I have encoders with a 4320 count / revolution overall and after a 2 or
3 star alignment, and maybe some MEC, I usually can land an object on my
camera CCD with a field of view of 12 by 8 arc minutes. It may only just
on but can be seen. This is on a german equatorial mount. The
theoretical resolution is 5 arc seconds.

Kevin Cooper

Bill J Gray wrote:

>Hi Robert,
>
> I've heard from one gent with 8192 count/revolution encoders and a
>Dob mount who, after a bit of playing with MEC, got pointing
>accuracy of a few arcminutes. I dunno how well that represents
>"general" accuracy, but I'd expect it to be about right. He _did_
>have to acquire a couple of dozen stars, as I recall.
>
> I suffer from a lack of data, because not many people have
>actually used MEC. Give it a shot, and you'll see why: it's
>ugly to use. Something I will be remedying...
>
>
>