why the 24mm E-mount Zeiss is so big# PhotoGear - 摄影器材
n*b
1 楼
咋解释也没用，反正就是个杯具
"One of my good sources explained why the new Zeiss 24mm f/1.8 lens is so
large: “The large lenses have optics that are usable, with minimal
modification, with SLT cameras. NEX-7 is a high quality photographic tool.
Shorter size lenses would have very short distance of the rear lens element
to the film plane. With small exit lens on wide lenses there would be too
much light fallout. That is why a high quality WA lens needs to be bigger.
The problems with NEsystem. Very short flange distance is excellent for
making inexpensive, quality, small WA lenses. The problem is light fallout
at the edges of the picture –because the exit pupil of the lens would be
too small and close to the CMOS. It is the reason the new 24 mm Zeiss is so
big.” Reminder: The Zeiss will cost around $999 and it will have a 16cm
close focusing distance."
"One of my good sources explained why the new Zeiss 24mm f/1.8 lens is so
large: “The large lenses have optics that are usable, with minimal
modification, with SLT cameras. NEX-7 is a high quality photographic tool.
Shorter size lenses would have very short distance of the rear lens element
to the film plane. With small exit lens on wide lenses there would be too
much light fallout. That is why a high quality WA lens needs to be bigger.
The problems with NEsystem. Very short flange distance is excellent for
making inexpensive, quality, small WA lenses. The problem is light fallout
at the edges of the picture –because the exit pupil of the lens would be
too small and close to the CMOS. It is the reason the new 24 mm Zeiss is so
big.” Reminder: The Zeiss will cost around $999 and it will have a 16cm
close focusing distance."
