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05-21-2010, 02:45 AM   #1
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Lens Focus Adjustment and Pentax F 1.7x AF TC

Hi all

If the lens has a focus adjustment of +5, to use the lens with the Pentax F 1.7x AF TC the focus adjustment is the same or is further adjustment needed?

Thanks in advance

05-21-2010, 05:11 AM   #2
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Even with lenses that themselves need a bit of focus correction, I never needed it when using this teleconvertor. It does the focusing without any assistance from the lens.
05-21-2010, 07:25 AM   #3
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Original Poster
I did tried.
The lens and the body = perfect image, the lens plus the converter and the bodie I can't get a decent image.

Will try now with other lens first.

And a similar question, what about a lens that need adjustment and the tamron 1.4x ("sdm version")? It's needed to dial any focus adjustment ?

Thanks in advance
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