16inch dobson

This one was around 3000 euro.

I'le pm you the price I got the mirror for Janek .

joner wrote:

The mirror is a fuzed silica quartz that only 3/4" (19mm)thick. I had it made by Mark Cowan of Obsidian Optics. He has it back from coating and it should be ready for shipping this week .

Wow, thats a seriously thin mirror for that size, if it were pyrex you'd have to very carefully design the mirror cell to prevent distortion.

Janek wrote:

It is ready for observation in 10 minutes. It protect mirror and have way better contrast.

Well, every scope has its benifits and pitfalls, I have often found that the shroud on my truss scope induces some sort of tube currents and visiblly reduces the planetary views, but for deepsky, I do leave it on unless its windy.

Dave_Lillis wrote:

joner wrote:

The mirror is a fuzed silica quartz that only 3/4" (19mm)thick. I had it made by Mark Cowan of Obsidian Optics. He has it back from coating and it should be ready for shipping this week .

Wow, thats a seriously thin mirror for that size, if it were pyrex you'd have to very carefully design the mirror cell to prevent distortion.

Janek wrote:

It is ready for observation in 10 minutes. It protect mirror and have way better contrast.

Well, every scope has its benifits and pitfalls, I have often found that the shroud on my truss scope induces some sort of tube currents and visiblly reduces the planetary views, but for deepsky, I do leave it on unless its windy.

Hi Dave.

I'm using an 18 point mirror cell designed with Plop.

I have built the main Uta cage today. I have to build the spider and holder now for the secondary.

I'm building the Dob so the Uta stores inside the mirror box . The rings are 1" wide to help with this.


I'm taking pics and will post a build log as the scope progress's along.

Nice looking scope and reasonably priced.

I wonder what the 20" scope would cost....

Elbi is making one 20" recently, just mirror is 2500 euro...