aktiválás Hazugság hamisítvány calculate telescope f number hőfok Tágas Hobart
Cassegrain Formulas and Tips by Mike Lockwood
Telescope Basics 2 (of 6): Learn to calculate magnification for a telescope/understand focal ratios - YouTube
f-number - Wikipedia
Telescope Equations: Magnification
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
Two-mirror telescopes: Cassegrain, Gregorian and variants
Telescope F ratio: Astrophotography Talk Forum Forum: Digital Photography Review
The focal lengths of objective and eye lens of an astronomical telescope are respectively 2 meter and 5 cm. Final image is formed at (i) least distance of distinct vision (ii) infinity.Magnifying
Telescope Calculator: How Does Your Telescope Perform? | Sky & Telescope - Sky & Telescope
A beginner's guide to magnification with telescopes - Astrofarm
Bintel Astronomy Setup Calculator - Bintel
Light Vortex Astronomy - Article: How to Very Accurately Calculate your Telescope's Effective Focal Length
How to Calculate Telescope Magnification
Refractive Telescopes
Is there any equation to calculate the optimal focal length in a Newtonian telescope? - Quora
vik dhillon: phy217 - basic principles
Aperture, focal length and focal ratio - Optics Trade Blog
Thiery Legault - How to adjust the focal length ?
what telescope should i look for?
Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope