I've just swapped out the prism diagonal supplied on my newly purchased Skymax 127 AZ5 deluxe for this. Using my finder scope alignment marker... a "public footpath" sign on a ridge exactly one half mile away, the wording was much clearer with the Di-Electric and quite legible. Can't even see the sign with the naked eye, so recommend the scope as well! With the Baader Hyperion Zoom I bought to replace the suppled 10&25mm, the image was brighter at all settings. Not had chance with the night sky yet but looking good. I'm keeping the prism for terrestrial use tho as the sign now reads "htaptoof cilbup" 😉. But the mirror does keep the image upright. Recommended... as are the team at FLO and many thanks to Alex for his patient emails helping out this noob!

Awesome service as always! What an upgrade from the standard diagonal!

I bought this to replace a diagonal prism that came with my Skymax 127 and have to say the results are extremely pleasing; it delivers good contrast and brighter views. It's an excellent diagonal with a metal body that gives the feel of quality. I would definitely recommend this product and purchasing from FLO - they are super helpful and give exceptional customer service.

I wanted a decent 1.25" diagonal as my 2" is very heavy. I took a chance on this one and I can honestly say I am not disappointed. Excellent build quality, nice design with compression rings so as not to damage accessory barrels. Far far better than standard diagonals. Seems more reflective than some other mirror diagonals I had in the past but I have no real way of measuring it.

I would honestly recommend this to anyone wishing to replace the substandard rubbish that comes with most scopes. * * * * *

I wanted a 1.25 inch diagonal with a compression ring rather than one with the standard set screw that marks eyepiece barrels, and originally decided on the William Optics Erecting prism with the helical fine focusser. However reading the about the issues with diffraction spikes made me think again and I decided instead to go for this Sky-Watcher di-electric mirror diagonal, foregoing the bonus of the fine focusser.

Its of all metal construction and looks and feels nicely put together, a big step up in quality to the standard issue Sky-Watcher diagonals supplied with my Skymax 127 Mak and Startravel 102 Refractor.

My ancient eyes can't see any difference in light transmission between this and the standard diagonal, however i'm more than happy with it.