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Old Aug 25, 2008, 12:12 PM   #1
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Just wondering who might have used these 2 converters (the 1.4 Sigma or the 1.5 Kenko), and what you think of their performance. The Sigma is significantly higher in price compared to the Kenko. Thanks if you have any info....cheers....Don
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Old Aug 25, 2008, 8:22 PM   #2
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I don't have either of these TCs, but I've been thinking of getting one. The only thing I have figured out is that the Sigma APO TC will only work with certain lenses - part of it sticks out and won't fit on lenses that have the back element flush with the back of the lens.

Otherwise, I'd be interested in responses to this question, too.
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Old Aug 25, 2008, 9:12 PM   #3
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if you are going to use it on a sigma compatible lens, get the sigma. it is the best combo. if you are going to use it on other lenses, pentax, tamron, etc... then your only choice is the kenko unless you can find a tamron 1.4x. my sigma will only work on 3 of my lenses, all sigma ex.

edited to include link to list of sigma lenses the sigma tc will work with.
http://www.sigmaphoto.com/lenses/lenses_tele.asp
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Old Aug 26, 2008, 10:44 AM   #4
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Ishino has it right. The Sigma works on my Sigma lenses but only on one other lens (A Vivitar TX mount lens). The lens elements stick out towards the lens mount and prevents most lens of other brands from mounting on it.

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Old Aug 26, 2008, 3:03 PM   #5
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Thanks everyone. Looks like the Kenko is the one. Don't think they're making the Tammy anymore....Don
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Old Aug 27, 2008, 11:31 PM   #6
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thekman620 wrote:
Quote:
Thanks everyone. Looks like the Kenko is the one. Don't think they're making the Tammy anymore....Don
I hope you put up some full long shot demo's with the Kenko soon.
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Old Aug 27, 2008, 11:40 PM   #7
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FWIW I had a Kenko 1.4 and didn't like the results I got from it compared to the Tamron 1.4 and the Pentax 1.4x-S converter.

Tom
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