SVBONY Telescope Lens 4mm Telescopes Eyepieces Wide Angle 62 Degree Aspheric Eyepiece Fully Coated lens for 1.25" 31.7mm Astronomic Telescopes

Good quality, I could see Alpha Centauri A and B both with this eyepiece on the other hand 20mm and 10mm eyepieces couldn't separate this twin star adequately enough. Cons: I found a small dark spot in its optics but it did not hinder the view substantially. Will try it on Jupiter and Saturn asap. Bang for buck

Nice to eye relief

Excellent. Center portion CA well controlled. Nice to see highly magnified image, pls note brightness will reduce according to magnification

I tried it for several nights. Tried to capture mainly 3 planets. Jupiter, Saturn, Mars. Saturn was a bit blurry but you could identify the rings and the gap between rings and planet. Jupiter and Mars were blurred like you are focussing on something very close, and the image was never narrowed down to a sharp image.

Really surprised at the overall quality of this very inexpensive eyepiece! Really good apparent field of view (AFOV) of 62 degrees and sharp stars across the entire field. Only thing that could be better is the eye relief, to get the full AFOV your eye has to be very close to the lens. However, this is the 4mm which is a high power eyepiece and the eye relief for this level of magnification naturally won't be good. But still, the nearness of my eye to the main lens is not THAT bad and again, very pleased with this product.

comparado con el SVbony FF9158A, este no tiene un buen enfoque, usando mi Orion Observer 114 de longitud focal 500, llego a 125X con este al igual de con el FF9158A, pero obtengo unos bordes muy malos de marte con este ocular, el FF9158A me da una mejor imagen.

Muito boa essa ocular

Bought this for my 5” and 8” Dobsonian telescopes and the quality is excellent. Super happy.

good, just rare i can use this level of effective magnification. was able to see the rings of saturn and jupiters bands.