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Spectrum Optical Instruments

SpectrumOI Aspherical Eyepiece Set 1.25" 4mm, 10mm, & 23mm, Fully-Coated Eyepieces for Telescope for Kids 8-12, Telescope Accessories

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$39.99 Why this price?
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Availability: Only 10 left in stock, order soon!
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Arrives Sunday, Apr 26
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Features

  • Full Coated OpticsThis premium eyepiece set features three fully coated optics glass eyepieces for high light transmission and excellent image contrast. These excellent optic quality gives maximum detail and definition across the entire field of view with minimum distortion. The optical design also provides extremely low chromatic aberration.
  • Standard 1.25" EyepieceThis set of eyepieces features a precision made standard 1.25" barrel for any telescope that has accept 1.25'' diameter eyepiece. The metal 1.25" eyepiece barrels are threaded to accept filters.
  • 3 Focal LengthThis telescope eyepiece set comes with 3 different eyepieces, 4mm, 10mm, and 23mm. These eyepieces offer high magnification allows you to look more closely and more detailed at the Moon's crater, other planets, and other celestial objects.
  • Standard Filter ThreadThese eyepieces feature standard M28.5 x 0.6 female thread size for adapting 1.25" astronomy filters. They work with all the 1.25" astronomy filter on the market.
  • Three Year WarrantyBuy with confidence from a California-based brand. Your purchase includes a comprehensive three year limited warranty and unlimited access to our technical support experts located in California. We have a list of videos for easy step of setting up the binoculars, if you have any technical issue with your product, please don't hesitate to contact our friendly customer service team, and we will get back to you within 24 horus!

Description

Unlock the wonders of the cosmos with this set of 1.25 inch aspherical telescope eyepieces. Crafted with precision optics, these eyepieces deliver stunning clarity and contrast, allowing you to explore the depths of the night sky with remarkable detail. The aspherical design minimizes spherical aberrations, providing sharp, high-resolution images across the entire field of view. Whether you're observing planets, nebulae, or distant galaxies, these eyepieces will elevate your astronomical experience. With a focal length of approximately 32 mm (1.25 inches), they offer a wide apparent field of view, perfect for capturing breathtaking vistas of celestial objects. Versatile and compatible with most 1.25 inch telescope focusers, this set of eyepieces is an essential addition to any stargazer's toolkit. Immerse yourself in the captivating beauty of the universe and let these eyepieces transport you on an unforgettable journey through the cosmos.

Brand: Spectrum Optical Instruments


Model Name: SOIA0007


Eye Piece Lens Description: Aspherical


Objective Lens Diameter: 4 Millimeters


Telescope Mount Description: Altazimuth Mount


Product Dimensions: 2"D x 1.25"W x 1.25"H


Focus Type: Fixed Focus


Power Source: Manual Operation


Finderscope: Straight-Through


Item Weight: 0.4 Pounds


Product Dimensions: 2 x 1.25 x 1.25 inches


Item Weight: 6.4 ounces


Item model number: SOIA0007


Batteries: Unknown batteries required.


