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By Cosmic Geoff
One ADM saddle, from a kit for a Meade RCX 12. New and unused, finished in black , with three threaded holes and two slotted fixing holes, seems to fit a diameter of approx 37cm. £10 o.n.o, postage £3.00
One 150mm internal diameter tube ring, used, painted grey, appears to have had a soft lining, now removed. £5 o.n.o, postage £3.00
Hi there, could someone please provide depth and thread pitch for the front cell screws on an 8" Edge HD, as in the empty socket portrayed in the attached photo:8" Edge HD, as in the empty socket portrayed in the attached pho
Hi, I was hoping someone could answer a question that has just popped into my head?
I am thinking about getting an imagemate or powermate barlow for my planetary imaging using a webcam and for nebulae like M57 using my DSLR and suddenly thought, "where is the best place to put a filter in this stack?"
Would it be best on the nose piece of the barlow or would it be better to keep it closer to the image plane and fit it to the nose piece of the camera? Or does it not matter.
My thinking was that if you have any problems with the filter scattering light it would be worse fitted to the barlow, but then if you had dust on the filter it would be so blurred by the time it reached the image plane it probably wouldn't notice. These problems being reversed if the filter was screwed to the nose piece of the camera. Or am I way off base again?!?