The reason I recommend only the refractor and the Newtonian telescope types is that these are the two best suited to the beginner. What you really want to avoid is spherical mirrors and Catadioptric Newtonians - see later. Parabolic mirrors are sometimes, ratherĬonfusingly, called 'Aspherical' mirrors. Parabolic 130mm (Search "130P" and see the Newtonian Reflector section below). The smallest Newtonian I recommend for a proper start into astronomy is a Mirror (see 'Parabolisation' section later) and would not produce images as good as an 80mm achromatic refractor. You will need something slightly larger to see what you will read about and want to see.Īlthough, technically, the 120mm Newtonian should be at least equivalent to an 80mm refractor (See 'Resolution' section later) this model has a spherically figured These two (left) are impressive looking instruments, with their equatorial mountings and slow motion controls, but they are too small to be of any I will generally refer to them as Newtonian and Refractor, to save confusion between reflector and refractor. The two types of telescope I am going to recommend are: 'Newtonian Reflector' and 'Astronomical Refractor'. In this guide: 20+ Photographs / 30+ Illustrations / 2 To the best of my ability with many pictorial examples why this is the case. I recommend the beginner starts by using one of TWO types of telescope and I'll give you a guide onĬonsideration: Especially for the beginner. Qualifications in astronomy, having been a director of an astronomical company, and with over forty years experience in observational astronomy, I hope you will trust my informed guidance in this Guide you to the 'trainers section' (A good durable shoe that is suitable for many, many different activities!)Īllow me to guide you towards your first 'scope with an explanation of the considerations you need to make while choosing. You wouldn't wear high heel stilettos to a tennis match - Or use an f15 refractor for Deep Sky Objects. Others, the ones I will guide you to, are suitable for many applications. There are many different telescope types and the reason for this is different subjects require different optical perameters.Ĭhoosing the right one for you is a bit like choosing shoes! There are many different types of shoe, and some are suitable only for certain activities. Telescope that you will be able to keep using for many years without great expense.Īny telescope is better than no telescope at all, but very small telescopes have very limitedĪpplications in astronomy and will soon have you wanting to see more. My advice will save you throwing away money and will get you a If you buy yourself the wrong one, you may end up giving up on astronomy because your expectations have been let down. MUST BE 18 years or older to purchase.S ooner or later, if you're interested in astronomy, you'll decide you want a CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA! By purchasing this item, buyer agrees to accept all responsibilities and AGREES TO hold seller harmless from injury or damages resulting in the use and possible mis-use of this item. Protective clothing (fireproof) is also recommended as well as a large open space away from structures and autos. If you are crazy enough to use this for sun collection I strongly recommend wearing protective eye goggles (wielding/blow torch) to prevent eye damage. NO AFFECT ON SOLAR OR OPTICAL PERFORMANCEĪLL IMAGES AND VIDEOS © GREENPOWERSCIENCE.COM THIS MIRROR HAS MINOR MOUNTING IMPRESSIONS FROM THE CLIMB-1551 F IR THERMOMETERĮXTRA DURABLE ACRYLIC SPRAY IS ADDED TO THE BACK * FOCAL LENGTH-20.3 INCHES FROM OUTER RIM - 23.3 INCHES FROM CENTER BASE * BEAM SIZE MAX POWER-1 INCH (additional scatter"6)adds background heat DOING SO MAY RESULT IN COPYRIGHT INFRINGEMENT. SCIENTIFIC DATA AND PHOTOS ©2008 PROPERTY OF GREENPOWERSCIENCE AND MAY NOT BE COPIED OR USED FOR OTHER EBAY LISTINGS. IT WILL LAST YEARS WITH RESPONSIBLE CARE, LONG SUN LIFE! THIS MIRROR IS DURABLE BUT WILL SCRATCH WITH MISUSE. PARABOLIC COLLECTOR VERY POWERFUL!!!!!!!!!Ī GLASS MIRROR THIS SIZE SELLS FOR $9500 AND IS VERY FRAGILE! THIS MIRROR HAS A FEW VERY MINOR IMPERFECTIONS FROM THE PROCESSĪLMOST PERFECT BUT VERY MINOR, AS GOOD AS I HAVE EVER SEEN IN ACRYLIC! ACRYLIC PARABOLIC MIRROR 35 INCH DIAMETER!ĪLMOST 3 FEET IN DIAMETER.
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