Dark Clear Skies introduce its Erect Roof Prism Diagonal
Erect Roof Prism Diagonal Specifications:
- Barrel Size: 1.25 inches
- Viewing Angle: 45 degrees
- Prism Material: BK7
- Coating: Multi-coated
- Housing: Aluminium with anodized finish
ZWO Seestar S30 Pro Smart Telescope – Automated Astrophotography & Night Sky Imaging
As expected from Pegasus Astro.
I've used one before for camera lenses and wide field imaging. This longer one is for my 90mm triplet refractor. I find Setting 1 works well most of the time, saving a bit of power. You only need to warm things to a fraction above dewpoint to stay dew-free.