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Forum: Pentax K-5 & K-5 II
02-17-2013, 12:36 PM
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Stone and Dr. Who. yeah I understood that for long exposures you would need an equatorial mount.
I made my own 10 inch Dobson about 20 years ago after gaining interest in them from watching a program on PBS. I even ground my own mirror. I sold it when I had to relocate for my job and just got busy with life. This next go round I'm not interested in building but looking at some of those Orion Dobs with Goto the goto features are really started to get my attention.
I've seen some pretty impressive pictures taken with DSLR's. and those scopes but of course tons of stacking. I think I might be interested but even the moon and planets seem pretty doable with a Dob.
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Forum: Pentax K-5 & K-5 II
02-16-2013, 06:21 PM
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Dr. Who I have no idea. It was something I read on a forum about astrophtography. Another had asked about using a Dobson with GoTo features and one of the answers was that the back plane issues needed to be solved. It's why I was asking here because I'm not a member there.
After more reading though, it seems I've found my answer.
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Forum: Pentax K-5 & K-5 II
02-15-2013, 09:00 PM
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I'm curious.. I'm seeing that indeed some of you are using Newtonian Scopes but I keep reading that you can't overcome the back plain issue with them or at least not with a Dob..
What exactly is a back plan issue?
I realize that Dobs aren't the best mount for long exposures in fact wouldn't work at all but with stacking is that even an issue ?
Ack.. nevermind. I found my answer on another forum. Planets and such I should be fine. Deep space is another story but can be overcome with stacking.
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