The 7 Best 40 mm 2 inch Eyepieces (2023 reviews)

We consider a 40 mm 2 inch eyepiece to be a worthy investment in the long run. We are here to help you choose the right one for your purposes from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: Celestron 40 mm 2 inch Eyepiece READ REVIEW

Best For target hunting: Buy: Orion 40 mm 2 inch Eyepiece READ REVIEW

Best For Moon: Buy: Svbony Degree Apparent Field READ REVIEW

Best For planet: Buy: Meoptex 40 mm 2 inch Eyepiece READ REVIEW

Best For glass: Buy: Svbony 40 mm 2 inch Eyepiece READ REVIEW

Best For refractor: Buy: Pentax 40 mm 2 inch Eyepiece READ REVIEW

Best plossel Eyepiece: Buy: Astromania 40 mm 2 inch Eyepiece READ REVIEW

Best Overall: Celestron 40 mm 2 inch Eyepiece

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The Celestron 93325 40 mm omni eyepiece ought to fit a starsense 8 " dobsonian without any difficulty, provided you use a 1.25 " eyepiece adapter ring. This eyepiece works well in the slower scope, where it gives bright, sharp images. It is great for viewing close ups of jupiter and saturn.

Using a 40mm eyepiece in this scope will give you a very low magnification of 18x, which is well suited for open clusters, lunar observation and sweeping wide regions of target-rich constellations such as Scorpius and Sagittarius. It comes in its own sturdy container for storage. This is a good quality eyepiece. The eyepiece gets the heaviest use with star clusters, mainly hunting globular clusters.

• You can have a big aperture and focus precisely, even with the barlow
• More then enough to enjoy astronomy, great eyepiece, inexpensive
• High power for splitting close doubles, planetary viewing, and zeroing in on faint fuzzies

Best For target hunting: Orion 40 mm 2 inch Eyepiece

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Orion has been making great eyepiece for years, thanks to a combination of clever design and appropriate materials. If you are looking for a lower magnification with wide apparent field of view, this is a great eyepiece. It will give a nice view of deep sky objects within the resolving power of the scope. The 5 lens wide angle 70* degree design gives excellent visual quality both color correction and flat field. The long eye relief makes this eyepiece useful for finding faint objects then getting them centered for another X eyepiece.

This is enough to see the moon's craters clearly, and with a view that is definitely a big step up from 1.25" eyepieces. The eye relief is excellent and comfortable to view for long periods of time.

• Wide field of view is very pleasing
• Well made, good (not great) view and it feels good in your hand
• Just an all-around enjoyable eyepiece to use
• Great eyepiece, good contrast and durable materials

Best For Moon: Svbony Degree Apparent Field

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The svbony degree apparent field should be able to handle its purpose and duties with ease. The V 154 eyepiece has a large field of view and the field of view is as high as 70 degrees which will give you that unforgettable lost in space feeling. It is a 5-elements / 3group structure and made of high index glass. It includes dust caps plus it is used for long-term observation.

The eyepiece housing is designed with a non-slip rubber grip ring, so that it will not fall easily when you hold it in your hand. It is threaded to accept standard 2" filters. It is suitable for anyone wearing glasses and not wearing glasses.

• High resolution and excellent flat field characteristics
• Super wide angle 68 degree, 4-elements 3-groups lens structure, 17mm eye relief
• Sharp optimal performance with low chromatic aberration

Best For planet: Meoptex 40 mm 2 inch Eyepiece

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This eyepiece is definitely the way to go if you don't want to spend more on the cost of your scope on a single eyepiece. It features an optical advancement over the traditional kellner and gives sharp, faithful lunar, planetary, and deep-space images. The 40mm here is a little sharper with less coma out near the edge, with considerably more useful image in the eyepiece. It is threaded to accept standard 2"" filters, includes a rubber eyecup for comfortable viewing and is fully multicoated.

The kellner eyepiece design uses a minimum of glass. It includes dust caps additionally it is essential, kellner eyepieces are highly recommended. These are not as immersive with a field of perhaps 70 degrees but look just as good because the long eyecup keeps your eye at the perfect distance for full picture. It will fit any telescope with a 2" focuser.

• Reall crisp and saturated and no kidney beaning
• Nice 2" eyepiece for the telescope
• Kellner wide field eyepices with comfortable viewing position
• Much easier on your eye during extended use

Best For glass: Svbony 40 mm 2 inch Eyepiece

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The svbony 40 mm 2 inch eyepiece is suitable and reliable and fits well with your daily usage. The 72 Degree wide field eyepieces are optimized to produce high contrast. It comes with a removable and foldable soft silicone rubber eyecup for the comfort of the observer. There is *very* minor chroma near the edge of the field (outer 15%) but the center view is stunning.

The length of the rubber eyecup is 10mm, and the eye relief is 24mm. It is equipped with a detachable and collapsible soft silicone eye cup for long-term observation. It's a great Halloween birthday christmas gift.

• Combinations of low dispersion and high refractive index optical glasses
• Additional chromatic aberration introduced, making it easier to make long-term observations
• Fully multi-coated glasses for excellent image contrast and light transmission
• Nice wide field low power view

Best For refractor: Pentax 40 mm 2 inch Eyepiece

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The pentax 40 mm 2 inch eyepiece should be able to handle its purpose and duties with ease. The R is the perfect eyepiece for viewing the nebula, planets and exploring the night sky. It features an extra-wide 70 additionally to the xw. It features a light-shielding diaphragm at the most effective position to drastically reduce internal reflections for a brighter, higher-contrast image. It works well to block extaneous light.

Each eyepiece is NOT the same exact design,they have different number of elements and configuration based on what is optimal for each focal length. It comes with a wide range of magnifications to choose from, the xw series accommodates a wide range of both casual and specialized applications.

• Advanced light-shielding technology for improved image contrast
• Huge view of the sky with eye relief you will rarely find elsewhere
• Very comfortable to use for long time observing

Best plossel Eyepiece: Astromania 40 mm 2 inch Eyepiece

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If you often find yourself scrambling for appropriate and satisfactory eyepiece, astromania 40 mm 2 inch eyepiece is your end point. These eyepieces provide you with a range of 9 focal lengths. They decide whether you can see the fine spiral arms of m51, and be able to make out a minor planet that is right at the telescope's performance limit. It comes equipped with a soft rubber eyecup.

It comes with long focal length telescopes, so there is little choice if you want low magnification. The low magnification means this eyepiece is also great for locating faint objects. It comes with 21mm of eye relief, and the eyepiece provides extremely comfortable viewing.

• You are guaranteed to find the right magnification and increments for your telescope
• Rubber fold-down eyecups to protect against stray light
• Good brand reputation