Astronomical Telescope
Magnification of an astronomical telescope ?
Suppose you have a lens with a 120 cm focal length and you want
to make a telescope with a power of 60. What focal length lens should
you use with your other lens? Please explain how you got the answer? Thank you =)
First, let’s put things into more conventional units. 120cm = 1200mm.
Using 1200mm as your focal length, we can divided the value by the power (60X) to calculate the focal length of the eyepiece needed for that power.
1200mm/60 = 20mm eyepiece focal length.
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Science Astronomical 25/50 Power 40MM Telescope Tripod Mount Objective Lens $7.99 |
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VINTAGE EMPIRE ASTRONOMICAL TELESCOPE MODEL 641 APOLLO F=800MM D=60MM / NR!!! $69.99 |
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1960s Jason Explorer Astronomical Telescope 400 Model 307 With Box Near Mint $39.95 |
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Simmons 400 Power/60mm Astronomical Refractor Telescope model 6331 $155.00 |
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350 / 50mm Promo 120X Monocular Astronomical Telescope $69.99 |
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Newly Arrived: Professional F300 x 70 Terrestrial Astronomical Telescope $33.99 |
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700×60 Refractor Astronomical Telescope. 28x to 315x $110.63 |
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Galileo offering his telescope to three women,astronomical discoveries,1655 $8.99 |
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VINTAGE GILBERT 80 Power Astronomical Telescope / Original Case / Booklet $29.99 |
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Vintage Gilbert 13200 Astronomical Telescope Set, Original Box and Papers, 1950s $39.99 |
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350 / 50mm Promo 120X Monocular Astronomical Telescope $68.65 |
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Easton PA * Lafayette College Astronomical Observatory 1909 * Telescope $9.99 |
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350/60mm Astronomical Refractor Telescope with Two Eyepieces,Case & Tripod $76.00 |
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Vintage Kmart Focal Astronomical Telescope Great Condition! $45.00 |
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1960 Gilbert~Erector Set Rocket Launcher~Chemistry~Astronomical Telescopes AD $13.40 |
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Brand New F350x50 Monocular Astronomical Telescope High Quality Best Price $68.96 |
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Brand New F350x50 Monocular Astronomical Telescope High Quality Best Price $68.98 |
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Simmons Astronomical Telescope FL 625mm D-50mm 6310 $49.99 |
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Newly Arrived: Professional F300 x 70 Terrestrial Astronomical Telescope $33.39 |
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Astronomical 20X50 Power Monocular Telescopes/Tripod $24.99 |
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Professional F300 x 70 Terrestrial Astronomical Telescope $33.53 |
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30x60mm Binocular Astronomical Telescope HIgh Quality $22.30 |
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20 x 50 Binocular Monocular Astronomical Telescope $40.99 |
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Brand New High Quality F 360 x 50 Astronomical Telescope Monocular $29.99 |
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Beginner’s Guide to Astronomical Telescope Making by James Muirden $13.50 |
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Vixen Astronomical Telescopes Collection 2012 Japan Version $6.50 |
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BIG Astronomical Telescope Adhesive Removable Wall Decor GRAPHIC Stickers Decal $26.95 |
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BIG Astronomical Telescope Adhesive Removable Wall Decor GRAPHIC Stickers Decal $26.95 |
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Tele-Science Astronomy Astronomical Telescope FOR PARTS (missing eye piece!) $15.83 |
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RARE! Astronomical Observatory & Meteorological Center Havana, Cuba – Telescope $79.95 |
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Astronomical Reflector Telescope:35-787x+FREE Accessory $59.00 |
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terrestrial astronomical telescope $0.99 |
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Adaptive Optics for Astronomical Telescopes NEW $263.28 |
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VINTAGE GILBERT ASTRONOMICAL TELESCOPE 80 POWER NO. 13211 ORIGINAL CASE $5.99 |
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NEW How to Use an Astronomical Telescope – Muirden, Jam $18.14 |
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VINTAGE RARE GILBERT ERECTOR SET 80 POWER ASTRONOMICAL TELESCOPE GILBERT TOYS $14.99 |
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HOW TO USE AN ASTRONOMICAL TELESCOPE : Beginner’s Guide to Observing the Cosmos $7.99 |
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Astronomical Telescope with Tripod: Model EDU-41005 $26.63 |
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NEW The Science and Art of Using Astronomical Telescope $22.55 |
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Celestron LCM 80 Automatic Computerised Refractor Astronomical Telescope $474.19 |
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Edmund Scientific Astronomical Barrington NJ Telescope Optical 1976 Space AD $12.95 |
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Germany 1981 – Meter – ASTRONOMICAL TELESCOPE – ZEISS $5.90 |
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Barska Astronomical D=70mm F=400mm Telescope & Accessory Bundle- Lens Manual ETC $14.10 |
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Entry Level 4.5” Reflecting Astronomical Telescope Complete Outfit $237.09 |
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Celestron PowerSeeker 50AZ Table Top Astronomical Telescope $72.70 |
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Aerolite Astronomical Telescope D=60MM F=910MM Model 859 w/Extras $169.99 |
