Hello Shane, I was thinking of adding lens control to the camera, but then I realized that with the 2.2 um pixels (and the modern sensors have even smaller ones) the usable aperture adjustment is very limited because of the diffraction - the maximal F# is just the ratio of the pixel size to the light wavelength, so in our 5MPix cameras it is about 3.5. If you close more - the resolution will be degraded. On the other hand - it is a strong side of the electronic rolling shutter sensors - there is no penalty for going to very short exposure time (something common for global shutter CCD and CMOS sensors).
So I would not recommend using of any motorized iris lenses, they woulld provide little if any benefit, while degrading the image sharpness. Andrey ---- On Sat, 13 Oct 2012 18:32:39 -0700 Shane Sanford<[email protected]> wrote ---- I have a outdoor application were we think we need a auto-iris lens with our Elphel camera. Is there a existing relatively inexpensive solution for controlling the lens using the Elphel camera? After doing some looking around I have not found anything that fits the bill but before I go and try to reinvent the wheel I thought I would ask to make sure there was not a obvious solution I was overlooking. My current plan is to build a circuit interfaced to a arduino and connect to the camera in the case of the NC353L-369 camera or if we end up going without the 10369 board then use a netduino (or arduino with a network shield) and communicate via the network. Input would be appreciated! Shane _______________________________________________ Support-list mailing list [email protected] http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
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