Posts Made By: William Mills

Hello Jeff,

I have not had much experience with Discovery, but everything I have read, heard, etc. says the optics are about the same. I have a fast Newt from Orion, and it has sharp optics. As for the focal length, it really depends on your viewing preference. If planets, lunar, double stars are your preference, longer is better. If deep space is what you look at, then a shorter scope gives wider views for nebula, clusters, and galaxies. Keep in mind, that the shorter the focal length, the more aberrations creep in. However, this is not as much of an issue on deep space. Hope my ramblings help.

Regards,
Bill

Hello Emmanuel,

I have been using a C5 for about six months as my quick look scope. On average, I would estimate that it takes about 30 minutes to acclimate to a usable level. Having never used a wide field refractor, I can only comment on the SCT. I enjoy the C5 because it has a focal length that will allow good planetary, lunar and solar viewing, as well as having enough light gathering for deep space. I use mine on an AZ-3 mount, and it is a great set-up for spur of the moment viewing. Hope my rambling helps.

Regards,
Bill