93573 Dielectric Star Diagonal 2" with Twist Lock

I do not have an expensive telescope (a 5" Maksutov) but the telescope glass is pretty good. The problem is the 5" aperture which only allows so much light to come in. This means the optics attached to the telescope need to be as high quality as you can afford so you can get all the light possible to the eyepiece. For this I purchased Celestron's dielectric star diagonal because it is much better than the original cheap diaganol. It is easy to work with, too, because of the special twist lock it has which lets me change eyepieces easily and safely. I'm surprised more amateur astronomers don't start with buying a better diagonal like this one. When I upgrade my telescope the Celestron Star Diaganol can work with the new scope too.

I have the Celestron Evolution 8 telescope. It came with the 1.25" diagonal and it worked. I had been reading that the 2" would increase the viewing area (along with a 2" eyepiece) so I decided to take a gamble and I'm glad I did. Not only did it increase the viewing area, it made the images sharper. Again, don't know if it is the diagonal or the 2" Luminos eyepiece (31mm) but I am very happy with this upgrade.

Great quality and a nice improvement over the stock one that came with my telescope. Fit perfectly into a celestron 6se.

Optics seem excellent. I also love the locking style 2 inch and 1.25 adapter. One thing I think could be improved is that when screwing it on to the back of the OTA there is a very fine line between having it loose so that the diagonal is not secure and having it so tight that it is very hard to get off. This purchase actually caused me to go buy a set of strap wrenches for this issue. Of course the strap wrenches work fine but it is still a bit odd to me how easy it is to over or under tighten.

Love the jump from the stock 1.25" diagonal to this monster! Even better when adding 2" eyepieces, but so cool that I can use my 1.25" EPs as well. Love the twist lock feature. Makes it very simple to swap EPs, and they are held confidently in place. Totally worth it!

Excelente. Se nota la diferencia con respecto a diagonales ordinarias. Hecha con materiales de calidad y excelente acabado.

Excellent

Excellent item ,fast shipping.

This is an investment for any serious optical observer. If you have a CCD camera and want to see photons real-time instead. You may wish to look through this. If you have a Newtonian Reflector, you probably would not have looked at this item. Is it expensive ?, well, not if you want that extra brightness and contrast. Any SCT/Catadioptric user shall spot the difference. Be it improving a town view or dark sky experience, I would recommend. I have a Celestron Nexstar 8SE, and can see the difference on comparable nights of visual "seeing". I saw, noted, in other reviews, that difficult to use with a focal reducer (f6.3) Not so for me. This may be the 2 inch version. No problem with the 1.25 inch. My experience... Very good Comets/nebulae... brightness enhanced. Not an essential item, but I noticed the differnce.

Gran construcción y diseño perfecto. Funcionamiento confiable y muy buena óptica

Solid piece of kit. Well built.

A must have of you own 1.25 and 2 inch eyepieces

天頂ミラーの方向を簡単に変更できるよう、C8 にbaader の2インチClicklockアダプターを付けて使用。天頂ミラースリーブに2インチフィルターを付けられるので、付属の1.25インチアダプター使用時に別途フィルターを用意する必要がない。光学性能は特に問題なし。