You absolutely need a drive at that magnification and shutter speed.

On Fri, 1 Sep 2006, Doug Franklin wrote:

> ryan brooks wrote:
>
>> I would think that at that kind of focal length you would need a drive to
>> compensate for the Earth's rotation.
>>
>> What shutter speed are you using?
>
> I wouldn't think so at 1/30 or 1/60 near full moon, which is what I
> recall the exposures to have been.  The moon pretty much fills the short
> side of the frame.
>
> -- 
> Thanks,
> DougF (KG4LMZ)
>
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