SVBONY SV135 Zoom Eyepiece, Zoom 7 to 21mm 1.25 inch Telescope Eyepiece, 6 Element 4 Group Telescope Accessories for Astronomic Telescopes Visual

This eyepiece helps cancel/absorb some light and allows for more clarity when viewing in the suburbs. (My backyard) After about 5 min adjusting eyes, many more distant items became visible with this eyepiece, than any other I have. The ability to zoom with 1 piece eliminates the hassle of changing, dropping, or looking for the next piece you want. Price point; this is a very good product that can replace 5 other eyepieces, or save some cash by only getting this 1 zoom. Happy star hunting.

To be fair, I don't have any experience with other Zoom eyepieces, but this SV135 model from SVBONY works very well. The title to this review is because you get 5 different focal lengths from 7mm to 21mm, and you can figure out what works best for you before you spend more money on individual eyepieces. Solid weight so it doesn't feel cheap, and very smooth movement when you twist to zoom. It comes with two rubber dust caps that fit nice and snug without being difficult to remove. Views through the eyepiece are sharp and clear, the only downside is you will need to adjust your telescope focuser slightly. There is also some reduction in field of view (i.e. how much of your target will fit in the eyepiece), but that isn't an issue. I have a few different products from SVBONY, and I am always impressed with their quality. If you are on a smaller budget, I highly recommend this zoom eyepiece.

Fantastic Value – Versatile and Clear Views! I am very impressed with the SVBONY SV135 eyepiece. For the price, it’s an absolute gem. The zoom range from 7–21 mm makes it incredibly convenient—I can switch magnifications without fumbling with multiple eyepieces in the dark. The zoom action is smooth, and the build quality feels solid and reliable. Optically, the views are sharp and clear. The Moon looks crisp, Jupiter’s bands are visible, and I was even able to catch details in the Orion Nebula. The eye relief is comfortable, and it works well with or without glasses. Of course, the field of view is narrower at the low end (21 mm), but it opens up nicely as you zoom in. For me, that’s a small trade-off considering the convenience and performance it delivers. Overall, this eyepiece has quickly become one of my favorites in my kit. Whether you’re a beginner or just want a versatile grab-and-go eyepiece, the SV135 is hard to beat. Highly recommended!

When I was looking at reviews I had seen other reviewers noting little imperfections (possibly dirt?) in the optics of these, so I looked for it straight off when I received mine, and sure enough it has a small black speck on the inside of one of the lenses. I would not have noticed it if I had not been looking for it, and I decided after trying it out that it affected my viewing pleasure insignificantly at this price point. If this was a $100 or up optic as all the other comparable zooms are I would not have tolerated it, but I am so happy with the overall build and performance of the zoom I decided not to worry about it. In normal use I don't even notice the speck, it takes intentionally looking for it for me to notice. I guess they need a cleaner work space or better air filtration or something where they assemble these, but I found nothing comparable at a comparable price anywhere (and I looked a lot) so I still recommend, though I also recommend a close inspection on arrival and actually using it to see if any imperfections affect your viewing experience. I use mine with a Meade StarPro AZ 70 f/10 for a 33x to 100x zoom range and it performs great throughout the range. If anyone is just getting started, looking for a great terrestrial viewer with an easy entry into planetary and moon viewing I am thrilled with the combination (I spent $200 combined - if you have a higher budget you might consider the larger StarPro 80, 90 or 102). Anyway, I love what I ended up with on a $200 budget and this zoom lens being priced so well has really lead to an even better overall experience than I expected on my limited budget. It's really simple to use and a lot of fun.

Very well made, another SVbony quality product !

I wish I had discovered a Zoom eyepiece earlier. It’s so convenient. I don’t even bother with my other eyepieces anymore. I’m sure people could argue for the advantages of swapping high-quality eyepieces out for each viewing experience, but for the most part, this works for so many view purposes.

Looks amazing at 21mm. Maybe I'm broken, but zooming in, becomes harder to focus. Used on Reflecting, refraction x2. Buying a 5mm now since I can't see with this 7mm

I should have bought this sooner!

Bought this to save swapping out eyepieces all the time. The focal range is great, the image is clear and it's very comfortable on the eye when viewing. I think it's exceptional value for the quality of the build and image through the eyepiece, and I'm finding this is my go-to eyepiece at the moment because it's so convenient. Well worth the money.

Un buon prodotto anzi ottimo per il prezzo che a

Sympatyczny maluch. Oczywiście jak każdy zoom zabiera trochę światła, ale poza tym optycznie jest co najmniej dobry, a biorąc pod uwagę cenę, nawet bardzo dobry. Lubię w nim płynną, a nie skokową zmianę powiększenia, dobrze dobrany - ani za mały, ani za duży - opór "potencjometru", całkiem spore pole widzenia i dobrą ostrość (najlepsza przy ogniskowej circa 16 mm), mechaniczną precyzję, no i to, co w każdym zoomie - brak konieczności zmiany okularów.

perfeito!

I used this zoom lens all the time, Finding objects at low mag, then zooming into high mag to look closely at the details. Way easier than changing a lens and losing the object. However, the zoom is a bit tight, and I find best to hold stationary with one hand while turning the zoom with the other.