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Old 13-09-2017, 09:04 AM
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alocky (Andrew lockwood)
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Join Date: Aug 2010
Location: perth australia
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Quote:
Originally Posted by gregbradley View Post
A barlow on a small APO will take forever to get some signal.
Not enough aperture for galaxy imaging.

You can do it but expect to put in massive hours.

Greg.
Hi Greg - my take on that piece of advice was that since Andy already owns the camera (v. expensive) and mount (also expensive) he should use the Barlow (cheap) to see if (1) his mount is up to guiding at long focal length, and (2) what the image scale and local seeing delivers at around 1.2m focal length before buying a new imaging ota (v. expensive) that may require another mount (v expensive) or camera.
I don't think anyone was suggesting it as an alternative final solution!
Cheers
Andrew.
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