Tweedledee Posted March 29, 2016 Share Posted March 29, 2016 This is a 28" F2.75! No ladder needed. The owner must be a collimation expert ... stash 1 Link to comment Share on other sites More sharing options...
Daz Type-R Posted March 29, 2016 Share Posted March 29, 2016 Good grief. I bet a mouse fart would knock it out of collimation. Link to comment Share on other sites More sharing options...
Perkil8r Posted March 29, 2016 Share Posted March 29, 2016 Never mind the length, feel the girth...... BAZ 1 Link to comment Share on other sites More sharing options...
catman161 Posted March 30, 2016 Share Posted March 30, 2016 Bet the views are mind blowing! Link to comment Share on other sites More sharing options...
+Bino-viewer Posted March 30, 2016 Share Posted March 30, 2016 You have to admire the engineering with something like this. Imagine how difficult it would be to produce a mirror like that Link to comment Share on other sites More sharing options...
+Bino-viewer Posted March 30, 2016 Share Posted March 30, 2016 (edited) But then, with that focal ratio, and with a focal length of 1925mm? unless he's got eyes like an owl, he'd be pushing it with anything over 13-15mm from an eyepiece point of view. Even a 13mm Ethos would give 148x magnification. Thats not taking in to account a Paracorr, which adds to focal length. Thats high power for me. I wonder what eyepieces & accessories he / she uses ? Is there a link to a review etc Pete ? Edited March 30, 2016 by Bino-viewer Link to comment Share on other sites More sharing options...
Brantuk Posted March 30, 2016 Share Posted March 30, 2016 There was a 32" version of this scope at Kelling last autumn - only three pitches down from us. Liverpool astro soc brought it along but the daft numpties left the connecting ring for the top box at home tut! They did botch some kind of connection up but I never got chance to get near it at night time it was either being adjusted, or just too darned popular when working. Link to comment Share on other sites More sharing options...
Tweedledee Posted March 30, 2016 Author Share Posted March 30, 2016 That was a 30" F3 Kim. I think the 28" F2.75 is the shortest so far commercially made. Will try to find some more info when I get home. Link to comment Share on other sites More sharing options...
Doc Posted March 30, 2016 Share Posted March 30, 2016 Here's a few links. 14.5" F2.55 28" F2.7 40" F3 Link to comment Share on other sites More sharing options...
+Bino-viewer Posted March 30, 2016 Share Posted March 30, 2016 The 40" F3 Mick weighs in at 280Kg ! Could be tricky to set up at Belper.......certainly if you're on your own ! Yay........!!!!! 1000 posts Do we get anything for this milestone..... catman161 1 Link to comment Share on other sites More sharing options...
Tweedledee Posted March 30, 2016 Author Share Posted March 30, 2016 That 40" F3 is fantastic Mick Now we know why Micks workshop is so massive Congratulations Rob. Link to comment Share on other sites More sharing options...
Doc Posted March 30, 2016 Share Posted March 30, 2016 (edited) I wonder how much a 40" mirror costs at F3 No prizes Rob just a pat on the back. Edited March 30, 2016 by Doc Link to comment Share on other sites More sharing options...
BAZ Posted March 30, 2016 Share Posted March 30, 2016 (edited) That's one heck of a scope, but can you imagine the view through it. Ah well we can but dream. Well done on the 1K Rob, here's to many more. Edited March 30, 2016 by BAZ Link to comment Share on other sites More sharing options...
Tweedledee Posted March 31, 2016 Author Share Posted March 31, 2016 That 40" gathers as much light as sixteen 10" scopes You'd probably lose your dark adaptation looking at some of the brighter galaxies! Link to comment Share on other sites More sharing options...
Rusty Strings Posted March 31, 2016 Share Posted March 31, 2016 Maybe Graham would knock one out after he's finished that piddling small one he's doing now Tweedledee and BAZ 2 Link to comment Share on other sites More sharing options...
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