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10-10-2010, 11:17 AM   #1
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IQ Takumar 500 f/4.5 vs Sigma 170-500

Before I bought my first super-tele (>>300mm), I scouted the internet, but options are somewhat limited here in South Africa. The main options being Sigma 50-500, 150-500, or old stock 170-500. The general indication was that the 170-500 was ok, but somewhat soft above 400mm.

I ended up buying the Sigma 170-500 mostly because I needs something longer than 300mm for birding and the price was right, and the advise was that optically the 150-500 was not a major improvement. Last week I lucked upon a second-hand SMC-Takumar 500mm f/4.5, a Sigma 70-300 APO, extension tubes and monopod all together at a price I could not let slip.

I tested and compared the Takumar against the Sigma 170-500 over the weekend, and perhaps I have a problem with the Sigma, but the Takumar so far is a dramatic improvement ito sharpness.

Thought I'd put it out there; but also to check if anyone has a view if the Sigma is really delivering the best it can, or if I perhaps have a problem with the Sigma 170-500.

Regards
Kevin

Comparison cropped to small area from center of image:

Takumar and Sigma original image factors


10-11-2010, 09:51 AM   #2
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I tried the Sigma 170-500 on my MZ-S and found it soft compared to my M 400/5.6. I sold it off at a loss despite the convenience of the zoom feature and the AF.
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