[LAW (Murphy)]

I'll be fabricating a tube. Basically the rough plan is to make a 50" tube of four layers of 4x4 in alternate directions, the primary cell will be a sandwich construction of carbon and balsa wood with threaded inserts for the collimation screws. As carbon fibre has a tendency of corroding any metal it touches it will all be installed 'wet' with sealant, which should also help prevent vibration.

I don't know what I'm looking at with Newt Online, the parts I do understand are very informative however. Would someone who knows what they're looking at care to give me some feedback on this setup please?


I don't really understand the vignetting of the 75% ray? The 100% area is almost the same size as the sensor in my 450D so does it matter that the 75% ray is cut off a little?