How to construct an aperture stop for a telescope

[kyle_soule]

I need tips on how to slow down a fast telescope. I've heard of showercaps, endcaps, and dustcovers; but what I need are details on how to construct a good quality piece that will stop down the aperture.

 

[mathman]

Try the forums at www.astronomy.net. They are more into telescopes and other instruments than here.

 

[kyle_soule]

Thanks mathman:

I bookmarked that site for future reference.

To answer my question for others, an off-axis mask will do the job nicely. Constructed easily from a 3/4" piece of plywood and a hole. This will (possibly) stop down the aperture which dims objects, but gives them more contrast and sharper images.

It also makes it possible to create a place to "cap" a solar filter on to a large scope without purchasing a large solar filter (expensive).