Diagonal (90° / 90 Degree) Prism Diagonal (1.25″) for Telescope


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1.25″ Prism Diagonal for Telescope

Now back in stock!  These extremely popular 1.25″ diagonals impressed with the quality metal build and fine machining.  Don’t put up with a terrible diagonal a minute longer!

One end goes into the Telescope – A 1.25″ eyepiece into the other.


• 1.25″ 90 Degree Prism Diagonal
• Simple and Effective Design for improved viewing comfort
• Blackened, strong stray light control
• Superb reflectivity (99%+!)
• Very High Quality Prism
• Solid, well machined
• These are genuinely shipped from our Brisbane warehouse – delivery within days!

Are these good?  Yes!  These prism diagonals have excellent reflectivity!  Our customers love these.  We are confident you will too.

Why use a prism diagonal over a mirror diagonal?  Prism diagonals are preferred for slower focal ratios (f/6+) – Prisms have a shorter optical path, meaning that if you can’t rake out the focuser in enough to reach focus, a prism diagonal may help.

Weight .12 kg
Dimensions 15 × 13 × 10 cm

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