Multi-Coated 0.5X Telescope Focal Reducer for 1.25 Inch Telescope Eyepieces

To be honest this one kind of surprised me and I thought I might be wasting my money especially after reading the reviews but it does work.Now I don't have a better quality one to compare it to but it gives me a wider field of view and the only distortion is around the edges which is 100% normal for a focuser. Maybe I just got a decent one but at 7 bucks it's not really much of a loss if you don't.

This reducer did not. I could see no difference when using it. Would return it, but it was so cheap, it is not worth the effort......Please note that since the reducer did not work on my optical tube, Starboosa refunded my money. Unexpected, but very nice!

Works very well with my Agena Wide 8mm eyepice.... With this reducer i was able to get the full sun in view with good image quality.... Threading for adding filters is done well.

Works excellent for astrophotography with my DSLR on a reflector telescope.

Newcomers to astronomy are typically attracted by high magnification, but often it’s a lot magnification and a wider angle you’re looking for. Viewing comets, for example- bright comets are often spread across a large segment of the sky. A well figured focus reducer will often have a secondary benefit of flattening the focal plane, which is very desirable for astrophotography. This lens, well... it failed on both counts.I tested it on two very fine telescopes: A short focus Televue Pronto, and a long focus, hand-figured Questar, a telescope with a 1/50th wavelength primary mirror. I used several good Televue and Brandon eyepieces with focal lengths from 12mm to 30mm for testing. While the lens did lower the magnification, it also had the effective of narrowing the usable field of view. I was not able to get the entire field in focus on either scope; it took from a quarter to half a turn of the focus knob to get from a sharp center to a sharp edge view.Even at the low asking price, this isn’t a very good buy, even for a very inexpensive scope. For around $30 you can buy an imported 28-32mm Plossl eyepiece that will deliver acceptable quality wide angle views, and I would recommend you go that route if you’re looking for wider angle views than the eyepieces supplied with your inexpensive telescope can provide.

To be fair maybe this wasn’t made for my type of telescope. I put this in a 6” sct and got very bad vignette and couldn’t really focus with my ZWO camera.

It worked for eyepieces only, to a degree. The focus from center to edge took almost half a turn of the focus wheel, meaning the entire field of view is not in focus. It did not work with my DSLR. Back focus might as well have been a mile away. Interestingly, it worked as a microscope for the DSLR though, that's why 3 stars. So cheap it's not worth sending back.

Works as stated