?keyword=a7r,IV#14982782
The new Sigma 35/2 seems to capture fine detail wide open at mid and long distance, especially at f/4. Although not quite as good, it performed neck and neck against the Sigma 35/1.2 Art in a review I saw. I think it was from Cameralabs.
I'm not sure if you misread my comment, but I never stated that the Voigtländer is the sharpest 50mm in center at f/2 compared to other 50mm lenses in this aperture range. I'm sure we would even need sensors of higher resolution to determine the actual divergent between these lenses, as they are very close to, if not reaching the barrier of the Sony a7R IV's sensor. At least that would be necessary if one would want to inspect the absolute difference in potential, as we aren't sure if this is the actual limit of the potential of the given lenses. A lot of upcoming options seem to be able to be very close to if not outresolve the a7R IV already, at least to some degree as in either all over the frame, or just the center, so expectations do increase, and higher resolution is needed to differentiate potential. Although I haven't tested all of those lenses, I do agree with you that both the 50mm f/1.4 ZA and CV 50mm f/1.2 are sharper in the center at f/2, and the 50mm f/1.4 ZA still being slightly better on the a7R IV when stopped down. That's also the conclusion I came to by reading other reviews, and I find your reviews very consistent. I do however happen to own the CV 50mm APO myself, and love it. But what I mentioned in the previous comment was that a (hopefully) future CV 35mm APO can resolve as much as the CV 50mm APO, which is more than any current compact 35mm lens. My point was, that I don't find any current compact 35mm lens to be excellent in the corners but a bit soft, so I was hoping that this Sigma would do it, but I'm not so sure. After all, I can't conclude that, as I haven't tested it myself in a controlled environment and compared it to other lenses and multiple copies. I can only compare the results that I see online. The Sony 35mm f/1.8 and the Samyang 35mm f/1.8 are said to resolve about the same as this Sigma at f/4, and I didn't find the Sony that sharp in the corners. The Samyang is also greater optically at f/2.8. The test that Cameralabs did was not tested on a Sony a7R IV, but the tests that Sony Alpha Blog did are:
https://sonyalpha.blog/2020/12/15/sigma-35mm-f2-dg-dn-contemporary/
It's hard to compare at such. I wouldn't really opt for the Sony at this point. Both the Samyang and Sigma options seem to be slightly better optically (maybe not at minimum focus distance) and cheaper. The quality of build of the Sigma is levels above both. As an optical perfectionist, the Sony 35mm f/1.8 didn't satisfy me when combining it with my a7R IV. It was never quite excellent in the corners, and it had a lot of chromatic aberrations.
The a7R IV is a phenomenal camere body. I did have to break my piggy bank to afford some of my gear, though, as I'm just a young student, enjoying this fascination. Photography is not even what I study, but who knows.
From what I have understood from several reviews, the Tamron 35mm f/2.8 outresolves the sensor of the a7R II & a7R III in the center and nearly all if not all in the corners, and gets to the level of the a7R IV in the center. The same is however not true in the corners on the a7R IV, where it's "just" very good to excellent, just like the Sony 35mm f/1.8 FE, Samyang 35mm f/1.8, and Sigma 35mm f/2 DN. But it's also depending on one's copy.
I was really hoping for the new Sigma to be able to be as consistent over the frame, but maybe different tests will show. At least Marc's test from Sony Alpha Blog stated that the corners at excellent at f/4 and f/5.6, but that's the same result as what he got with the Tamron, Samyang and Sony, all being excellent. Excellent is fine for most, but I just didn't find my copy of the Sony at least to be great outside of the center. Still, even though none of them might outresolve the corners of the a7R IV, there can still be divergents to inspect. But that's a lot to expect from such lenses, but moderns designs lead to more expectations. The Tamron is whatsoever a bargain for how much it can resolve. So is the Samyang. But there's much more to a lens than resolving power, of course. This new set of Sigma lenses surely seem to have more going for it in terms of design and build. Especially the 65mm is outstanding optically.
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