Bottletopburly Posted February 25, 2023 Share Posted February 25, 2023 I was never going to get collimatooon spot on when the mirror donut not central 🤦♂️ Black dot marks true centre Link to comment Share on other sites More sharing options...
+Bino-viewer Posted February 25, 2023 Share Posted February 25, 2023 Orion Optics UK used to be notorious for doing that. Is that an OO scope ? The primary retaining clips look rather 'OO-esque' One can only conclude that putting the 'donut' bang on centre is not as straightforward as one would think....? Thinking about it, if i tried to do it myself, i'm sure i'd make a pigs ear of it. Link to comment Share on other sites More sharing options...
Bottletopburly Posted February 26, 2023 Author Share Posted February 26, 2023 9 hours ago, Bino-viewer said: Orion Optics UK used to be notorious for doing that. Is that an OO scope ? The primary retaining clips look rather 'OO-esque' One can only conclude that putting the 'donut' bang on centre is not as straightforward as one would think....? Thinking about it, if i tried to do it myself, i'm sure i'd make a pigs ear of it. Hi rob no it’s only a skywatcher 200pds, apparently a cotton bud soaked in nail varnish will remove it , recentering I don’t see a problem as you usually squirt water on the surface first and that should give a bit of time to centre into position, just need to find a replacement ,Flo did sell catseye centres but showing unavailable so will have a google today and see what’s about . Link to comment Share on other sites More sharing options...
Bottletopburly Posted February 26, 2023 Author Share Posted February 26, 2023 Ah paper reinforcement rings available from WHSmiths or most stationary shops 😁 Link to comment Share on other sites More sharing options...
+Bino-viewer Posted February 26, 2023 Share Posted February 26, 2023 I'm surprised nowadays they don't use a laser etched dot to mark the centre ? A lot of RC and DC type scopes mark the secondary this way too to aid collimation. How about a small blob of Mercury ? I think that would be better than a drop of water...? Or am i overthinking things a bit....?? 😄 Bottletopburly 1 Link to comment Share on other sites More sharing options...
Bottletopburly Posted February 26, 2023 Author Share Posted February 26, 2023 (edited) 12 minutes ago, Bino-viewer said: I'm surprised nowadays they don't use a laser etched dot to mark the centre ? A lot of RC and DC type scopes mark the secondary this way too to aid collimation. How about a small blob of Mercury ? I think that would be better than a drop of water...? Or am i overthinking things a bit....?? 😄 I will get a paper ring for now though I may invest at some point in a Catseye system you would think the central spot would be bang on seems Qc no better at synta factory these days Edited February 26, 2023 by Bottletopburly Link to comment Share on other sites More sharing options...
Bottletopburly Posted February 26, 2023 Author Share Posted February 26, 2023 1000 clear vinyl punch hole reinforcers for £3 ish +Bino-viewer 1 Link to comment Share on other sites More sharing options...
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