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Completed in 2014, the journey from adjusting both mirrors at every session for 5 years to just the primary mirror twice a year has been very rewarding, mainly by eventually regarding the Newtonian 'telescope's 45° secondary mirror lateral adjusters as handlebars. Turning them without laying a bike over causes the rider to fall off by inertia. Similarly, adjusting these two bolts results only in distortion of a different shape. Attempts to compensation then follow, whereas the instructions chapter from the 3rd edition keeps one well clear of getting nowhere with fast optics. Support by like minds was found subsequently in Norton's Star Atlas* 11th to 15th editions from 1950 p.50. Then on the internet from around the millennium there's the metalwork of R.F. (Bob) Royce in 'The Ultimate Newtonian,' Conrad Hoffman's secondary mirror 'Taming the dastardly thing,' and in Sky & Telescope Oct. 2010 you'll find Ed Jones's Tracking Travelscope also preventing falling into wrong instructions. They either don't fit the lateral bolts or they lock them into strictly following the axial one, thereby steering instructions into the procedure I have developed independently without metalwork.
One of the various tools for aiding initial alignment can be all that is needed for slow optics and low magnification use. They include the Cheshire Eyepiece, the fascinating Easy Tester 11 and there's a computer program for completing the indoor centring. A Fuji 35 mm film canister does it with a wider and clearer view. Where is the laser collimator? The good news is any laser collimator axial beam when proven accurate by rotating it and used in accordance with these instructions, takes over for the secondary mirror when your black art no longer sets the vertical angle accurately enough – spot on the horizontal axis that before the star test with the Jet Stream somewhere else, only a laser collimator can show. Simple. Enjoy.
"This is a very well researched book."
– Phil Jennings, editor of the BAA Journal
"'The Cave Collimator was excellent for my Maksutov–Newtonian telescope and very good for my Rumak–Cassegrain."
– Professor Ian Morison, Jodrell Bank