Hi Folks
I am building a 10" F5 dob. Using the newt program I keep coming up with minor vignetting on the 75% zone. The cure seems to be to go with a 2" focuser. I would like to keep the secondary at 2 or smaller. Is the minor vignetting a big performance hit or is it going to be liveable. I have a nice vega 1.25 focuser from university optics that I would like to use if possible. Also, the scope that the mirror came out of was using a 1.25 focuser and a 1.8 secondary and
I never noticed anything funky about the image. But using the newt program with the old scope specs would give me the 75% zone vignetting problem. Any opinions?
Thanks, Paul
I am building a 10" F5 dob. Using the newt program I keep coming up with minor vignetting on the 75% zone. The cure seems to be to go with a 2" focuser. I would like to keep the secondary at 2 or smaller. Is the minor vignetting a big performance hit or is it going to be liveable. I have a nice vega 1.25 focuser from university optics that I would like to use if possible. Also, the scope that the mirror came out of was using a 1.25 focuser and a 1.8 secondary and
I never noticed anything funky about the image. But using the newt program with the old scope specs would give me the 75% zone vignetting problem. Any opinions?
Thanks, Paul
