SV135 Zoom Eyepiece 1.25inch 7mm to 21mm 57°-40° Field of View for Astronomical Observation

Bought it a year back I think, and its served me well ever since then! Ive seen albedo features on mars, the rings of saturn and the cassini division, and a transit on jupiter! Its not only good for planets, but good on DSOs too! Its great for getting more detail on galaxies and nebulae, and makes it easy to pick out planetary nebulae from starfields. One issue though; The eyecup is terrible, and its VERY hard to fold down. Over time, it becomes so brittle that you cant fold it down without ripping it in many places. Other than that, the optical quality is great, and so is the zooming action.

I had this when I started out with visual astronomy and recently purchased this for my daughter for her new telescope. It makes things so unbelievably easy for her age to just “plug and play”. I highly recommend if you want an easy viewing experience for yourself or others.

It arrived quickly and in perfect condition. It is very nicely manufactured by Svbony, and it functions very smoothly. There is little refocusing needed along the entire zoom range. It is tack sharp at all powers with very nice eye relief. I am 100% happy with my purchase and can very highly recommend this lens.

This is my honest review: The Svbony SV135 Telescope Eyepiece Zoom, 1.25inch 7-21mm Zoom Eyepiece, FMC 6 Element 4 Group Telescope Lens The Svbony SV135 Telescope Eyepiece Zoom, 1.25inch 7-21mm Zoom Eyepiece, FMC 6 Element 4 Group Telescope Lens. Out of the box, it looks and feels very well made and solid construction and this is my first zoom lens. Its great to see it comes with: glasses friendly foldable soft rubber eye up and 18mm - 16.3mm long eye relief provide comfortable long term viewing for people with or without glasses. The anti-skid rubber thread design that can prevent accidentally falling and it is more comfortable for you to hold it. Fully Multi-Coated Green Film (FMC) broadband optical glass lenses provides clear image. Fully multi coated film maximize the light transmission and minimizes internal reflection and maximizes contrast. It has 6 elements in 4 groups structure design delivers crisp and sharp images. The 57 degree to 40 degree apparent field of view provides comfortable wide viewing for long time use. I can’t wait to use this on a clear night and do some testing of it, I can’t recommend it without using it. But on the specs it looks great for any visual astronomer to have. I will try to get out the back garden, when I can able to…. Then I will of course let you all know what I think of it then. Keep Safe When Observing & Happy Clear Skies!

When I bought my first telescope they told me to buy a good quality eyepiece because the gear will change but the Eyepiece won't. So i tried this optic and it's simply amazing. The first thing to catch your eye is for sure the zoom, it's very smooth and precise, also 7-21mm is a great range and it will help you to find perfectly your target. Talking about the quality of costruction the aluminium gives very good feelings same theng for the rubber bands around it that helps you to zoom really precisely. The imaging quality is stunning considering the price of this eyepiece, yesterday I was able to whatch jupiter whit his satellites. Overall This is a fantastic Eyepiece for beginners and for expert astronomers, It will surely amaze you like It did to me.

Arrived earlier than expected with the economy delivery. Zoom is excellent, very sharp, good contrast and barlows well. Big improvement from the stock eyepieces that came with the telescope. Couldn't recommend enough!

I did some quick tests of this, the 8-24, and some other eyepieces. This one was the biggest surprise. Construction and optical quality were way above my expectation. Not only that, it is also light and relatively small. The 8-24 is a big, heavy piece of equipment, but this 7-21 seemed to perform better optically, especially at the zoom extremes. The only caveat is the narrow field of view, but for wide views, I would say it's better to get a single focal length, wide angle eyepiece, and to use the zoom for everything else.

I hope SVbony will not mind me writing this review. This eyepiece was one of my first lenses, as I was still fresh into astronomy and its still one of my favorites to this day!! I originally bought this eyepiece because I didn't know which size of lens to buy and by purchasing this zoom lens you get 5 different rates of magnification ranging from 21mm to 7mm so its like have 5 eyepieces in 1. Its now my GoTo lens when it comes to just picking up a lens and go. I use it at star parties or when I cant be bothered to carry a large big bag of telescope lens. You can see my video on Youtube my chanle is Mans Hobbs & interests