Why no mirror telephotos for DSLR Canon?

Started Jan 25, 2010 | Discussions thread
Lee Jay Forum Pro • Posts: 52,718
Re: I have a $700 1900mm f15

Bill MacBeth wrote:

I sill have the telescope and need to know -- can a 5DM2 operate without a lens, to use eyepiece projection?

Yes, but eyepiece projection (a.k.a afocal) requires a lens on the camera. Otherwise, it's called "prime focus".

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Lee Jay
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