Free Ebook Choosing and Using a Refracting Telescope (The Patrick Moore Practical Astronomy Series)
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Choosing and Using a Refracting Telescope (The Patrick Moore Practical Astronomy Series)
Free Ebook Choosing and Using a Refracting Telescope (The Patrick Moore Practical Astronomy Series)
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Review
From the reviews:“Dr. Neil English is no stranger to the astronomical community … . His knowledge of telescope optics is highly respected, and here he endeavours to lay down all his knowledge in a concise and thorough manner. He opens the book with a wonderful overview of the history of the telescope … . this book something you really want to own, as it’s a guide not only to what is achievable by anyone with modest equipment, but also what to aspire to. Thoroughly recommended.†(Nick Howes, Astronomy Now Online, May, 2011)“Neil English opens with a brief history of refractor design, including the contributions of Lippershey, Galileo and Huygens, amongst others. … the text is clearly written and there’s plenty of useful data in the appendix. … it’s a valuable resource for anyone thinking about buying a refractor or who wants to learn more about the history and development of this iconic scientific instrument.†(Mark Parrish, BBC Sky at Night Magazine, June, 2011)“Having owned around a dozen refractors over the years–ranging from a ‘lowly’ 40mm refractor, through several antique examples to a go-to refractor–I was keen to read a book that promised to reinforce my love for ‘the prince of telescopes’. … An excellent, up-to-date book containing much more than I have outlined in this review. English communicates his passion for refractors, and the book comes to life with user accounts of refractors old and new.†(Peter Grego, Popular Astronomy, July-August, 2011)“Value to have accessible a comprehensive guide to the availability and use of refractors, which have a special attraction and romance –– especially for those who have used and appreciated the best of them. … The short but useful appendices include glossaries of terms and formulae, and data on a selection of double stars which can be used for testing refractors of various apertures. … Even for those with only the slightest interest, it would certainly inspire them.†(R. A. Marriott, The Observatory, Vol. 131 (1224), October, 2011)
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From the Back Cover
The refracting telescope has a long and illustrious past. Here’s what the author says about early telescopes and today’s refractors: “Four centuries ago, a hitherto obscure Italian scientist turned a home-made spyglass towards the heavens. The lenses he used were awful by modern standards, inaccurately figured and filled with the scars of their perilous journey from the furnace to the finishing workshop. Yet, despite these imperfections, they allowed him to see what no one had ever seen before – a universe far more complex and dynamic than anyone had dared imagine. But they also proved endlessly useful in the humdrum of human affairs. For the first time ever, you could spy on your neighbor from a distance, or monitor the approach of a war-mongering army, thus deciding the fate of nations. “The refractor is without doubt the prince of telescopes. Compared with all other telescopic designs, the unobstructed view of the refractor enables it to capture the sharpest, highest contrast images and the widest usable field. No other telescope design can beat it on equal terms. From a practical point of view, refractors are the most comfortable and least troublesome telescope to observe with. They require little maintenance and cool down rapidly to allow you to observe in minutes rather than hours. Because a refractor has more back focus than almost any other form of telescope, it can accept the widest range of accessories, including filters, cameras, and binoviewers.†Explore in this book what makes refractors such a good choice for amateur astronomers and how to choose the right one for you. Also get some great tips on how to use your new refractor. Get started now, seeing for yourself the dazzling and complex universe first opened to human sight more just 400 years ago.
