extension tubes?

[northcanadian]

Hi folks:

If an empty barlow can be inserted between the barlow/powermate and the ccd camera for increased image scale......what are the limitations? Can longer extension tubes be used? Thanks

Cheers

Roger

[Merlin66]

Roger,

The barlow extension will work with conventional barlows - not with powermates.

In theory there's no limit, but if you are looking for "extreme" amplification then doubling up barlows or eyepiece projection is the way to go.

HTH

[emadmoussa]

Standard barlow should work, such as the cheap Skywatcher 2x barlow normally provided with the telescope upon purchase.

[JamesF]

Yes, it works fine. Before I had the ASI120MC (which has smaller pixels and therefore doesn't need such image scale) for planetary imaging I used to use a 2.5x barlow, a 40mm extension made from a Skywatcher kit barlow with the lens removed and then my SPC900 camera.

James