ke5492 (December 31, 1969 at 5:59 pm)

To joshig1983 - it is hard to do, but I am trying to parabolizing the miror because it is f:4,5. I think I have to try one more time.Tricyklist recomend me to grind with the tool on top. I think he is right.

Tricyklist (December 31, 1969 at 5:59 pm)

The reason your mirror did not polish right out to the edge is because your lap facets did not reach the edge of the tool. Working with tool regularly on top would have helped to polish the mirror to the very edge. The mirror will still work very well with only a small lost of contrast if the figure is okay. Enjoy your telescope and your superb dome.

joshig1983 (December 31, 1969 at 5:59 pm)

If you are using a Newtonian optical system, the mirror is supposed to be parabolic in shape. If you use a really long focal ratio like over f/8, you can get away with a spherical shape without too much loss of resolution due to spherical aberation. If you didn't make a telescope before, it takes some handy work. Start with buying all the parts premade. If you really want to make the mirror, it helps to have a scope ready as a test bed for your new mirror.

Anvilcjl (December 31, 1969 at 5:59 pm)

Peshmarga, the mirror is curved. the larger the mirror, the harder it is to get it curved perfectly. It's quite a project and you'd really have to know what you're doing.

morocco214 (December 31, 1969 at 5:59 pm)

the mirror for the telescope is a special and it is hard too make a one the mirror in the ke6492 telescope it is from a telescope you have to buy a telescope

peshmarga19 (December 31, 1969 at 5:59 pm)

hey ke6492 can i askhow do you haved make the mirror for the telescope? is that a special mirror or a normal?im trying to make one n my own but i just need a mirrori hope i get an answer back soon greetings

mijnvideos (December 31, 1969 at 5:59 pm)

Great looking scope , well done .

klaus5492 (December 31, 1969 at 5:59 pm)

Thanks to Francis for your comment, I have seen some of your videos on youtube, they are very great and I will recomend them if anybody planed to make their own mirror.Thanks to fnherstalpatriot and bankeh for yours comments too.

klaus5492 (December 31, 1969 at 5:59 pm)

This is a test post-video

foreilly1958 (December 31, 1969 at 5:59 pm)

This is a great video. Your workmanship is excellent. The ring around the edge of the mirror is due to insuffucuent polishing. Thank you for sharing this video.Francis J. O'Reilly