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leswright1977 / PySpectrometer

Raspberry Pi Spectrometer
Apache License 2.0
662 stars 105 forks source link

Suitable camera lens #9

Open mrernos opened 3 years ago

mrernos commented 3 years ago

First of all, great project!

Currently I'm running a similar setup as the one shown in your youtube video (using the same spectroscope). I've tried a random camera lens I already had for the Raspberry HQ cam, but the resulting images are really blurry.

I don't know much about camera lenses, but I think you would need a lens with a very short focus length to get an accurate image. Do you happen to know the technical specs of the lens you used? Much appreciated!

leswright1977 commented 3 years ago

I used a zoom lens with the following specs: 1/3" 9-22mm IR Sensitive Manual Zoom M12 Mount CCTV Lens F1.6

I zoom almost all of the way in, and focus. I suspect the focal length is maybe as high as 18mm. I have fixed focus lenses on order, that I will be testing when they arrive.

mrernos commented 3 years ago

Thank you for your response. I ordered a similar lens based on the specs you posted (it will be delivered from china, so this will take a while). I will post some results once I get it in my hands!

mrpackethead commented 3 years ago

My spectroscope arrived last week, and i'm waiting on some lenses to arrive..

DO we have to use a Raspberry PI camera.. Could i use a usb camera? It might make for a lot more options..

I have one of these arriving, and have both the 2.8 - 12mm and the 5-50mm lensess.. A lot of pixels and hopefully one of the leneses works really well.

http://www.elpcctv.com/elp-sony-imx317-4k-uvc-usb-webcam-with-cs-550mm-varifocal-lens-elpusb4khdr01mfv-550mm-p-182.html

leswright1977 commented 3 years ago

You can use any USB camera (I did not use the picam library, just the standard video lib). So long as it is the first camera on the system, it will be fine. (Note: I have not tested all USB cams, just a couple! Do report back!)