ATM Nut. My builds: 6" f15 Refractor Big GEM mount 12.5" Homemade Newt Projects in the works: 16" F7.2 Reflector
Quote:I started with a tapered paper representation of the light cone i wanted to fold. 6 inches wide at the objective, 72 inches long, comming to a point at the focal plane.
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Refractors Reflectors Two Cats A few eyepieces
Quote:In one word, yes it is too small. One nice feature of a refractor is a wide unvingetted field. You don't want to cut off the light cone, you are wasting aperture. Mirrors tend to be worse at the edges. Best thing to do is, 4 inch mirror and put in a couple of baffles. That way you have an unobstructed light path over the whole field. And, you won't be using the edges of the mirror near COF.