Yes, there are sometimes reflections from the inside of the cone that cause loss of contrast. How bad they are depends on the particular cone and objective. Most people cover the inside of their cone with a black flocking material of some sort. Even just painting it flat black can help a lot. Another approach is to mask the reflections by cutting a piece of black paper to fit inside the cone, with a hole in it just big enough to let the sensor see the back of the objective and not the sides where the reflections occur.hayath wrote:Happened to read that the RMS to M42 cone causes some light issues which affects IQ -> contrast
Would that be true? If yes, any way of handling that?
--Rik