Originally posted by polarathene
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If you check what that mod maker is recommending in lens you find this one with a 3MP rating. Yes for the full 4k logitech-brio and its tested that make of lens and it works.
You will find others around with 1 and 2MP rating stuff on 4K sensors. RPi lens is not that far out the ball park really just the ratings on CS/C/M12 lens that are MP are basically always wrong question is how far under.
Other reason why I don't mind CS as the fitted lens mount is this. So M12 can be used in a CS mount just like C lens can be used in a CS mount with adaptor. CS mount allows you to use the most lens without needing to be changing the mount. Changing the mount you risk damaging the sensor every single time. Do be aware M12 to CS adaptor here also has the locking grub screw on the M12 that can result in getting the M12 stuck in the adaptor for good.
CS mount is basically you best choice if you are going for cheap changeable lens. Just make it a really good CS mount so you are not getting lens stuck in it.
This is one of the reasons why I don't see the RPI HQ camera piece as too expensive. Few times having to change the CS/M12 mount because you locked the back focus by a grub screw and the lens now would not come out is nightmare when you consider you are now changing the full mount on and off every-time you want to use that lens and change back to another lens for now on and its locked only to that sensor because its only correctly focused for that sensor. 50 dollars alone for a well designed CS mount is kind of worth it over time not to have those troubles if you are going to be using the camera with more than 1 lens/device.
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