Telescope Eyepieces Guide - High Point Scientific
WEBAug 11, 2021 · This can be achieved by dividing the telescope’s focal length by the desired magnification to solve for the eyepiece focal length you would need to achieve that magnification. For example: If you have an 8" f/10 SCT, it has a focal length of 2032mm. Let’s say you’d like an eyepiece that gives you 250X. 2032 divided by 250 is about 8, so ...
Which Telescope Eyepiece Is Right for You? - Sky & Telescope
WEBJul 17, 2006 · The largest-focal-length eyepiece you can use with your telescope is easy to calculate: multiply the focal ratio (the focal length of your scope divided by its aperture) by 7. For example, your Newtonian scope is f/5: the largest-focal-length eyepiece you should use is 35 mm. (Note: there is no harm in using a lower-power eyepiece — you will ...
Telescope Lenses: What You Need to Know and More - Optic …
WEB2 in – the 2-inch eyepiece barrel diameter has a focal limit of 55mm, and gives more freedom in viewing, but can be more expensive, and heavier, even tipping the telescope. These work with 48mm filters. 2.7 in – these eyepiece barrel diameters are more expensive and are made by fewer manufacturers.
Telescope Optics for Hobbyists
WEBThe objective lens is the first lens in the telescope and tends to have both a large diameter and a large focal length. Large objectives are used for their light-gathering ability and the large focal length allows for larger magnifications. For these elements, it is key to work with precision lenses which produce little to no aberrations ...
Telescope eyepieces, how to choose and best ones to buy
WEBHow do eyepieces work, what are the different types and which are the best eyepieces for your telescope? Find out in our beginners' guide.
Telescope Eyepiece Guide (Lens): Sizes, Types, Function
WEBSep 20, 2023 · The most common telescope eyepiece sizes are 1.25 inches (31.75 mm) and 2 inches (50.8 mm). These measurements refer to the diameter of the eyepiece’s barrel, which is the portion that inserts into the telescope’s focuser. Is a 0.965-inch (24.5 mm) telescope eyepiece considered common?
How to Choose Eyepieces for Your Astronomy Telescope
WEBNov 19, 2018 · Let's get a slightly smaller exit pupil of 1.8mm, which means an 18mm eyepiece that gives 111x. Such an eyepiece with a 60° AFOV will show 0.54°, about the size of the full Moon. With a 7mm, 18mm, and 24mm eyepiece, you get magnifications of 83x, 111x, and 285x, a good range of magnifications for this instrument.
Best eyepieces for telescopes 2024: A crucial telescope accessory …
WEBApr 10, 2024 · Together, it means you've got some of the best eyepieces for telescopes on the market, and lenses that offer incredibly clear and sharp images. The Tele Vue Plossl eyepieces offer outstanding ...
Best Telescope Eyepieces 2024: Buyers’ Guide - Astronomy Source
WEBFeb 1, 2024 · These are good telescope eyepieces and have good eye relief, although their fields of view are limited. Many telescopes above the budget price category include Plössl eyepieces (sometimes abbreviated P or PL, but usually not abbreviated.) These have four lens elements and can provide a comfortable 50 degree or so field of view.
How to Determine Which Eyepieces to Use with Your Telescope
WEBJul 30, 2020 · The scope’s highest useful magnification is 307x and the lowest is roughly 19x. To determine the focal lengths of eyepieces that fall within the magnification limits, you must take the focal length and divide by the magnification. For the AstroMaster 130EQ, the highest useful magnification is achieved with a 2.1mm focal length eyepiece.