Re: [APML] OAG for 2.7" focuser

[Chuck Vaughn <aa6g@aa6g.org>]

Matt,

> FWIW JRF's OAG (i.e. Lumicon's) doesn't seem to address some issues
> which concern me:
> 1) He's using 35mm film, not medium format.

If you're going to use an OAG you're stuck with 35mm since the prism
will block part of a larger format. At best you'll have a large
shadow on a medium format frame.

> 2) His system doesn't seem to employ corrective optics (e.g. field
> flattener) near the film plane.

I mounted the FF in my 130EDT and RC OAG's. That's the best way to
solve the problem.

Chuck <aa6g@aa6g.org>


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