KirkD Posted March 12 Share Posted March 12 I was installing the dew heater ring on my new Celestron 9.25 when I noticed that the inside surface of the front corrector plate has a film on it. I don't know if it is an oily film, or smoky or what but it is splotchy and uneven and even has a factory fingerprint on it. There are a few whitish spots that might even be fungus (see photos, but ignore the multitude of tiny spots-those are on the outside and are from dried condensation). I contacted Celestron about this and they said they would clean the inside surface of the corrector plate and emailed me a pre-paid UPS ticket to send it from my place in Canada to Califonia. I don't even want to think about packing the tube up in a way that will give it safe passage so I have some questions: To install the dew heater ring, there were six or seven screws I removed, and it looks to me that if I removed those screws again and the heater ring, the front corrector plate should just lift out (there are some tiny nylon pegs that I assume are for positioning but I don't think they do any restraining from lifting out). Am I correct about the ease of lifting out the corrector plate? Option One: would be for me to clean the inside of the glass myself. I don't know if it is multicoated but I'm also a photographer and know how to clean lenses without damaging the coating. Is there anything I should know before attempting to clean the inside of the plate? Option Two: Just send the corrector plate to Celestron. They do say to remove any unnecessary equipment or parts and I figure the tube is one of those unnecessary parts (I'll have to do my own collimation when I got the part back). I'd much rather go with option one unless there is some tricky stuff about doing my own cleaning. 1 Quote Link to comment Share on other sites More sharing options...
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