[Profiler (Profiler)]

Hi Matt & Steffen

To be honest I am not sure about prisms.

The conventional rule of thumb is that prisms are better for long fls (eg over say f10) while mirrors are better at lower fl's (eg f9 and below).

Tak have a reputation which can't be questioned especially around their refractors - however I have often wondered if you removed their name, screw lip tensioner around the Ep barrel - would the actual prism inside be any different to the prisms found in the mass produced prism diagonals which come with many celestron scopes etc and sell for about $40

What I do notice is that the WO (aka Orion) and Televue 1.25 diagonals seldom come up for sale - these diagonals very clearly claim to contain a dielectric mirror inside.

Alas - while there is much comment about who supplies WO their raw products (such as LP) WO do claim to also manufacturer a lot of their own stuff - so in the case of the 1.25 diagonal I simply don't know if it is the same produced by LP with instead a little swan logo in WO case. I should clarify I am talking about the WO 1.25 90 degree mirror diagonal and not the prism diagonals that Wo also have.

Anyhow - does anyone have by any chance a WO/Orion/Televue or even tak diagonal they might consider selling?