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Product details
Series: The Patrick Moore Practical Astronomy Series
Paperback: 296 pages
Publisher: Springer; 2011 edition (September 29, 2010)
Language: English
ISBN-10: 1441964029
ISBN-13: 978-1441964021
Product Dimensions:
6.1 x 0.7 x 9.2 inches
Shipping Weight: 1.2 pounds (View shipping rates and policies)
Average Customer Review:
4.4 out of 5 stars
9 customer reviews
Amazon Best Sellers Rank:
#1,955,176 in Books (See Top 100 in Books)
If you are looking for a book to provide the ins and outs concerning refractors, stop here. And if you like to read a well written book would like to acquire knowledge concerning refracters, you have the right book.Unlike a lot of offerings in this area, this book is well organized, well illustrated, and well written. We are provided with a good, abridged history lesson on the subject of the refractor. Then the writer gets a bit technical without losing the reader. He explains how the refractor works, the inherant problems concerning that type of scope, and how those problems were addressed by various craftmen. He then provides reviews of various scopes.Nothing is perfect, so I suppose there had to be problems. And it was at this point some strange issues appeared. I am somewhat confused by the scopesvthe writer choose to review. Now, this maybe due to the approach and style of writing the author choose to use, an informal approach to the subject. None the less he neglects some scopes that I feel should have been included in his reviews. An example is the 90mm long tube achromate. The 90mm is a very popular choice for a beginners instrument and also for observing planets. Yet this scope is not mentioned. On the other hand, he spends an inordinate amount of time on some scopes that are so rare it is doubtful they should rate that much written space. This approach was confusing to me and forced me to backtrack through the book to see what I must have missed. Unfortunately, I have not missed a thing.It’s hard to see the writers purpose given the inconsistancies in his choice concerning the scopes he choose to review and the space allotted to each scope. It would have been helpful if he had provided some type of chart or list with some stats. Even more to be point, shorter more concise reviews of a wider scope selection would have been more pleasing to the reader.Even with those misgivings I still rate this as a very good book. You seldom find an offering in this area that provides this level of info.Do, Anyone wanting to know more about refractors or would like a nice short reference work, would do good to get this book.
Neil English has a passion for refractors and he isn't afraid to sing its praises!Nowadays, it would seem that refractors have taken a back seat to more popular, compact designs like the Schmidt-Cass, Maksutov, or amateur astronomy's workhorse, the Newtonian. But Mr. English pleads the case for the iconic refractor and the quality of its still superior images. He covers every design type with in-depth chapters ranging from; the history of the refractor, the traditional classical f/15 refractor, instruments of faster ratios, special dispersion glass, apochromatics, and the future of the refracting telescope. English also devotes chapters to the refractor's peculiarity of design and presents a strong case as to why the venerable, classical f/15 refractor still reigns supreme. The closing chapter covers the classical refractor's more recent popularity and quiet comeback.Neil English loves refractors and his enthusiasm sometimes leaps off the page. But, his work is methodical and he backs his observations and examples with hard evidence, calling on optical experts and professional astronomers to rally for his cause.If you are a hardcore refractor man, Neil English is preaching to the choir. If you are considering purchasing a refractor, this book is a revelation. If you like telescopes, this book is simply a joy to read.I have been a dedicated refractor owner, and user, for more than 34 years. Looking through a long focus, "classical" refractor for the first time is an experience that is truly sublime. And, it stays with some amateur astronomers for a lifetime.
Books in this series are about 10%-20% too expensive, but the size of this publisher's market is small, and given the quality of the information, the images and the author's style, I would definitely purchase this book again. I was planning to read it through systematically, but my curiosity for what came next drove me rapidly forward, and now I must go back and move ahead with pen in hand, underlining what's important for me. The author details carefully the differences between models and types of optical tubes that virtual beginners like me might too easily gloss over or overlook entirely. Refractors are but one of the three basic types of telescope; newcomers should learn about all three types before making a serious purchasing decision. This text belongs in every amateur astronomer's library.
If you are a refractor affectionado you will love this book. I have used telescopes for over 45 years and I thought I knew everything about refractors and I was wrong (e.g. defocus tolerance and the affects on seeing). The book has a breezy writing style that is upbeat and fun to read. Mr. Neil English is passionate about refractors and it is infectious! My only complaint is that the book places too much emphasis on reviewing telescopes (which will become outdate over time) and I would like to seen more emphasis on testing and optical performance theory. To the author's credit he did an excellent job explaining complex optical theory in a very digestable manner. A few typos were noted and some of the graphs were hard to decipher (due to lack of a color legend). Most of the books emphasis is on visual observing and not digital imaging. Some readeres may not agree with the author that the old telescopes were in many cases better than the new genera of APOs. I do agree with the author's statement that a properly made achromat with a slow f/ratio is really hard to beat for depth of focus, sharpness and contrast. I have seen it with my own eyes! When the book came to an end I found myself wanting more.
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