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this is one of those books that no only expresses but achieves the aspiration to be a classic. for the reader who is relatively new to amateur astronomy generally, or new to the catadioptric (CAT) telescopes specifically, this book is as essential and useful as "norton's star atlas", "sky atlas 2000" and several deep sky observing guides besides.



although every chapter title is a play on the acronym cat ("Care and feeding of a CAT", "Inside a CAT," "Hacking a CAT", etc.) in a way that suggests a limited topic coverage, i found some amusement in trying to find a topic that *is not* discussed in this 335 page guide. collimation? a 5 page discussion. mandatory items, like flashlights or dew heaters? check. the use of a hartman mask for precise focusing? pages 294-95. how to deal with telescope dealers? yep. how to use a dark hood, and the importance of warm feet? it's in there. a review of telescope brands and models, astronomy software and a long list of astronomical dealer and web sites? oh yeah. i did finally stump him: there's no formula to compute an eyepiece true field of view using the star drift method (mollise gives the optical formula instead).



elsewhere i gave a negative review of another CAT volume in the patrick moore series because it nohow lived up to its title. with mollise the circumstances are just the reverse: until you pick up this apparently humble book, you'll have no idea how much useful stuff is in here.



essential reading before you buy a CAT telescope, and very helpful reading for every night that you use a telescope, no matter what kind it is.

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