Maybe an extension tube/lens adapter with a slot for rear filters?

After the discussion about IR conversion vs IR filters, I wondered if they make an IR filter that would slip into the filter holder for my 300/2.8?


On 6/19/2016 8:44 AM, Mark Roberts wrote:
The one thing that bothers me about the K-1 is something that I
haven't seen anyone else mention: The ISO settings only go down to
100. I *hate* fscking around with ND filters and I dislike using
diffraction-inducing small apertures, both of which I found necessary
at GFM a few weeks ago when I wanted 30-second (or longer) exposure
times.

You know what would be really cool? An ND filter that fit inside the
camera, in front of the sensor but behind the mirror. Probably
impractical in the real world, but it *would* be cool.



--
Science - Questions we may never find answers for.
Religion - Answers we must never question.

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