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Coronado-Canon interface

Started by RobertHowe, 01/08/2012 09:38AM
Posted 01/08/2012 09:38AM Opening Post
I am gearing up for the impending annular eclipse and Venus transit. I find myself unable to connect a Canon EF Rebel camera to my beloved Coronado 60, a very fine scope which outperformed a Lunt 60. The Coronado requires use of the diagonal for proper filtration of the sunlight, so one is obliged to use a 1.25 inch camera nosepiece plugged into the Coronado diagonal. When I replace the lens with such a nosepiece for prime focus photography the Coronado does not have adequate in-focus to give a proper image. I got around this by adding the Cemax 2x barlow, with this I can get a focused image, but the sun laps at the edges of the image frame. This is not suitable to use in the field (at the Grand Canyon, yet) and there does not seem to be such a thing as a 1.5 x Barlow.

Ideas?

Robert Howe
Wilbraham MA


TeleVue 85 f/7 // Astro-Physics Traveler 105 f/6 // Astro-Physics 130 f/8.35 // TEC 180 f/7
Coronado 60 DS
"Scopes, Brains and Wisdom--but no Beauty"
Posted 01/09/2012 06:51AM #1
I think your best bet is a 1.25" OCS designed for binoviewers like this one:

http://deepskybinoviewer.com/index.cfm?fuseaction=product.display&Product_ID=62

It should allow you to focus the camera without adding much magnification. I would contact Denkmeier directly to be sure but it should work for your application.

Joplin