[ATM] catoptric telescope

[Mircea Pteancu <mirceapte@yahoo.com>]

While I was doing a visit to my friend Attila Csillag (so all the ATM community of the city of Arad,Romania, was in one room) ,he proudly introduced to me his catoptric telescope.This TCT  is of his invention and is using only mirrors.Parameters are :primary dia. 72mm F/10 and eyepiece is still a concave aluminized mirror of 30mm dia. f=80mm.The power of the telescope is about 10x.Outside it was bad wheather so no chance to test the telescope on stars.But I was admiring pits in the walls and the dirt on the windows of the garage across the road with this telescope.No need to insist on the achromatism of the image.There are many other things to comment on, like :why spherical mirrors, restricted field of view,why no sliding eyepiece-mirror  and so on...Anyway it is the first and only visual telescope I ever saw without any lenses.A  picture of the telescope can be seen at:
   
   
   
   
   
  http://www.atmlist.net/contrib/mirceapte-at-yahoo-dot-com/poze%20Laura%20153-copy.jpg
   
  Also ,after greatfully reading the kind replies,I done some material searching and I will come back with a few more questions on my thread ''pinched mirror''.Regards,Mircea

       
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