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pipnina

By pipnina
in Imaging - Discussion

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Craig a

Craig a

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9 hours ago, pipnina said:

It is a guidescope so I suppose there is the potential for flexture.

I am using this scope https://www.firstlightoptics.com/finders/astro-essentials-50mm-guidescope-finderscope.html  In the default shoe of the main scope. It seems to work fine on some occasions and not so on others however. I've tried to get it affixed as tightly as is reasonable. On my last iris nebula attempt I was averaging a 0.35 second RMS, last night i was averaging about 0.8 on the same target.

The difference in rms could be different seeing conditions between the two nights but I’m a firm believer that an OAG is a must for a Newtonian, I ditched the guidescope a while ago on my 10 inch f4 and went for the zwo OAG, I’ve never looked back, more of a pain to setup but once it’s done no more flexure to worry about 

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