Tangerinedream Posted February 14 Share Posted February 14 Hi all, I made a big u turn on my visual setup and decided in the end to opt for a Bresser Messier 10" Dob as they were on offer from Bresser UK. Having now received it I have inspected the primary mirror using the "flashlight test" to check the coating. To my suprise I found it to be scattered with holes of light shining through! As this is a brand new scope am I correct in thinking this is a poor quality mirror and return it? I've emailed Bresser UK but awaiting a response. +Glafnazur 1 Link to comment Share on other sites More sharing options...
Tangerinedream Posted February 14 Author Share Posted February 14 Link to comment Share on other sites More sharing options...
+RonC Posted February 15 Share Posted February 15 That doesn't look right! Is there a protective covering? Link to comment Share on other sites More sharing options...
+Bino-viewer Posted February 15 Share Posted February 15 I looked at this last night, but 12 hours later and thinking about it, I still can't figure out whats going on. Sorry i can't be of more help. Link to comment Share on other sites More sharing options...
+Streetbob Posted February 15 Share Posted February 15 It doesn’t look right to me. If you are not happy with it I would return it, even if you’re told it is okay. Link to comment Share on other sites More sharing options...
Tangerinedream Posted February 15 Author Share Posted February 15 Bresser customer service have been good to deal with so far. They are awaiting a response from the head of astronomy at Bresser. Hopefully they can just exchange the primary mirror as sending the whole thing back is a bit of a faff. From what I understand there is an aluminium coating on the primary and it looks as though there are flaws in the coating application. Over time the coating will degrade anyway so from new this isn't good really. Will see what Bresser has to say. +Streetbob 1 Link to comment Share on other sites More sharing options...
+RonC Posted February 15 Share Posted February 15 Keep us in the loop Josh... Tangerinedream 1 Link to comment Share on other sites More sharing options...
Tangerinedream Posted February 15 Author Share Posted February 15 13 minutes ago, RonC said: Keep us in the loop Josh... Will do. I'd be sad to send it back as the Dob itself is very well made and operates smoothly. Link to comment Share on other sites More sharing options...
Popular Post Tangerinedream Posted February 15 Author Popular Post Share Posted February 15 Good news! They have agreed that the mirror is flawed and are sending me a direct replacement mirror. Very impressed with their customer service. philjay, +Glafnazur, +Ibbo and 3 others 6 Link to comment Share on other sites More sharing options...
+RonC Posted February 15 Share Posted February 15 That's great news, are you OK replacing the mirror? Link to comment Share on other sites More sharing options...
+Streetbob Posted February 15 Share Posted February 15 Good news Link to comment Share on other sites More sharing options...
tuckstar Posted February 16 Share Posted February 16 That one slipped through qc. Glad they sorted if for you. Link to comment Share on other sites More sharing options...
Tangerinedream Posted February 16 Author Share Posted February 16 16 hours ago, RonC said: That's great news, are you OK replacing the mirror? Haven't done one before but doesn't sound too bad. Is there anything I should be aware of other than marking orientation and not overtightened screws? Link to comment Share on other sites More sharing options...
+RonC Posted February 16 Share Posted February 16 Just cleanliness! ☺️ Link to comment Share on other sites More sharing options...
Tangerinedream Posted February 16 Author Share Posted February 16 1 hour ago, RonC said: Just cleanliness! ☺️ Nitrile gloves will probably be a good ideal then Link to comment Share on other sites More sharing options...
Tangerinedream Posted February 26 Author Share Posted February 26 So unfortunately, I returned the Dob in the end as storing it away from little hands proved to be difficult! In praise of Bresser though they provided an excellent service with sorting out the faulty mirror. Now going back to my original plan of 4" refractor grab and go setup that can be stored away more easily and securely.... Link to comment Share on other sites More sharing options...
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