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How To Buy Your First Telescope

How To Buy Your First Telescope. Charlie Haffey 781-255-0229 chaffey@norwood.k12.ma.us www.norwood.k12.ma.us/sci. The Target User. Child Adult Beginner Novice. What You Expect. http://antwrp.gsfc.nasa.gov/apod/ap050428.html. What You Get.

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How To Buy Your First Telescope

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  1. How To Buy Your First Telescope Charlie Haffey 781-255-0229 chaffey@norwood.k12.ma.us www.norwood.k12.ma.us/sci

  2. The Target User • Child • Adult • Beginner • Novice

  3. What You Expect http://antwrp.gsfc.nasa.gov/apod/ap050428.html

  4. What You Get http://antwrp.gsfc.nasa.gov/apod/ap050428.html

  5. Types of Scopes • Reflector • Refractor

  6. Reflector http://www.omni-optical.com/telescope/images/ut104-2scopes.gif

  7. Refractor http://www.omni-optical.com/telescope/images/ut104-2scopes.gif

  8. Types of Mounts • Dobsonian • Equatorial

  9. Dobsonian • Up and down • Left and right www.astrostuff.com/ Swift_Telescopes.htm

  10. Equatorial mount Rotates parallel to Earth’s axis Easier tracking of objects

  11. Magnification http://www.celestron.com/tb-trms.htm

  12. Focal Length

  13. Calculate Magnification Focal length of telescope Focal length of eyepiece 1000 mm = 40 25 mm

  14. Magnification Limits • 40x most common • Increase magnification- • decrease field of view • decrease brightness • Over 100x • rarely used • very difficult tracking

  15. Image Brightness • Small increase in mirror diameter Large increase in surface area • 6 inch mirror = 28 in2 area • 8 inch mirror = 50 in2 area

  16. Six inch Dobsonian $259 & up Mr. Haffey Recommends

  17. The cheapest, easiest and best way to improve your first telescope...

  18. Zero magnification finder EZ Finder™ II Reflex Sight $34.95

  19. Upside is up finder Right Angle Correct-Image Finder Scopes $49.95 - $79.95

  20. Do Not Buy • 750 power! • From a deli • With unanswered questions

  21. Do Buy • Largest opening you can afford • Move & use with comfort • Reputable source

  22. Vendors • Orion Telescopes www.telescope.com • Meade Telescopes www.meade.com • Celestron Telescopes www.celestron.com • The Camera Company www.cameraco.com 866-769-0210

  23. After you buy your first telescope • Contact Mr. Haffey • First setup • First use • First light

  24. Good Luck, Have Fun!

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