http://themcdonalds.net/astrophotography-equipment-telescopes/ WitrynaThe ASA800 RC f/6.85 Optical Tube Assembly is based on a Ritchey Chretien design that is superior for applications like long exposure astrophotography.

Astrograph Telescopes - Ritchey Chretien, Newtonian, & More Telescopes

Witryna2 gru 2016 · In order to have both telescopes at the same focal ratio the 200 mm aperture telescope would have to have a focal length of 2,000 mm. ... It is important to understand that in this particular case, the reason that the results are so close is because the cameras are the same. Therefore, all that counts is the irradiance in the focal … Witryna21 wrz 2014 · As the focal ratio number reduces, so the speed goes up. So my f6 telescope is slower than the telescope with f/4.8 ratio. Faster f/ratio telescopes are generally better for low power user's, wide field observing and deep space photography. whilst the slower focal ratios are better suited to higher magnification, ie. shuforcongress

ASA - ASA800 Ritchey Chretien f/6.85 Optical Tube Assembly Telescopes

Witryna11 mar 2024 · An ideal focal ratio for this type of object is f/10 or more. If you are interested in capturing wide views of galaxies, star clusters, and the Milky Way, then a low focal ratio is preferred. A telescope with a low focal ratio provides more of the sky but less magnification. Widefield telescopes have a narrower focal ratio of less than f/7. WitrynaThe most important of all the powers of an optical telescope is its light-gathering power. This capacity is strictly a function of the diameter of the clear objective—that is, the … WitrynaTherefore, in order to produce a clearer and more focused image, the circumference of these mirrors must either be quite small or the focal ratio (this is the focal length of a … theotokos definition bible