W.Utsch
Member
Re: Fun with the A7/7R
The Zeiss 18/3.5 is the ZE lens and it is new. Its the DSLR version with Canon mount not the ZM Leica . I think the latter got tested a lot and is not working well on the 7's.
These "White Shots" are by no means "scientific", there are to may variables not controlled. The lightning, the medium you shot etc...
The white shot posted eg. was shot very uncontrolled through a white pice of paper against a grey sky (had no time to do it better).
I did these kind of tests with many Cam/lens combinations (the last one was the RX1) and i have never ever seen a combination that shows full even RGB values for "pure" white or grey anywhere in the frame ( if not completely blown highlights). Theoretically that should be the case of course but there are always small differences in the values.
Anyhow: For me the Zeiss 18 works perfect.
Best regards
Werner
Hi Ron,Many thanks, Werner! Looks like your A7R has been getting a serious workout. :thumbs:
I think you're correct - the shift I saw must be due to multiple stages of JPEG-mangling. And due to the two very different light sources at play, it really is unsuitable image to judge color shift to begin with. My bad!
If you take your white shot, however, WB in the center and then look at the RGB-values in the corners, you'll be able to tell for sure if there's any shift.
The reason I asked is because I read that this can be an issue with this lens (at least with the early ZF-version - no idea if there were any changes in coatings, etc. between that and the ZF.2/ZE). Is yours new?
The Zeiss 18/3.5 is the ZE lens and it is new. Its the DSLR version with Canon mount not the ZM Leica . I think the latter got tested a lot and is not working well on the 7's.
These "White Shots" are by no means "scientific", there are to may variables not controlled. The lightning, the medium you shot etc...
The white shot posted eg. was shot very uncontrolled through a white pice of paper against a grey sky (had no time to do it better).
I did these kind of tests with many Cam/lens combinations (the last one was the RX1) and i have never ever seen a combination that shows full even RGB values for "pure" white or grey anywhere in the frame ( if not completely blown highlights). Theoretically that should be the case of course but there are always small differences in the values.
Anyhow: For me the Zeiss 18 works perfect.
Best regards
Werner