SVBONYTelescope Eyepiece Fully Multi Coated 1.25 inches Telescope Lens 66 Degree Ultra Wide Angle HD Telescope Accessory (6mm 9mm 15mm 20mm)

This review is for the gold rimmed 20mm eyepieces.I've been looking through telescopes for a very long time and this eyepiece gives you a lot of bang for the buck!I bought two to use in my large binoculars and they have not disappointment me at all. The eye relief is very nice and I wear glasses. They are bright and clear and easy to look through. I did not measure the FOV, but it is wide and comfortable. I had originally tried the 9mm red rimmed ones, but the eye relief was not good for me so I returned them. I think the Gold rimmed ones are the way to go! The Gold rimmed ones seated perfectly and securely in my binoculars with no wobble whatsoever. I am 100% confident they will stay locked in the eyepiece holders of my binos which are APM 70-90's. They work great.I rated these with five stars because overall they are worth this rating.The only reason of concern would be that there is a small bit of aberration at the very edges. This is really negligible, but worth noting if you are looking for edge to edge perfection.You won't regret your purchase if you go with the Gold rimmed ones! i am very happy and plan to buy the 15mm ones next.

So among the things I couldn't mention in the title are that the top lens in the eyepiece (the one you put your eye to) is nice and large, so you're not squinting through a small hole. I had a great night for viewing last night (clear skies and little atmospheric turbulence) so I took my Apertura AD8 (8in Dobsonian) out with this eyepiece to gaze at Saturn and Jupiter ( apologize that my phone was not cooperating for through the lens shots). Saturn was sharp, Cassini's division was clear, and I could easily see some cloud banding, and 2 of its moons. Jupiter was clear and sharp with cloud banding clearly visible and 5 moons easily identified. Just for fun - I pushed my telescope to it max usable magnification by putting in a good 2x Barlow, and this eyepiece. It held up well. the focus snapped and the images were bigger - unfortunately, the atmospheric turbulence was also amplified. But the views were still glorious and elicited many excited and awed noises from my wife when she gazed through the eyepiece. I'm just an amateur without the free funds to dump hundreds of dollars per eyepiece. I'm a front yard astronomer on clear nights. I also wear glasses - which is why the eye relief is important to me, so I can keep my glasses on while viewing. This 6mm eyepiece really impressed me, and it was worth every penny of the 35$ price tag and then some. I'll be buying more of the Sbvony wide eyepieces in the future to start replacing the older style eyepieces leftover from my previous Meade telescope with small eyeholes and no eye relief.

I have some kellner and plossl eyepieces. I also have Barlows 2x and 3x. And now I have this amazing eyepiece. What you read from some critics about the characteristics of lenses and Barlows, will too often confuse you and often will lead you astray from buying a great piece of equipment that you probably would thoroughly enjoy if had not decided to forego the purchase based on their opinions. I truly believe that some critics opinions are simply parroting what others have said for fear of reprisal, and they have never really tried the product themselves. For example, I have found that the 3x Meade Barlow has become my most often used attachment. It is superb and I don't even use my Orion shorty 2x anymore. The so-called loss of light compared to a 2x is nonexistent and not worth talking about when you are using it out in the field. Also, I see no difference in my Plossl vs. Kellner. Yes, the eye relief for the plossl is closer to the eyepiece but it works so much better when I attach that lens to my android cell phone camera. I can just set the lens right on the camera lens with the holding carriage (the optical lenses on both are recessed and won't get scratched) . You don't need to adjust the lens position away from the camera due to a longer exit pupil found with a non plossl. Now lets talk about this Ultraview lens. You would almost think that something has to give if you are using an eyepiece that is going to give you good eye relief with wide viewing at only 6mm! I bought it for the sole purpose of finding out what have they given up to achieve all of this. They have given up nothing. This lens has an amazing wide view, good eye relief with quality clarity that even excelled the same power with any other combinations or single lens that I have. The lens is a longer device even longer than my 3x Meade Barlow. The only negative about this lens is that it will take almost one month coming from China before you have it in your hot little hands. Your patience will be rewarded. This lens will make some of my other combinations go onto the shelf. As I use it more, I will find out what new combinations will work best and quicker in the field.

Decent eyepiece for scopes I sell, better than the junk they are normally sold with.