iOptron iGuider 1

[MillHey Nebula]

Does anybody have any experience of using this guide scope ?  If it works well, it is a very attractive proposition: the total weight is only 200g and it attaches directly to a CEM26 mount.  This would give me a fighting chance of squeezing a 4.5 inch refractor onto that mount.

[michael8554]

The spec says for guiding "short to medium length scopes".

You might find that the 6.44arcsec/pixel image scale a bit too large to guide a 750mm FL ???  scope.

Michael

[MillHey Nebula]

I was thinking of around 650mm, by the time I had a field flattener in place.  Would that still be too long for the guide scope?

[michael8554]

I was missing out some of the fine detail.

Whatever your imaging scope FL, if that image scale is about the usual 1arcsec/pixel, I'd say that 6.44arcsec/pixel is too much.

If it was 2arcsec/pixel, which might be considered undersampling, the ratio is about right.

But this is probably going to open the usual arguments about image scale, and about guide ratios.

Michael

[MillHey Nebula]

Thanks for that, very useful.  There is so much to get my head around at the moment!

[MillHey Nebula]

Based on your comments and more Internet research, I decided to go for a Starwave 50mm guidescope. A bit more ingenuity needed to attach to my current set up, but should see me through a couple of upgrades.

Edited May 6, 2021 by MillHey Nebula
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