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#Best telescope eyepieces full#

If you develop in interest in hunting for the faintest of deep sky objects, and you have access to dark skies, you might add a 2" star diagonal and a long focal length eyepiece (such as a 2" 56mm Plössl) for maximum image brightness and an extra-wide field. If you develop an interest in very high power lunar and planetary observing, you might later add a very short focal length eyepiece for those rare nights when seeing conditions allow the highest powers. In other words, if you start with a 25mm medium power eyepiece, you might first add a 9mm to 13mm eyepiece for high power observing and then a 40mm or 42mm for low power. If your skies are fairly dark, your second choice might be a low power eyepiece with about half the power of your scope's standard eyepiece. This will give you larger planetary images and will more easily resolve globular clusters and binary stars. Keeping in mind the power per inch of aperture and exit pupil guidelines above, your first optional eyepiece might be one with about twice the power of the eyepiece supplied with your scope. Its power is low enough to show you a generous field for deep space observing (but not so low that light pollution masks faint nebulas and galaxies), while still high enough for reasonably-sized planet and star cluster images. Most telescope manufacturers supply one medium power eyepiece with their scopes.

#Best telescope eyepieces full#

It makes more sense to have just three or four well-chosen eyepieces that cover the full range of observing possibilities. You'll spend more time trying to pick the right eyepiece to use than you'll actually spend observing.

Astro-Tech AT60ED and AT72EDII Black Friday SaleĬhoosing eyepieces: It makes little sense to buy lots and lots of eyepieces.

Various Closeouts Meade, Kendrick, Bob's Knobs, JMI and others.

Astronomics Used, Demo, Closeout, Spring Cleaning Page.

Rechargeable Batteries And Power Supplies.

Personal Planetariums / Electronic Sky Guides.

Focal Reducer and Field Flattener Combos.

Equatorial & Altazimuth Accessories & Adapters.

Since there are no eyepieces of that size, the minimum we are using is 4mm. We have used the most common sizes in the market, but if you have a telescope that doesn’t match exactly any of the rows below, simply look for the one that is closest, the resulting values should be close enough if your focal length varies by 100 or 200 or if the aperture varies by 0.3 inches or so.įor some of the smaller telescopes, the eyepiece size to reach max useful magnification would be 2mm-3mm. Once you have those values, simply look up the corresponding aperture and focal length in the table below. If you don’t know your telescope’s aperture and focal length, simply look up the model online, it should be pretty easy.

What is the eyepiece size you would need to reach that magnificationįor that second value, you will also need to know your telescope’s focal length.

What is your telescope’s Highest Useful Magnification according to its aperture.The following chart will help you figure out two things You simply need to apply a formula using your telescope’s aperture as the base variable, however, why do the work when we have already done it for you. This is the one number that is going to determine what accessories like eyepieces or Barlow lenses are a good fit for your device, as well as how much magnification can you shoot for before getting a blurry image.Ĭalculating your maximum useful magnification is relatively simple. One of the most useful specifications you need to understand about your telescope is its highest or maximum useful magnification.