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06-15-2010, 01:16 AM   #1
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Sigma 70-200mm f2.8 vs Pentax 135mm

Hello

Has anyone ever made any comparison shots between Sigma 70-200 f2.8 and any Pentax 135 mm prime?

Thanks

06-15-2010, 04:41 AM   #2
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which sigma lens and which pentax prime

I have the origonal APO 70-200F2.8 EX (non DG Non macro) and the SMC-Pentax 135F2.5

I have not run a test from either but they are both pretty good even wide open.
06-15-2010, 05:05 AM   #3
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QuoteOriginally posted by alvarossorio Quote
Has anyone ever made any comparison shots between Sigma 70-200 f2.8 and any Pentax 135 mm prime?
As a matter of fact, I have--specifically my Sigma 70-200mm f2.8 HSM II (etc., etc.) vs my FA 135 f2.8.
I'm not very sophisticated about lenses (I just own a lot of 'em) so I was mostly just looking a center sharpness.

I concluded that the FA was definitely sharper wide open (the Sigma results at f2.8 were really marginal) but that from f3.5 and up they were pretty comparable. OTOH, the FA is certainly more susceptible to green/magenta fringing (or locoas or whatever) at wider apertures.
06-15-2010, 05:27 AM   #4
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QuoteOriginally posted by dadipentak Quote
As a matter of fact, I have--specifically my Sigma 70-200mm f2.8 HSM II (etc., etc.) vs my FA 135 f2.8.
I'm not very sophisticated about lenses (I just own a lot of 'em) so I was mostly just looking a center sharpness.

I concluded that the FA was definitely sharper wide open (the Sigma results at f2.8 were really marginal) but that from f3.5 and up they were pretty comparable. OTOH, the FA is certainly more susceptible to green/magenta fringing (or locoas or whatever) at wider apertures.
But you have used a bad example for the sigma, I believe most long term users agree that the origonal version performed better wide open, but I would not bet my origonal version sigma against my K135F2.5 because that is a great lens.

I use the two differently, the K 135 is my low light go to lens if I am at just the right distance, or can control distance, where as the sigma is used much more at 200mm and with teleconverters, or where I need fast low light performance at all focal lengths

06-15-2010, 07:25 AM   #5
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QuoteOriginally posted by Lowell Goudge Quote
But you have used a bad example for the sigma,
Perhaps--but it's the example I have.

QuoteOriginally posted by Lowell Goudge Quote
I believe most long term users agree that the origonal version performed better wide open,
So I understand (I'd love the opportunity to swap backward)

I
QuoteOriginally posted by Lowell Goudge Quote
I use the two differently,
Absolutely! I use the 135mm as a candid portrait lens and the Sigma for outdoor sports & events.
06-15-2010, 09:56 AM   #6
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QuoteOriginally posted by dadipentak Quote
Perhaps--but it's the example I have



So I understand (I'd love the opportunity to swap backward)
I am sure you would but I won't be the one to do it
QuoteQuote:

I

Absolutely! I use the 135mm as a candid portrait lens and the Sigma for outdoor sports & events.
same here, except I generally have a TC on it aslo
06-15-2010, 02:58 PM   #7
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QuoteOriginally posted by Lowell Goudge Quote
I am sure you would but I won't be the one to do it
Rats!
06-17-2010, 12:35 AM   #8
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thank you for sharing your experience.

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