Here’s pictures of the military sighting gadgets I have here. The shorter one is a black-painted brass tube with both a helical focus and a moveable rack-and-pinion adjusted objective, for some reason. Gives an inverted image. No maker name. The other is by REL, Canada, dated 1942. It is a unity power telescope with an extendable objective shield and reticle, gives an erect image, and is a bit lighter than the other one. It looks exactly like a brass bicycle pump.
These gadgets always tend to be too heavy for their optical power to be of any use for astronomy.
- This reply was modified 1 year, 7 months ago by David Arditti.