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extension tubes?


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Hi folks: :rolleyes:

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

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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

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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

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