Date First Available: June 6, 2024


Manufacturer: Spectrum Optical Instruments


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Apr 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Decent Eye Pieces
For the price, this is a good set of eyepieces. I bought a used telescope for my kid that didn't have any eyepieces. This is a good starter set to expand her interest in space. They aren't the best, but still very good for the price. I have better ones that cost a lot more, but these perform well for the price. They are easy to use and slid right into the telescope without issue. ... show more
Reviewed in the United States on April 7, 2025 by Shawn
    • Good budget eyepiece set.
If you need some eyepieces and money's tight, this set might just fit the bill. The set is good, but not great. Build quality is as you would expect at this price range. Most of the parts are plastic, however the lenses are glass. This is certainly a step up from the cheap eyepieces that used to come with entry level scopes when I first got into the hobby back in the 1980s. As other reviewers have mentioned, the 4mm is the weak link. It's not a very good eyepiece. Right off the bat I noticed that the eye lenses of the 4mm and 10mm look to be the same size. If you hate tiny eye lenses, as I do, you might think that this is a plus. However, this is due to the 4mm having an internal barlow element to boost the power. This arrangement is quite common on short focal length eyepieces, and if done well it gives you a high power eyepiece that's comfortable to use. Unfortunately with cheaper eyepieces, it's usually not done well. In this case, it's not done well. Performance is poor. That aside, the two longer focal length eyepiece are good, with the 23mm being the standout. It's actually a very nice eyepiece. It performs well, and gives you a fairly wide field of view. For the $39.99 price at the time of my typing this review, this eyepiece set is a pretty good deal. If you shop around, you might be able to find a better deal. Or, you could just go with the 23mm and 10mm. Overall, I'm happy with them. ... show more
Reviewed in the United States on November 7, 2024 by Mr. Customer
    • SpectrumOI Aspherical Eyepiece Set 1.25"
I couldn't wait to get these telescope lenses. I got my son a telescope a few years ago and I use it more than he does. My favorite thing to do is stargaze all year long. This year the sky is so pretty and has been almost always clear since the beginning of October. The only lens I had was a 23mm which is decent magnification, I wanted more. Of course, these show up today and the sky is cloudy for the first time in weeks, hopefully, the sky will clear up this evening. I tested these out birdwatching and they work well. With my telescope, 4mm is the clearest with the most magnification. These are easy to view. These would work well with a phone camera mount because none of them have black rubber eye guards. With just viewing the trees and birds I feel these are decent quality, they're much better than what I had. These cost the same as what I paid for one 23mm lens. You get: (1) 23mm lens (1) 10mm lens (1) 4mm lens Storage Box with a Foam Insert with Cutouts for Lens Storage- it is a nice sturdy box, it would make a great gift All of the lenses have protective caps on either end. These are a good value and I would recommend ... show more
Reviewed in the United States on October 31, 2024 by Luna
    • Economy eyepiece set
Review Image by Jon Bosley Jon Bosley
Review Image by Jon Bosley Jon Bosley
Review Image by Jon Bosley Jon Bosley
Review Image by Jon Bosley Jon Bosley
This is a nicely boxed set of three economy eyepieces each one with both top and bottom plastic covers. These 62° eyepieces are available through a number of different brands but essentially the same. I am not sure why this vendor is targeting them towards children? The three focal lengths supplied here are 22mm, 10mm and a high powered 4mm. The first two are the most useful but all are predominately plastic in construction but with glass lenses. They are internally blacked to help with reflections and contrast which is good. The rubber eye guards do not turn up. The 4mm is the same as the 10mm however it contains a rather poor quality internal barlow lens. This is done to help increase eye relief at the expense of contrast and image quality. Overall this would make a decent outreach set, especially the 22 mm and 10 mm eyepieces. The 4mm is more situational with requiring a more short focal length telescope. A 6mm without the barlow element would be more useful. If the lens housing was not of plastic in construction I would give more stars. ... show more
Reviewed in the United States on November 22, 2024 by Jon Bosley Jon Bosley
    • On par with eye pieces included with a Celestron StarGuide telescope
Review Image by SVC Dude SVC Dude
Review Image by SVC Dude SVC Dude
Review Image by SVC Dude SVC Dude
I found that these SpectrumOI eyepieces are well made, and for a set of three it is a good reasonable price. Compared to the original 20mm and 10mm eyepieces that came with my telescope, I found these to be of similar optical quality, with a slight preference to the original eyepieces. Of all of them, I'd have to say 20mm is probably my favorite in terms of field of view, clarity and brightness. the 4mm was unique in terms of the level of magnification, but it is really difficult to get the target in view, and then really difficult to see it as it is quite dim. It was good for me to calibrate that my existing eyepieces are not junk, and these are likely an upgrade for someone whose telescope came with really cheap lenses. ... show more
Reviewed in the United States on January 9, 2025 by SVC Dude SVC Dude
    • Great gift for telescope hobby
My son enjoys his telescope so I got him this as a gift. Its standard size and fits his telescope. It's a different size than what his came with. I think the 4mm eyepiece really brightens up the stars in view.
Reviewed in the United States on January 1, 2025 by gamedayfan
    • Really good views
As others have mentioned, the 4mm gets pretty blurry, but the rest are great. I expected this regardless of quality as the 4mm would have provided way more magnification than my telescope can clearly accommodate. I expect about 204x max magnification with my telescope and the 10mm gives around 260x. This is even a little blurry but clear enough to make out bands on Jupiter ... show more
Reviewed in the United States on December 8, 2024 by GingerNerd

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