Tag Archives: star diagonal

Can you use a star diagonal on a Newtonian reflector telescope

A star diagonal is not recommended for use on a Newtonian reflector telescope. This is simply because there may not be enough inward travel to get infinity focus. You may be able to get around this by using a low … Continue reading

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What is a star diagonal

A star diagonal is a prism or mirror set to direct light at a 90-degree angle to the telescope’s optical axis. It’s an ergonomic accessory to make viewing of the sky more convenient and comfortable for objects nearly overhead or … Continue reading

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