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Looking for someone who understands optics

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(@squowse)
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I'm trying to fit a small CCD (digital camera) to the eyepiece of a total station (Leica 1200 at the moment).

I was hoping I might be able to remove the eyepiece of the total station and directly attach the camera

(Raspberry Pi 8MP) to the hole.

pinoir v2

)

Not sure if I could make it focus correctly with or without the camera lens (removable)?

I will be experimenting but wonder if anyone can advise or point me in the direction of a good resource so I can understand what I need to do.

 
Posted : 11/02/2018 4:13 pm
(@bill93)
Posts: 9834
 

Your camera would have to focus to very close range and it probably doesn't without help.?ÿ An eyepiece has an effective focal length on the order of a cm or two.?ÿ You need to focus on the crosshair reticle (if that isn't part of the eyepiece assembly) and the virtual image of your target in the space inside the telescope tube.

Can't you make something that fits over the eyepiece??ÿ Then you could focus in the range the camera expects.?ÿ That would avoid opening up the telescope to contamination.

 
Posted : 11/02/2018 5:59 pm
(@paden-cash)
Posts: 11088
 

The eyepiece is a necessary component of the instrument's telescope.?ÿ Simply put; you remove the eyepiece - you remove the upright focused image.?ÿ

I'm just a simple guy.?ÿ My suggestion would be to get some tape and popsicle sticks and mess with it to see what results you get.

 
Posted : 11/02/2018 6:25 pm
(@richard-imrie)
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??? with (or without) the light ???

https://www.amazon.com/Bestsight-Flashlight-Riflescope-Outdoor-Hunting/dp/B07688GWZM

 
Posted : 11/02/2018 6:39 pm
(@squowse)
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Posted by: Bill93

Your camera would have to focus to very close range and it probably doesn't without help.?ÿ An eyepiece has an effective focal length on the order of a cm or two.?ÿ You need to focus on the crosshair reticle (if that isn't part of the eyepiece assembly) and the virtual image of your target in the space inside the telescope tube.

Can't you make something that fits over the eyepiece??ÿ Then you could focus in the range the camera expects.?ÿ That would avoid opening up the telescope to contamination.

This may be what I have to do. I know you can get a photo through the eyepiece of a total station with a phone camera. But a bit of tunnel visionnon the ones I have seen.

I need to keep the amount it sticks out small so it can change faces. I have thought maybe though I can take the handle off an make sure the eyepiece passes over the top.

When looked into it how astronomers connected cameras to their telescopes there were quite a few options including "prime focus" where the telescope eyepiece and the camera lens were removed. The telescope then projects directly onto the ccd.

Another reason I would like to use this method if possible is to avoid the distortion of the cheap camera lens

?ÿ

?ÿ

 
Posted : 11/02/2018 7:31 pm
(@squowse)
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Posted by: paden cash

The eyepiece is a necessary component of the instrument's telescope.?ÿ Simply put; you remove the eyepiece - you remove the upright focused image.?ÿ

I'm just a simple guy.?ÿ My suggestion would be to get some tape and popsicle sticks and mess with it to see what results you get.

Yes I'll be having a bit of an experiment. I don't mind if the image is upside down or even if the cross hair is missing. Just need a focussed image over normal distances and ideally slightly smaller field of view than would be seen by the human eye. I feel sure there must be a way with the right arrangement. I am wondering if another lens instead of the eyepiece would help.

Will use a bit of blutack and report back.

 
Posted : 11/02/2018 7:35 pm
(@squowse)
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Thanks Richard but I want to sight through the scope and turn both faces

 
Posted : 11/02/2018 7:38 pm
(@squowse)
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The scope camera looks a bit builky amd the images are for processing by the computer so the small raspberry pi one is ideal. Maybe I could use it as a research avenue though. Someone is bound to have diyed night vision for a gun scope or telescope.

 
Posted : 11/02/2018 7:41 pm
(@paden-cash)
Posts: 11088
 

Just as a side-note here...

I guess I'm a little surprised there isn't an already developed theodolite style TS or instrument with nothing but a display screen and no "eyepiece".?ÿ Maybe next year??ÿ

 
Posted : 11/02/2018 7:52 pm
(@richard-imrie)
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Here's one I made last year:

Trimble SX10 Working
 
Posted : 11/02/2018 8:10 pm
(@squowse)
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ha! the sx10 could be ideal for what I am trying to do but the resolution of the telescope?ÿ camera is just too low.

also the price is a lot more than i am hoping for.

trying to get it to monitor retro reflective targets.

 
Posted : 11/02/2018 9:18 pm