Anybody knows small size (25 - 33mm diameter), 100-150mm FL tube lens ?
Lots of candidates on the Surplusshed, but their search results look strange, no way to take a look at the item (except very few of them)
Thanks,
Small tube lens
Moderators: rjlittlefield, ChrisR, Chris S., Pau
Small tube lens
Saul
μ-stuff
μ-stuff
Perhaps either AC254-100-A-ML, AC254-125-A-ML, or AC254-150-A-ML, here: Thorlabs Ø1" Mounted Achromatic Doublets, AR Coated: 400 - 700 nm. I haven't tried any lens of this type, but have a vague memory that others may have?
--Chris S.
--Chris S.
Thanks Chris ! AC254-100 is on a way , but only B (close to infrared) version . Any idea, how it will affect picture ?Chris S. wrote:Perhaps either AC254-100-A-ML, AC254-125-A-ML, or AC254-150-A-ML, here: Thorlabs Ø1" Mounted Achromatic Doublets, AR Coated: 400 - 700 nm. I haven't tried any lens of this type, but have a vague memory that others may have?
--Chris S.
Saul
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μ-stuff
- Charles Krebs
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It was ebay listing, cheap price , 100mm, just for proof of concept, how it will cover crop sensor. It was unsuitable at all ? Was it 100mm ? Or it was completely different TL ?Charles Krebs wrote:Saul,
They show the "A" coating as in stock. Why not get the "A"?
I once ordered a "B" coated Thorlab condenser lens by accident, and it was unsuitable for use in the visible wavelengths.
Saul
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- Charles Krebs
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To check for coverage it will be fine.
But the "B" coating reflects too high a percentage of light wavelengths up to about 500nm (see chart and spreadsheet here: https://www.thorlabs.com/newgrouppage9. ... p_id=12767 )
I think you will find it does not give good color for imaging or light transmission, The one I accidentally ordered was a short focal length aspheric condenser lens to be used in a Koehler lighting system.
But the "B" coating reflects too high a percentage of light wavelengths up to about 500nm (see chart and spreadsheet here: https://www.thorlabs.com/newgrouppage9. ... p_id=12767 )
I think you will find it does not give good color for imaging or light transmission, The one I accidentally ordered was a short focal length aspheric condenser lens to be used in a Koehler lighting system.
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Hi,
0.5x focal reducers used for telescopes have a focal length of about 100 mm. Might be worth a try, especially if you have one already.
https://agenaastro.com/articles/guides/ ... guide.html
Not easy to find the focal lengths but this company actually lists them on their pages:
https://agenaastro.com/gso-1-25-0-5x-focal-reducer.html
Regards, Ichty
0.5x focal reducers used for telescopes have a focal length of about 100 mm. Might be worth a try, especially if you have one already.
https://agenaastro.com/articles/guides/ ... guide.html
Not easy to find the focal lengths but this company actually lists them on their pages:
https://agenaastro.com/gso-1-25-0-5x-focal-reducer.html
Regards, Ichty
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I would try achromatic doublets from either Thorlabs or Edmund Optics.
The 25mm/1in versions are very easy to integrate into an SM1 (lens tubes with 1in dia) system. Mitutoyo M Plans actually screw right into the SM1 tubes, though I always recommend adapting it instead. Thorlabs does offer an SM1-M26x0.706 adaptor.
The 25mm/1in versions are very easy to integrate into an SM1 (lens tubes with 1in dia) system. Mitutoyo M Plans actually screw right into the SM1 tubes, though I always recommend adapting it instead. Thorlabs does offer an SM1-M26x0.706 adaptor.
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