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Latest Review Posted Tamron-F 1.4X Pz-AF MC4
Actually, with the arrivel of digital photography I don't see the point in using teleconverters... Just crop the picture and you will have better IQ :lol: Wild Mark perfectly demonstrates it in his review with the test pictures of electricity wires. After reading too many positive comments here on pentax forums I actually bought this hailed Tamron converter a year ago. Mainly because I got it for a cheap 100 euros NOS. Tried it twice on my FA 2,8/135 (yeah, don't laugh :p) and sold it off on ebay for thrice the price. Loss in sharpness, contrast, f-stops, AF-speed, you name it... Cropping the picture to mimic a 200mm yielded way better results. If you still want full resolution AND picture degradation, just extrapolate the raw-file in advance in order to retain those 24 MP after cropping. Then you have the same without spending hundreds of bucks ;) Think this was the reason why Pentax was so reluctant to come out with any new TCs for years.

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