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02-26-2009, 04:13 PM   #1
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Sigma 120-400 and 50-500

Does anyone have the experience with these lenses? Is there a big different in size and weight? The 120-400 is 200 dollars cheaper. I have a 1.4 tamron that I could use on the 120-400 lens.

02-27-2009, 05:53 AM   #2
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QuoteOriginally posted by jon pafford Quote
Does anyone have the experience with these lenses? Is there a big different in size and weight? The 120-400 is 200 dollars cheaper. I have a 1.4 tamron that I could use on the 120-400 lens.
I believe the 120-400 is a fixed apature F5.6 lens, making it F8 with the 1.4 TC. I doubt AF would work with the TC attached

the 50-500 (BIGMA) has many posters in the forum, who have produced excellent shots with it.

I think both lenses have been reported as slightly soft, wide open at maximum focal length, although as I own neither this is only repeating (from memory) what others have posted.

check the lens review section
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