1.25-Inch Telescope Eyepiece Set, 4mm 10mm 20mm

These are fine.

I bought these eyepieces for my 150mm reflective telescope. It worked pretty well. The 20mm one results a good field of view just covering the 4 Galilean satellites of Jupiter. The 4mm one reveals the stripes of Jupiter. The 10mm, however, had a serious artifact. Fortunately, I got a good replacement promptly after the returning process. Overall, I’m pleased with the quality and the price.

They are obviously not the same as the $100+ ones but for the price they will last me for a long time and are just fine for my setup and matched quality or better than 99.99% of telescope lenses to be honest. I don't have a 2k+ dollar teliscope and I doubt you do either if you're r reading this. 😂 The images are from a sub $100 teliscope with a crappy tripod taken by a camera that is honestly by far the most expensive thing through the smallest lens and the largest, using the projection method (look up camera teliscope adaptors if you have questions about methods).

I got these for my newly acquired Celestron telescope. It was second hand and was missing the eye piece. I ordered these because it’s a 3 pack with multiple magnifications and they fit and work great!

These are perfect.

Used these for a telescope I got at a rummage sale

I needed some inexpensive eyepieces for a small (50mm) telescope I keep on a tripod. This is my “grab and go” scope, something I can have ready to view in minutes to check something interesting in the sky without taking the time to set up a larger telescope. At around $11 each, they’re as cheap an eyepiece as you’ll find. But how good are they? Mechanically they’re very well made for the money, with all-steel barrels, rubber eyecups, matte black interior coating and chrome plating. Optically, well, they have some issues. I’m not sure what optical design these use. My first guess was that they’re Kellenrs, owing to the narrow field of view (compared to Plossls) and the extremely short eye relief, but the seller responded to muni query saying “type is H, no K.” H is Huygens, a very old (17th Century!) design consisting of two Plano-convex lenses. The design works well in long focus (f/15 or longer) telescopes, moderately well in f/10 to f/12 telescopes, and not at all well in the short focus telescopes popular today. My first tests were with a 60mm f/6 ED refractor, but once I learned these were Huygens eyepieces I realized that wasn’t going to work. Using an adapter I was able to try these in my f/14.2 Questar. The 20mm is not bad, with good color correction and a flat field. The short eye relief makes the 10mm difficult to use and the 4mm extremely difficult to use. If you ever looked through a 1960s-era Unitron telescope with the supplied Ramsden eyepieces, you know what this is like. You can’t wear glasses while using any of these, so if you have serious astigmatism you can rule these out. The 4mm requires you to get uncomfortably close, with your eye almost touching the outermost element. So then, are these good for anything? Maybe. If you have an older refractor telescope, like a 1960s Tasco or a Monolux, with a good glass objective lenses, a long focal length, and a 1.25” focuser, that’s missing the eyepieces, this would be a good replacement or upgrade. Still, I think you’d be better off paying a few dollars more and getting a couple of $20 Plossl eyepieces in 20-24m. and 10-12mm focal lengths.

They were a quick replacement for my lost celestron set. They do what they need to but there not high quality.

best value for money and extremely well made eyepieces.

Exactly what you would expect. Well built, won’t out perform the more expensive lenses but an excellent choice for beginners .

A good set for a beginner

Well made sturdy pieces

I got my kid a used telescope for Christmas, but it did not come with eye pieces. I found this set, and purchased it on the reviews and price. This set is amazing, my kid loves looking at the moon through his telescope. Yes, you could buy better eye pieces, but for a 7 year old, these work just fine for his needs right now.