ASI 120mm nosepiece filter?

[northcanadian]

Hi folks:

Just wondering what would work to help keep the dust off the camera sensor...clear glass, or....?  I have a UV/IR cut filter and a Celestron UHC/LPR filter #94123 and wondering if one of those would work or would it interfere negatively with the RGB filters???

Thanks again

Roger

[D4N]

The 120mm has a clear glass window before the sensor, there should be no need to protect that.

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[JamesF]

The older models don't have any optical window, though it is (or used to be) possible to buy one from ZWO.  Otherwise I'd probably use an IR or IR/UV cut filter if it's just for planetary imaging.

James