Re: [OM] New E-1

[Jeff Keller]

Doesn't a focal reducer make the light rays less perpendicular to the
image plane? ... Just the opposite of what the digital lenses are trying
to accomplish. Even so a long focal length lens has light rays that
could probably be bent.

Does the focal plane move? A telescope eyepiece rack can often move an
eyepiece pretty long distances.

-jeff
I've never used one and it's been at least a couple decades since I read
about them.

----- Original Message -----
From: "Chuck Norcutt" <chucknorcutt@xxxxxxxxxxx>


>
> Here's a thought for an adapter with an optical element.  Has anyone
> considered a focal reducer?  I've never seen one for a camera lens.
All
> we get are tele-extenders.  But owners of Schmidt-Cassegrain
telescopes
> from Celestron and Meade should be familiar with them.  The Celestron
> focal reducer will take my 2000mm f/10 and turn it into a 1000mm f/5
> with a reduced diameter image circle. How about an OM focal reducer
that
> turns your 50mm f/1.8 into a 25mm f/0.9 and compresses all of the
larger
> image circle onto your 4/3 sensor. OK, where's the catch?
>
> Chuck Norcutt
> Woburn, Massachusetts, USA

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