Best Budget Diagonal?

[Donkeiller]

Looking to upgrade my diagonal. Currently have a Revelation 1.25" 99% dielectric. Nice and light and gives good images, but I don't like the fact it uses a screw to secure the EPs.

Any suggestions for a diagonal of equal performance that uses a compression ring? - Looking to pay arounf £60

[Damo636]

I had one of these and found it excellent.

First Light Optics - William Optics 1.25" Carbon Fibre Dielectric Diagonal

[John]

The William Optics 1.25" is very good quality in every respect but it does have a small design issue in that there is a rather thick internal ring holding the eyepiece drawtube onto the diagonal body. This makes for a solid join but does cause some vignetting of the outer edges of the field of view when you are using eyepieces with large diameter field stops such as a 32mm plossl, 24mm Panoptics / Hyperion or a 16mm Nagler / UWAN If you are not using such eye pieces then it's a good choice.

[arbacia]

Dielelectric diagonals from William Optics, Moon Fish and Long Perng are the same (as far as I know, Long Perg is the original manufacturer but I can be wrong). At least in Spain, Long-Perng is cheaper (20-30€ cheaper). I had several of them. For the cost they are pretty good ones but, as John said, the clear aperture of these diagonals are not the maximun.

[Donkeiller]

Thanks Guys. I had been considering the WO diagonal.

Does the Skywatcher

SkyWatcher Deluxe Dielectric 90 Degree Star Diagonal 1.25"

diagonal have any problems such as vignetting with longer focal length EPS?

[arbacia]

That is the same as WO, LP and Moonfish. Get the cheaper.

Patricio

[John]

As Patrico says, these are all clones of each other so you might as well go for the lowest cost one.

The Revelation 1.25" is another clone but less expensive than the Skywatcher:

Telescope House Revelation Dielectric 99% Quartz 1.25" Diagonal

[arbacia]

and remember that the carbon fiber sides of the WO is cosmetic.

[Donkeiller]

As Patrico says, these are all clones of each other so you might as well go for the lowest cost one.

The Revelation 1.25" is another clone but less expensive than the Skywatcher:

Telescope House Revelation Dielectric 99% Quartz 1.25" Diagonal

Had a quick look- doesn't look like it has a compression ring..

[John]

Had a quick look- doesn't look like it has a compression ring..

That's a good point - it doesn't

I had one for a while and it was excellent optically and lacked the thick ring that the William Optics clones have. But no compression ring, unfortunately.