tag:blogger.com,1999:blog-18395016.post8107153782947698128..comments2022-12-01T01:37:17.965+08:00Comments on orly going thirty: Poor Man's On-Axis Guiderorly_andicohttp://www.blogger.com/profile/09177652962226123898noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-18395016.post-63312897045644782382014-10-11T01:09:33.126+08:002014-10-11T01:09:33.126+08:00Edmund has some "high performance cold mirror...Edmund has some "high performance cold mirrors" which may perform better..<br /><br />http://www.edmundoptics.com.sg/optics/optical-mirrors/specialty-mirrors/high-performance-cold-mirrors/3149<br /><br />ThorLabs has these fused silica cold mirrors..<br /><br />http://www.thorlabs.hk/newgrouppage9.cfm?objectgroup_id=6108orly_andicohttps://www.blogger.com/profile/09177652962226123898noreply@blogger.comtag:blogger.com,1999:blog-18395016.post-58984649411187905232014-09-25T02:03:42.205+08:002014-09-25T02:03:42.205+08:00Hi Steve
Which manufacturers have you checked out?...Hi Steve<br />Which manufacturers have you checked out??<br />I am interested in trying this approach with a different flip mirror.<br /><br />JoseAnonymoushttps://www.blogger.com/profile/16880015470573444543noreply@blogger.comtag:blogger.com,1999:blog-18395016.post-4840882247507245262012-11-09T03:54:22.052+08:002012-11-09T03:54:22.052+08:00The astigmatism was pretty bad with the silicone; ...The astigmatism was pretty bad with the silicone; even after flossing off the large glob of caulk and using a smaller glob.<br /><br />I ended up using 3M Heavy Duty Double-Sided Tape to attach the cold mirror to the mirror holder. This reduced astigmatism in the reflected image to a very small amount - but it's still there.<br /><br />I've since gone back to a guide scope. The shame.orly_andicohttps://www.blogger.com/profile/09177652962226123898noreply@blogger.comtag:blogger.com,1999:blog-18395016.post-80011704697590962522012-11-09T02:45:06.114+08:002012-11-09T02:45:06.114+08:00I think even the 'real' On-Axis Guider by ...I think even the 'real' On-Axis Guider by Innovations Foresight has the 'skateboard' shaped stars in the guider's view, though the imaging camera's ones doesn't. Possibly they have additional coatings on the cold mirror. <br />There are also more expensive cold mirrors from a few manufacturers that might work better, though it would bring the project cost up to about $400.Anonymoushttps://www.blogger.com/profile/10455710050919594913noreply@blogger.com