If you mean genuine Pentax, you should check Boz's page, where you'd
find that, no there were no A contact helicoids made by Asahi. Kenko
and probably others, though they might have been just rebrands made a
set of A extension rings but I don't think they ever made a Ka extension
helicoid.
On 12/6/2012 12:02 PM, Collin Brendemuehl wrote:
Is there a helicoid extension tube with "A" contacts?
Or
Is there a helicoid 1.4x or 1.7x tc with "A" contacts?
--
Don't lose heart, they might want to cut it out, and they'll want to avoid a
lengthly search.
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