This is a solid and well made piece of kit. Have used it with an 80mm ED refractor and an 180mm Mak. A clear improvement in image quality and brightness over a range of magnifications (visual observation of Jupiter) in both telescopes when compared to my previous 'dielectric' diagonal. Clearly not all 'dielectrics' are made equal!. Highly recommended.

Well constructed of metal and fibreglass and much brighter than the mainly plastic one that came with my telescope. Highly recommended, especially for anyone with a small-aperture telescope that needs all the light you can get. Super-fast dispatch and delivery from FLO.

Improved views through my 'classic' (!) 50 years old Prinz Astral 550 refractor. Recommended, as are FLO - great service.

Great optics and a clear upgrade from diagonal that came with scope. Feels very well made & substantial to last for years. Good value too.
Brilliant service, as always, from FLO.

Bought to replace the cheap plastic diagonal that comes with most telescopes, a lot of beginner telescopes are dismissed as rubbish or useless but when you upgrade the diagonal and eyepieces its surprising how much it improves the experience.

This is a top premium product that will last and once purchased it can be used for future telescopes you buy.

Flo are fantastic, never had a bad experience with all the items I have bought, highly recommend.

I bought a Skywatcher Skymax 127 a few weeks ago as my first OTA... I had studied many forums and watched hours of YouTube in deciding which scope to invest in... I decided on a MAK as it’s great for planetary and Lunar viewing and also because it’s a compact and ‘easy to use’ device. I was delighted with the performance of the scope but, inevitably, after using it a few times I wondered if I could make a few improvements by replacing some of the included ‘accessories’. The supplied 25mm EP was quite good but the Skywatcher 10mm EP was horrible so, on the recommendation of FLO, I purchased a couple of BST eyepieces and discovered just how ‘average’ the supplied EPs were! I also replaced the finder scope with a Baader Red Dot Finder and that also was a marked improvement. Then it occurred to me that the optics in the OTA were superb and also the new BST eyepiece was great but sat in between them was the ‘stock’ Skywatcher Diagonal. After spending hours on forums (again) I was a little unclear as to whether buying a high-quality Diagonal would be worth the investment. In the end I decided to go for it, especially as the William Optics Diagonal had some great reviews for build quality and they are renowned for producing excellent optics.
I thought there might be some improvement but the difference, compared to the supplied Skywatcher item, is quite dramatic... looking at rooftops about a mile away it’s a crystal clear image, where before it was ok but not really filling the full eyepiece with a quality image, it’s also so much brighter...
I’ve yet to get a clear sky to try it out at night but it’s just obvious that it’s going to be a big improvement...
A few people on blogs are sceptical about this upgrade but for my Skymax 127, which has great optics in the tube, it’s really allowing the OTA to do it’s job... Brilliant!
If you have a Skymax 127 or you are considering buying one then fitting this diagonal is simply a no-brainer; it dramatically improves on an, already, good viewing experience and turns it into something quite special.
A lot of experienced people on various forums will claim that the improvement with a diagonal upgrade is small but on my Skymax 127 it has transformed what you see in the eyepiece...
I also now have an item that can be used with a high-end scope in the future... happy days...

Quality diagonal that delivers improved performance. Definite increase in brightness in the viewed image, and a good choice as an upgrade to the supplied star diagonal.

Not been used much due to cloudy skies locally. Excellent quality build as you would expect from this provider. Wonderful customer service as always from FLO, thanks all!

Exactly what you would expect from William Optics. Well designed and beautifully made.

First purchase from FLO, faultless transaction, fast and efficient. Just purchased more items. Highly recommended. Thank you.