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Zoom lens for Auto guiding
I have a Sigma 150 -500 zoom lens. I have it piggy backed on my SW ED 80.
I was wondering about the feasibility of using the Sigma zoom as an auto guider lens. To do this, I would need a female Nikon T bayonet - 1.25" female adapter, so that I can mount a guide camera into the end.
Does anyone know whether such an adapter is available?
Many thanks for any advice and Clear skies.
Rob
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