Fast (f/2.8) Zoom Lens Recommendations?

Started May 30, 2013 | Discussions thread
Atgard
OP Atgard Regular Member • Posts: 432
KM 28-75/2.8 vs. Zeiss 24-70/2.8

And just to back up what I said before, here are some side-by-side comparisons between the KM and Zeiss lenses. All are 100% crops of unprocessed RAW files, shot wide open at f/2.8.

I realize the test is unscientific, but it was a pretty good "real world" test to see if I could see the difference in actual shooting conditions, not necessarily in a lab on tripod with test chart, etc.

I did try to take care to keep the shutter speed high enough (1/100th or above), brace the cameras on counters and such, and focus on the same points. I took about 15-20 shots with each and the results were pretty similar to the examples below.

#1

#2

#3

#4

Make up your mind before reading which shot is which ...

Each shot on the left is the KM, the right is the Zeiss.

IMO, #1 and #2 clearly favor the KM, while #3 and #4 show the Zeiss a tad bit sharper. I'd call it roughly a wash. And I didn't notice much difference in color (especially trying to test it in #1), although the whites in #3 and #4 slightly favor the Zeiss.

Besides IQ, the silent SSM on the Zeiss is nice. But it is also heavier and roughly 8x the price I paid for the KM.

 Atgard's gear list:Atgard's gear list
Sony SLT-A37 Sony a77 II Sony 70-400mm F4-5.6 G SSM
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