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Another spider question

Started by Vince, 05/27/2006 01:57PM
Posted 05/27/2006 01:57PM Opening Post
I have just received my 18" OMI-Torus mirror. This is the first attempt at building a scope. I was looking at ProtoStar for the spider. They will add the offset for the secondary into the spider with asymmetrical vane lengths. Now with the problem of diffraction spikes, will this make them fainter since the offset vane pattern is not lined up or will this make 8 spikes?
Posted 05/27/2006 08:22PM #1
Now with the problem of diffraction spikes, will this make them fainter since the offset vane pattern is not lined up or will this make 8 spikes?

You will still have 4 spikes. They will not be any brighter
or fainter, just slightly different.