2021年8月5日 · What can I see with a 4-inch refractor scope? That depends a lot on your local observing conditions (sky darkness, transparancy, seeing, local light pollution, etc.), as well as your observing experience.

2016年4月3日 · I just purchased a Carton CST-100KX (100mm f/13) telescope, and am looking to put it to good use. I have the following eyepieces; Zeiss Jena 10-O, University OR 12.5 mm, Star Trak 20mm wide view plossl, and an Edmund Scientific RKE 28 mm. Is there a good reference that recommends specific objects to view with a 4-inch refractor telescope.

2011年1月11日 · As a new owner of a 4" refractor (Celestron Omni XLT 102ED with both EQ and Alt-Az Mounts) and new to SGL I'd appreciate some advice on where I should be pointing my scope and what delights await (sadly viewing conditions have prevented me from seeing much so far! and I'm in a sub-urban environme...

A four-inch APO can be both highly portable and capable, attributes larger and smaller refractors struggle to combine. The following is a guide to some of the more commonly encountered and interesting examples, past and present. I have expanded the list to include refractors between 90mm and 110mm, rather than strictly 4”.

2021年5月8日 · Under dark skies, of course, a 4-inch refractor will reveal thousands of galaxies and show considerable detail in dozens. To illustrate that, read one of Sue French's small-scope tours from Celestial Sampler (many of the observations done from her dark suburban backyard!) or Steve O'Meara's Messier guidebook.

2010年5月23日 · Telescope: 4-inch (102mm) f/9.8 achromatic refractor. Conditions: Excellent seeing and transparency When Sirius B was at a relatively wide separation during the 70’s, I was using a spherical mirror, 4 1/4-inch f/10 reflector, not exactly the preferred telescope for accomplishing this feat.

In this article I will try to illustrate the views you can expect through different instruments, and perhaps help to decide which one to choose. The subjects covered here are: Moon, Planets, Sun, DSO, Comets, Stars, Light pollution.

2021年1月29日 · The 4" refractor will be lighter, faster to cool, and less sensitive to poor seeing than the 180 SM. So you can nip out and get on with observations within short windows of time. But they are somewhat compromised vs your Skymax when solely considering planetary observation, especially the F7 scope, as the 180 SM is built for planetary work.

2025年1月15日 · The Orion AstroView 102mm refractor telescope is a perfect beginner telescope offering the most value for money. You can easily enjoy star clusters, nebular clouds, and planets with the sharp 4-inch lens, and the kit comes with two essential eyepieces for …

2022年10月19日 · With a magnification power of approximately 200x, a 4-inch reflector telescope offers detailed views of astronomical phenomena. The ideal focal ratio for a 4-inch reflector telescope ranges from f/4 to f/5, ensuring a balance between light-gathering ability and depth of …