twoeye wrote: Jochenb wroteExactly the lens I've been waiting for!I am having a hard time deciding between this and the Batis 25, but focal length and compact size of the 2,8/21 is perfect, it is even lighter than I would have expected.
I've found 24mm often not wide enough or too wide.
Looks to be a very nice lens. It's stuck between my 15 and 25 so not as useful for me. But glad to see they continue to expand the line. I do like the size of it.
I am stoked--21mm options are pretty limited in the a7 series with the sensor stack. I am hoping this will be like the Contax g 21 that won't play nice.
I think just by virtue of how crowded the field is with good 35s and 50s, the other two Loxias needed to be better than they are.
alundeb wrote:
No signs of weakness in the MTF's and the distortion is now barrel, not moustache.
I thought if the distortion curve goes from going negative to curving in a positive direction, that usually implies mustache distortion.
The 40 cycles/mm lines have a large zone B dip compared to the old Z* 21/2.8.
This one has an aspheric element that the old one didn't and the old one has a floating elements design. No mention if the new Loxia 21 has that. Really surprised by the small filter size, wondering how much vignetting it will have.
, lens whores have more social redeeming values than bag-a-holics. At least as far as photography goes. But I didn't know I was one till today
John, recovering bag-a-holic who just scored an OM 135 for $25.
wayne seltzer wrote: alundeb wroteNo signs of weakness in the MTF's and the distortion is now barrel, not moustache.I thought if the distortion curve goes from going negative to curving in a positive direction, that usually implies mustache distortion.
The 40 cycles/mm lines have a large zone B dip compared to the old Z* 21/2.8.
This one has an aspheric element that the old one didn't and the old one has a floating elements design. No mention if the new Loxia 21 has that. Really surprised by the small filter size, wondering how much vignetting it will have.
Very minor mustache, less than even the SEM 21. Performance gradually declines so the dip is not as noticeable. Vignetting is much better than any rangefinder 21. Good point on the floating elements, they didn't say that in the brochure so I assume not.
wayne seltzer wrote: alundeb wroteNo signs of weakness in the MTF's and the distortion is now barrel, not moustache.I thought if the distortion curve goes from going negative to curving in a positive direction, that usually implies mustache distortion.
The 40 cycles/mm lines have a large zone B dip compared to the old Z* 21/2.8.
This one has an aspheric element that the old one didn't and the old one has a floating elements design. No mention if the new Loxia 21 has that. Really surprised by the small filter size, wondering how much vignetting it will have.
The distortion curve has to rise significantly again for the distortion to be recognized as moustache. The curve for the Loxia 21 is almost identical to the ZF/ZE 25, and that is not referred to as especially moustache.
Regarding the zone B dip, I would hardly call it a weakness, it is just about 2% or so below the Otus 55 MTF at f/4.
I expect to stay with my M WATE which offers more flexibility. I am waiting to hear more and handle the Leica SL once released hopefully at PhotoPlus on October 22 in NYC. It is possible that I would go that route instead of purchasing the A7rII. My A7r will become my second body to either the Leica SL or the A7rII. The WATE would make more sense to me to work on both camera systems (providing the M lenses will perform well on the SL).
nehemiahphoto wrote:
I am stoked--21mm options are pretty limited in the a7 series with the sensor stack. I am hoping this will be like the Contax g 21 that won't play nice.
I think just by virtue of how crowded the field is with good 35s and 50s, the other two Loxias needed to be better than they are.
It looks sharper than my G21 at WO (just like the MTF suggested). But I think the G 21 is best known for its decent performance with almost zero distortion in a very small package. This one is better technically, except in distortion, being much heavier and bigger.
just in time to stop me from buying the contax g 21 too.
this is the first e-mount lens that actually looks attractive to me.
it looks like there is next to zero benefit to stopping down from the mtf, just dof and ridding oneself of vignetting. wonder how it does for coma shooting the night sky?
sebboh wrote:
it looks like there is next to zero benefit to stopping down from the mtf, just dof and ridding oneself of vignetting.
Surprisingly, the vignetting doesn't change much from f/2.8 to f/5.6 either, according to the datasheet. Fortunately, it is one stop better than the ZE/ZF Distagon 21 wide open at f/2.8 (40% vs 20%).