I was recently taken by LBA and bought someone's old Pentax gear. A lot of fun; a perfect Spotmatic, three Super-Takumar lenses (50mm 1.4, 35mm 3.5, 135mm 2.5) and a whole selection of filters, extension tubes, etc.
I did come across something I've never seen online: an attachment that turns an M42 lens into a telescope!
I've looked and looked online for any information, and haven't seen anything quite like it.
It"s quite unusual.
Can anyone help me find more info? Does it have any value? It's amusing, but I wonder if any of you have seen something like this before.
I've scanned the booklet, and attached an image of it with a 135mm on it.