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Starboosa All Aluminum Frame - 1.25" Roof Erecting Prism
Explore the cosmos with our upgraded 1.25 inch telescope eyepiece, featuring a wide-angle view, comfortable soft eyecups, and superior image clarity for both seasoned astronomers and newcomers alike.
- Wide Field of View: Enjoy a 52-degree field of view that improves clarity and increases eye relief, giving you a broader and clearer perspective of the night sky.
- Compatibility: Our eyepiece supports all types of telescopes, including reflectors and refractors, offering flexibility and convenience for all your astronomical needs.
- Superior Image Quality: The flat image plane and well-balanced chromatic aberration correction result in sharp, clear images. Made from high-grade optical glass, the lens provides excellent contrast and a clear field of view.
Getting Started - This guide will help you get the most out of your new eyepiece.
Attach the Eyepiece
- Remove the protective caps from both ends of the eyepiece.
- Insert the eyepiece into the focuser or diagonal of your telescope.
- Secure it in place using the locking screws on your telescope.
Focusing:
- Look through the eyepiece and adjust the focus knob on your telescope until the image becomes sharp and clear.
- The 40mm focal length allows you to see objects at various distances and sizes clearly.
Observing
- Aim your telescope at the celestial object you wish to observe.
- The wide 52-degree field of view will enhance your ability to observe star clusters, the moon, the sky, and planets in great detail.
What's Included
- 1.25-inch (31.7mm) diameter eyepiece
- Soft eyecup
- Protective caps for both ends of the eyepiece
Features
- Focal Length: 40mm
- Field of View: 52 degrees
- Optical Glass: High-grade with multi-coating
- Compatibility: Fits all types of telescopes (reflectors and refractors)
Maintenance and Care
Cleaning:
- Use a soft, lint-free cloth to clean the lens.
- Avoid touching the lens with your fingers.
- If necessary, use a small amount of lens cleaner designed for optical glass.
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Daniel Johnson
2025-08-12 16:50:42
Perfect for looking at star clusters
Sandra
2025-04-07 13:05:07
Great clarity and sturdy
David Dorrell
2025-03-04 16:51:28
Review of Starboosa Telescope Eyepiece 40mm 52 ° - Wide Angle Eyepieces - 1.25 inch Eyepieces - Soft Eyecup is Included [40mm eyepieces]The weather on the day it came was unseasonably warm and a bit hazy with patchy clouds. I was anxious to give this a try so I waited until dark, took my 90mm x 700mm telescope outside and brought along my 25 mm lens in addition to this 40 mm for comparison. The moon was out at about 3/4 moon stage, which diminishes deep sky viewing by adding more light, coupled with haze and patchy clouds only a few of the brighter stars could be spotted. Jupiter was visible as well.So first I lined up the moon, easily spotted in this new fast eyepiece (fast and slow are used to describe how quickly you can center an object you are searching for at low magnification, this eyepiece allows for doing that very quickly). The moon was sharp and clear once focused. I switched eyepieces to my 25 mm lens and the moon appeared much larger, confirming the new eyepiece as much lower magnification, but much higher field of view.Then I found Jupiter, again very easily done without using the finder scope. It was obviously Jupiter because I could clearly make out the moons, very sharply in the new eyepiece even at the lower magnification.Now with the telescope focused on a distant object (Jupiter) I aimed it upward, just generally towards hazy, but cloudless area since the clouds obscured finding specific areas of stars just to see what I could see through the moonlit haze. Dozens of stars were visible! I looked at the area with my naked eye and could only see one or two of the brightest stars, but through this eyepiece dozens of less bright stars appeared.Anxious to try this again on a dark sky night!As for the construction, the eyepiece barrel is substantial and made of metal with a rubbery grip area, the optical properties are quite good, the image was sharp and clear to the edges, all coated optics. As I said, I found the performance impressive. It comes with two dust covers one for each end.One minor point, and I may be just unfamiliar with typical construction, the rubber eyecup came off when I tried to remove the eye side dust cover. I was able to easily put it back on indoors in the light, but I always thought those were glued on. No matter, I’ll just be more careful, or glue it on.Nice eyepiece, I like it!
Book Gnome
2025-03-03 15:51:32
I wasn’t familiar with the Starboosa brand and ordered this economy eyepiece with some hesitation. However, lower magnification eyepieces like this big 40mm usually don’t reveal their optical flaws the way higher power lenses do, so I had high hopes. Unfortunately, I still ended up disappointed. Using a good quality mid-level telescope (an Orion SkyQuest XT8 Plus), I was able to compare this eyepiece directly with a CelticBird 40mm and a Neewer 32mm Plössl eyepiece. The Neewer was best, the CelticBird (which needed an eyepiece extension to focus) was second, and this Starboosa was third despite a very bright image. The main issue with the Starboosa was a marked amount of optical astigmatism (star shaped lens flare) which was quite conspicuous and quite distracting — this actually turned out to be the worst eyepiece in my collection! Another minor annoyance was that the top lens cap does not fit the rubber eyecup. As a result the eyecup was distorted when my eyepiece arrived, and even setting it out in the sun for an hour to soften it never took away the distortion. My entire experience with this Starboosa eyepiece was negative, and I will not be buying another. Go with a Neewer or other well-rated economy brand eyepiece instead.
Gearmaster
2025-02-10 14:09:36
I have a budget 70x400mm refractor telescope, and the eyepiece lenses that came with it are not the best, so I ordered this Starboosa as an upgrade for a wider field of view. I also recently ordered a Neewer 25mm eyepiece and was impressed with that one, so I was expecting similar quality from the Starboosa. I judge an item not only by its function, but my first impression of the quality out of the box.As soon as I took this lens out of the box, I was not impressed with initial quality, especially compared to my Neewer lens (I will post a side-by side picture). The rubbery band on the housing of the Starboosa was askew and it’s a little too large for the lens and keeps slipping out of its notch. The eyecup and lens cover had fallen off the lens (I was able to put the eyecup back on), and the lens cover fits only over the extended rubber eyepiece, not the lens housing itself, which deformed the eyecup into a wavy pattern. The lens is also a much tighter fit in my telescope than my Neewer lens, so much so that I have to do quite a bit of fiddling to keep it straight so that it slides in place if I am doing a lot of switching back and forth between lenses.Despite my initial impressions, the quality of the glass is pretty good. For terrestrial objects I couldn’t tell much of a difference in the field of view with or without my Barlow lens, but for celestial objects I can see that there is a bit of a better field of view, and the colors are rich and tonal with a high contrast. Because of the low magnification, the images are nice and bright even for deeper sky objects which makes viewing the night sky more enjoyable.I do have two other minor nitpicks, however, with the understanding that this lens is only around thirty-five dollars and still somewhat of a budget eyepiece lens:- The eye-relief is not as good as I had hoped. My other lens has some give as to how far your eye can be from the eyepiece, but on this one, your eye must be positioned exactly in the correct place or else you won’t get a good sight picture, which is farther from the eyecup than I expected. It makes the rubber eyecup kind of a questionable feature because my eye socket is never nearly close enough to the eyecup to use it because of the eye relief.- Around the fringes of the field of view, the image distorts and is not as crisp or bright as the center of the lens, and you can see a bit of the sides of the eyepiece tube (granted, 40mm is probably too wide for a 1.25-inch eyepiece and is probably better suited for a 2-inch eyepiece).Despite my nitpicks, at the current price, I’d consider this as a 3.5-star eyepiece lens and a worthwhile upgrade to any budget refracting telescope as long as you understand the limitations and expect that there may be potentially questionable quality control.
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