**Update (18_3_23) Just working on an even shorter design. Just printing now as I type this, which will have a sperate dew shield. *** The support - amended. The base needed a little widening :) Sorry if you already printed, just add a bit of tape, and it'll work just fine :)

This is a test scope. Still a work in progress. However works very well with crisp sharp images. I bought a 'condition - not working - Tamron 70-300mm EF canon lens. Can get them on eBay for between £9 - £18... I got 3 for 9 each. Just take out the front element. Two lens together within the lens holder. Just use that (don't split them, they work very well together. I split them to begin with to see the difference on the focal length. It made the length longer but the colour aberration without the second lens was shocking So I put it back in the black holder.. I use a 24mm eyepiece and also a camera in the eyepiece. Image is very sharp and crystal clear! Hope this works for you as it has for me :)

Grab a lens from an ebay search, condition "for parts - not working" - make sure the glass is ok. Usually the zoom fails and stuff like that. You just need the lens.

Pics to show how it is set up once printed. The focus is obtained by rotating the eyepiece tube. Might be inconvenient for some. But fine with me. Just happy it works. (What the pics don't show is my sanding down and spray painting the inside black and the outsides white. Will uplod pics 'soon'....just hard to get out to do the painting as it feels like it's been raining every day I have off from work since November!