[mental4astro (Alexander)]

Because the black CF is seen as been "sexy", and that is how it is marketed with its black aspect, plain and simple. It is somehow implied that because the tube is made from CF that it is somehow "better", but no one seems to ask how or why, and mostly this comes out of not knowing any better - and being "stronger" is how stronger?

Putting less strain on optics? It is ONLY the tube that is CF. The primary's cell is the same alloy one. ALL cells are designed to be passive. CF or metal makes no difference here. None.

Which would sell more, a black CF tube with the snazzy CF woven mat look, or a plain white CF tube? The plain white CF tube would get passed over only because of the look, regardless of the thermal advantages it presents. If it really was anything else, then white CF tube would be also offered. That's human psychology...

A lot of money is spent in the marketing departments of big corporations, and this includes working out what colours to use for their scopes. This is entirely a visual exercise. Nothing else matters because people on the whole just don't know any better. With amateur instruments, the prime driver is selling units.

Professional instruments are not designed or built by astronomers. Rather these instruments are designed and built by teams of engineers, technicians and opticians whose job is to know all of these factors and many, many more, and to present the keys of the finished product at the end. With amateur instruments, the prime driver is selling units.