I ground the travelscope mirror down to F/4 and put it in a Newton for rich field viewing and photography.
The new and current mirror is borosilicate 255F4.
A Kutter design schiefspiegler with toroidal primary mirror. Performance appeared not good enough, so now this has been redone with spherical primary and secondary. The Secondary should one day be torodized.
||Corrected Dall-Kirkham 300F8|
I have been playing with Cassegrain type of scope design since the Gregorian I built.
Now I found a promising recipy for a Dall Kirkham with a corrector based on off the shelf commercial lenses.
||Surplus Shed Maksutov|
Every now and then Surplus Shed has a Maksutov optics set in stock. I acquired one of these and built a quick scope from it.
See also the discussion on Cloudy Nights.
||Rich Field Telescope 150F4|
I made this Q&D scope because the Mk-I travelscope was taking too long (7 years).
The mirror finally made it to the Gregorian.
Built to experiment with this design, intended for watching moon and planets.
It is 150mm, F/24 (I re-used the RFT mirror).
I had this old Vixen tube and a piece of soda lime glass... (120mm, F/7.5)
My first attempt at a hand-luggage transportable scope (250mm F/6.3 soda-lime), started in 1999.
Rebuilt in 2007, decomissioned in 2014 (mirror re-used for F/4 Newton).