barlow lens for microscope as teleconverter

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   Hello all,
I'm a newbie to this forum from Belgium, Europe, and I have a question.
Did someone ever try to put a Barlow lens of a microscope on a lens (telephoto) to use it as a teleconverter?
I noticed that the front mount teleconverters are referred to as 'Barlow' lenses, and I was wondering: is it possible to do the same with a barlow lens for microscopes?
They seem to have a screw thread of 48mm so maybe this could be fitted with a ring adapter on a lens?
The purpose is to double or triple or even more, the focal length of a telephoto lens in a cheap way.
Any ideas/thoughts on that? People who has a good knowledge of optics?
All the best,
Christopher

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Christopher01 Members Profile Send Private Message Find Members Posts Add to Buddy List Optics GrassHopper Joined: March/29/2022 Location: Belgium Status: Offline Points: 5	Post Options Post Reply Quote Christopher01 Report Post Thanks(0) Quote Reply Topic: barlow lens for microscope as teleconverter Posted: March/29/2022 at 02:35
	Hello all, I'm a newbie to this forum from Belgium, Europe, and I have a question. Did someone ever try to put a Barlow lens of a microscope on a lens (telephoto) to use it as a teleconverter? I noticed that the front mount teleconverters are referred to as 'Barlow' lenses, and I was wondering: is it possible to do the same with a barlow lens for microscopes? They seem to have a screw thread of 48mm so maybe this could be fitted with a ring adapter on a lens? The purpose is to double or triple or even more, the focal length of a telephoto lens in a cheap way. Any ideas/thoughts on that? People who has a good knowledge of optics? All the best, Christopher

Scrumbag Members Profile Send Private Message Find Members Posts Add to Buddy List Optics Master Extraordinaire Joined: October/22/2013 Location: London, UK Status: Offline Points: 4121	Post Options Post Reply Quote Scrumbag Report Post Thanks(1) Quote Reply Posted: March/29/2022 at 02:58
	Hi Christopher, Sorry I can't help with your question directly but welcome to the forum from over the channel in London! Scrummy
	Was sure I had a point when I started this post...

Christopher01 Members Profile Send Private Message Find Members Posts Add to Buddy List Optics GrassHopper Joined: March/29/2022 Location: Belgium Status: Offline Points: 5	Post Options Post Reply Quote Christopher01 Report Post Thanks(0) Quote Reply Posted: March/29/2022 at 04:32
	Likewise! Greetings from Belgium!

Christopher01 Members Profile Send Private Message Find Members Posts Add to Buddy List Optics GrassHopper Joined: March/29/2022 Location: Belgium Status: Offline Points: 5	Post Options Post Reply Quote Christopher01 Report Post Thanks(0) Quote Reply Posted: March/29/2022 at 04:40
	It is also more like an experimental thing actually. I notice that front mount teleconverters, have no light loss, contrary to back mount teleconverters, which I have btw. But it would also be interesting to create a far telephoto lens without a large extension tube for instance. And cheap, that is also the point here.

Christopher01 Members Profile Send Private Message Find Members Posts Add to Buddy List Optics GrassHopper Joined: March/29/2022 Location: Belgium Status: Offline Points: 5	Post Options Post Reply Quote Christopher01 Report Post Thanks(0) Quote Reply Posted: April/12/2022 at 02:32
	I have found a Barlow lens x3 with a T2 mount (I believe, if this equals M42 x0.75 mm). I was wondering: is there some kind of ring adapter to put this on a filter mount of a camera? For instance, one of 77mm? I'm not sure this would give me the desired result, but it would be interesting to try this out. Any suggestions?