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USB borescope/endoscope focus

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alec_t

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The cheapish USB 'scopes I see advertised seem to give reasonably well focussed images of close-up subjects, but what about more distant subjects? I was hoping to use one to give at least fair quality images of subjects at tens of metres range.
 

jpanhalt

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What resolution? Have you considered something like a 200 mm or greater lens on a digital camera?
 

alec_t

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640x480 is what is generally advertised for these and would be ok for my purpose. I need the compactness/format of an endoscope so can't use additional lenses or a normal point-and-shoot camera.
 

JonSea

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I bought one of the endoscopes from Elecrow which looks the same as everyone else is selling.

It's got a tiny focal length. Anything beyond a couple inches is blurry.
 

alec_t

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Ah. Thanks for the info. Looks like I'll have to re-think my project.
 

MikeMl

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I have a dental camera re-purposed to be a bore scope to look at the valve seats in my aircraft engines. I want it to focus at a distance of ~1cm. I recently bought one of $10 flea-bay ones, but haven't tested it yet.
 

Reloadron

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The cheapish USB 'scopes I see advertised seem to give reasonably well focussed images of close-up subjects, but what about more distant subjects? I was hoping to use one to give at least fair quality images of subjects at tens of metres range.
I think you will have a bad time using the terms borescope/endoscope because any camera used for bore or endo is going to be built for up close focus with a limited field of depth. They are built this way by the nature of their use like inspecting a tight bore. Tens of meters is quite a long range. Guessing any of the small web type cameras won't fit the bill for you or the cameras used on the popular drones?

Ron
 

alec_t

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Guessing any of the small web type cameras won't fit the bill for you or the cameras used on the popular drones?
Those would probably do. Or a small dash-cam. Or even a cheapo compact cell-phone. This project is on a back-burner for now, but thanks all for the input.
 
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