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jbeale
Posts: 3902
Joined: Tue Nov 22, 2011 11:51 pm

v2.1 camera with microscope objective as lens

Mon May 16, 2016 2:05 am

When is a 4x microscope objective a telephoto lens? When you mount it in front of a 1/4" image sensor... (RPi v2.1 camera). I 3D-printed a holder to mount the objective facing towards the image sensor. It has usable resolution, at least near the center of the frame. Might work better with a different objective, this was a very cheap one: AmScope 4X Plan 4/0.10 160/0.17 http://www.ebay.com/itm/381613828736

The tops of the "T" marks are 18 cm apart, and the target is 9.6 meters away. This is a 1:1 crop from the RAW output.
Image

Image

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Gavinmc42
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Joined: Wed Aug 28, 2013 3:31 am

Re: v2.1 camera with microscope objective as lens

Mon May 16, 2016 2:29 am

Thanks jbeale,

Just solved a problem for me.
Telephoto lens for Pi's are not easy to get.
Microscope Objectives, no problem, they get thrown away here:)
Got four 10X on desk now, waiting for weekend, go though the junk boxes I will probably find more.
Got to get myself a 3D printer, love that mount.
Time to get the rust off my CNC mill and grab some black delrin.
I'm dancing on Rainbows.
Raspberries are not Apples or Oranges

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jbeale
Posts: 3902
Joined: Tue Nov 22, 2011 11:51 pm

Re: v2.1 camera with microscope objective as lens

Mon May 16, 2016 3:26 am

If it's of any use, here's the simple mount design I did. If you look at the OpenSCAD file file you can type in a different value for the objective OD and have it fit some other objective, so long as it is cylindrical and has enough working distance to reach focus at the sensor.
http://www.thingiverse.com/thing:1565909

The 4x I used is a super-telephoto, about 8 degree HFOV on this sensor. A 10x might be more useful, as long as it has a large enough field of view to cover the sensor.
Last edited by jbeale on Tue May 17, 2016 11:33 pm, edited 1 time in total.

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Gavinmc42
Posts: 6616
Joined: Wed Aug 28, 2013 3:31 am

Re: v2.1 camera with microscope objective as lens

Mon May 16, 2016 4:06 am

Holding some white card up to the eyepiece.
I get an image from out the window about 15mm wide at ~10mm focal point.
So about 3x zoom?
Using the middle 1/3 of the image/lens probably not going to get much distortion.
With 22mm dia going to get heaps of light.
Night times shots?
I'm dancing on Rainbows.
Raspberries are not Apples or Oranges

mosayeb21
Posts: 1
Joined: Fri Apr 07, 2017 8:25 am

Re: v2.1 camera with microscope objective as lens

Fri Apr 07, 2017 8:29 am

Hi
Can I use a 1/2.5" lens for V2 camera like the lens in below link:
https://www.m12lenses.com/6-0mm-F1-6-3- ... 16b3mp.htm

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jbeale
Posts: 3902
Joined: Tue Nov 22, 2011 11:51 pm

Re: v2.1 camera with microscope objective as lens

Fri Apr 07, 2017 3:39 pm

The mount I made fits only that particular microscope objective.

Your link is a M12 thread lens. You should be able to use any such M12 lens if you use a M12 lens mount like http://www.thingiverse.com/thing:1963856

TheMatrix1010
Posts: 1
Joined: Thu Jul 20, 2017 6:03 am

Re: v2.1 camera with microscope objective as lens

Thu Jul 20, 2017 6:09 am

Hello,

Is possible to provide 3D file for printing M12 lens mount please?

Thanks,
Bertrand.

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