What I said is Lloyd tested ZM 35/2 and ZM35/1.4 on M240 and Biogon won for landscape, according to him. That probably at least F/5.6
That is a fact. I did not intend to say anything else. Apologies if I wasn't clear.
Obviously it won't win on any A7, well maybe on my new supremod.......
I still am skeptical the RX1rii will loose for landscape at f/8 or F/11 to ZM35/1.4 on A7rii, and I'd also think the Loxia would beat the ZM35/1.4 at those apertures.
But I have no idea what is the real case, of course.
above RX1 below Loxia:
Zeiss could not imagine anyone would go below F/4 on the ZM35/1.4
My money is on the RX1rii in a very careful test. Copy variation could easily swing it, though. The Rx1rii cameras supposedly have sensors aligned by copy by technicians. But some sake the night before....or a impact....And the ZM 35/1.4 is made by Cosina, which has also, like Solms as well, put out some varied copies.
Zeiss is far too coy with MTF F/stop selection.
Biogon-T also only goes to F/4:
But if you extrapolate to F/8 I think Lloyd may well be right. Not a given. But the Biogon lines are very smooth and you expect the edges to come well up. The 1.4 has mid zone drop and far edge crash. More to fix, but not impossible.
The RX1(r2) on paper though looks like it's great for landscape any my few shots bear that out. Once you find infinity, which is PITA on all Sonys, but especially terrible with focus by wire.
Where the POF is I have no idea, but I was impressed
Despite my efforts to learn and lots of help, my results with the camera were too unpredictable in daily use. It gave me some fantastic shots and missed some no-brainers even after weeks of practice. M9 was a great relief to return to, but I still have the RX1rii at the house.
Skiing I take the M9 over this or A7. I can trust it with low number of frames. I don't like the extra weight, but I take small lenses.
Charlie the ZM 35 f/1.4 MTFs are clearly better than the ZM 35 f/2 MTFs. We don't really know.about the Rx1rII those are theoretical MTFs not measured ones. Fred has done careful testing of the ZM 35 f/1.4, the Loxia 35, and the Rx1RII at infinity and he rates them ZM 35 f/1.4 the best followed closely by the RX1rII, followed by the Loxia 35 which gets close to the others at F11, but isn't quite as good.That is on the A7rII. You can look up the tests, but he has said this may times.
By the way the Zeiss reports the ZM 35 f/1.4 at f/4 and the ZM 35 f/2 at f/5.6 because these are the respective best apertures as they see it. They won't be the best across the frame and Zeiss seems to emphasize centre sharpness in making this decisions. Lloyd actually has MTFs for all the apertures on his site. I paid once, but decided it wasn't worth the money, but the graphs are there.
Jan 23, 2017 at 08:33 PM
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