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Astronomical 20X50 Power Monocular Telescopes/Tripod $27.99 |
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Astronomical Refractor Telescope Kit for Kids-Beginners $68.18 |
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How to Use an Astronomical Telescope: A Beginner’s Guid $26.18 |
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OSTARA 7 PIECE VISUAL FILTER SET FOR ASTRONOMICAL TELESCOPE 1.25″ $55.31 |
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ASTRONOMICAL TELESCOPE Wall Graphic Sticker Art Decal $26.99 |
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ASTRONOMICAL TELESCOPE Wall Graphic Sticker Art Decal $26.99 |
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Lens Grinding Mirrors Astronomical Telescopes Silvering $4.00 |
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Astronomy: Astronomical Telescopes Pt. 2 (Illustrated Booklet), The Science Muse $5.99 |
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Carl Zeiss Jena vintage 16mm eyepiece for astronomical telescope $165.00 |
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Hawk Astronomical Telescope $60.12 |
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Astronomical Photography at the Telescope 1959 LOOK $19.99 |
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1817 DATED PRINT ASTRONOMICAL INSTRUMENTS ~ TELESCOPE & MICROSCOPE REFRACTING $45.05 |
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1817 DATED PRINT ASTRONOMICAL INSTRUMENTS ~ PRINCIPLES ACHROMATIC TELESCOPES $45.05 |
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Vintage TOWER ASTRONOMICAL TELESCOPE MODEL NO. 6314 $80.00 |
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Astronomical Telescope 25/50 Power 40 mm $39.99 |
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1960 Gilbert~Erector Set Rocket Launcher~Microscope~Astronomical Telescopes AD $13.45 |
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TeleScience Astronomical Telescope with Tripod $46.85 |
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Zoom Astronomical Telescope 350/60mm 120x Monocular $89.99 |
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1961 AD Astronomical Telescope Swift Selsi Monolux Research Binocular Microscope $12.99 |
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CELESTRON ASTROMASTER 114EQ ASTRONOMICAL & LAND TELESCOPE $197.59 |
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Star Testing Astronomical Telescopes Harold Richard Suiter SIGNED Inscribed $39.99 |
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The astronomical telescope (The Wykeham science series $28.00 |
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ASTRONOMICAL TELESCOPE Wall Decor Sticker Decal Chidren $19.79 |
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ASTRONOMICAL TELESCOPE Wall Decor Sticker Decal Chidren $19.79 |
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NEW Monocular Astronomical Telescope 350/50mm K9mm:40x K25mm:14x $59.00 |
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Hawk Astronomical 60 DIA F=600MM Telescope w/ Tripod $39.99 |
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Astronomical Telescope Gundlach Optical 1893 Antique AD Scientific Instrument $18.95 |
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Tasco 302851 Telescope – Astronomical – See the Moon~! $79.95 |
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Astronomical 20X50 Power Monocular Telescopes/Tripod $27.99 |
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6E42 Vintage 1967 Jason Empire Constellation Astronomical Telescope EXCELLENT!! $257.00 |
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Lens Grinding and Mirrors for Astronomical Telescopes b $5.50 |
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New 30x60mm Binocular Astronomical Telescope $22.99 |
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Professional 350/60mm Monocular Astronomical Telescope White And Black $80.00 |
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ASTRONOMICAL Instruments Sector Telescope – Antique Print by A. Rees $11.90 |
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Celestron PowerSeeker 50mm Astronomical Telescope 21039 $39.99 |
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27″Western Bronze ART astronomer woman hold astronomical telescope $480.00 |
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Vintage TOWA JAPAN ASTRONOMICAL TELESCOPE D=60mm, F=700mm WOODEN STAND $130.50 |
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**CELESTRON**127mm(5 inches) X 1000mm ASTRONOMICAL TELESCOPE w/ STURDY TRIPOD. $195.00 |
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Visionking CF 90500 (500/90mm) Space Astronomical Telescope Spotting scopes Gift $149.99 |
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400 Years of Astronomical Telescopes: A Review of Histo $186.51 |
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SKY & TELESCOPE MAY 67 LINDHEIMER ASTRONOMICAL CENTER $14.95 |
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Scarce Large Telescope Astronomical Instrument 1820 Hand Colored Engraving $39.00 |
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ORBITOR 167X 76MM ASTRONOMICAL REFLECTOR TELESCOPE NEW IN FACTORY BOX $129.95 |
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The Principles of Astronomical Telescope Design NEW $262.70 |
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Astronomical ~Telescope~ 525 Power 50 mm Space Science Night Sky Viewing +TRIPOD $48.88 |
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Astronomical ~Telescope~ 25/50 Power 40 mm Kids Beginner Space Science Research $39.88 |
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350/60mm Astronomical Refractor Telescope with Two Eyepieces,Case & Tripod $81.99 |
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20 x 50 Binocular Monocular Astronomical Telescope $40.99 |
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Celestron PowerSeeker 60 Astronomical Refractor Telescope $110.63 |
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350/50mm Promo 120X / Monocular Astronomical Telescope $62.99 |
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Telescope,Naval Observatory,Astronomical observatories,Washington DC,c1904 $8.99 |
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Telescope,United States Naval Observatory,Astronomical,Washington DC,c1904 $8.99 |
