Choosing and Using a Schmidt–Cassegrain Telescope

R. Mollise

Springer, 2001 – ISBN 1-85233-631-5 – pp.vii + 357 – £24 (paperback)

Reviewed by T. Boles : Journal of the British Astronomical Association, 111(6), 351 (2001)

This book is part of Springer’s ‘Practical Astronomy’ series, edited by Patrick Moore. Its contents accurately reflect the title. It is a comprehensive introduction not only to the Schmidt–Cassegrain telescope, but also its care and use.

The book starts by comparing the advantages and disadvantages of SCTs against other types of telescope. It addresses the commonly discussed effects of the central obstruction on contrast, the effects of collimation, and takes a very pragmatic view of whether these ‘scopes are really portable. The instruments are discussed in three main categories: lower-cost ‘budget’ ‘scopes; medium-priced versions with added features; and finally the top-of-the-range luxury SCTs, which is how the author classifies instruments such as the Meade LX200 and the Celestron Ultima 2000.

As an SCT owner myself I know it can be very difficult to take an objective view of each instrument. I believe that Mollise has been successful in being objective in his approach. Where personal opinions are put forward they are clearly identified as such. I also cannot take issue with any of them, as I agreed with most, and would not disagree strongly with any.

Mollise has researched the products well. With most he gives examples of hands-on experience in setting up and using them. Running parallel with the technical advice, and interlaced into the text, is the story of the evolution of the SCT, some information on manufacturing methods involved, and its history from the coveted Questar of the 1950s to the latest products from Meade and Celestron.

The choice of model for visual, photographic and CCD use is discussed. The fork and German equatorial mounts are compared. The book contains one of the best descriptions on how to collimate an SCT that I have read. It goes on to describe how to select the best telescope, either new or second-user, and how to ensure that you get value for money. The comments on hardware pricing are very American. It describes the great $ prices that these ‘scopes can be purchased for, but thankfully acknowledges that Europe does not enjoy this advantage.

The book goes on to describe the multitude of accessories available for these instruments, and describes how various astronomical objects would appear.

This book will be useful to all owners of SCTs. Sadly, not everyone will read it before buying their first SCT.