On 2010-12-02 16:14, Ken Waller wrote:

When using them is the difference of getting/not getting the image I
want - I use them.
I can't say the loss of resolution and contrast has been an issue for me
in their usage.

Ditto. When I use one, I'm typically adding it to a long lens to get more reach, anyway, so the image quality is already suffering. :-)

--
Thanks,
DougF (KG4LMZ)

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