Got out a couple of nights back to fire up the 200mm lenses and the 2600MC Pro CMOS cameras. If you remember in the last outing it looked like there might be water vapour in the optical system. So in the intervening time I was a lot more diligent in keeping the dehumidifier up and running and empty of water. I also took the opportunity to remove the UV/IR cut filters and replace them with the Optolong L-Enhance filters. I fired the system up and was amazed that the water vapour had disappeared – YAY!!!! However, as always happens with a filter change, I now have to re-collimate both systems. Plenty of up and coming Moonlit nights to be getting on with that so long as it is clear.
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