Cart 0

William Optics

1.25" 90-deg Erecting Prism Diagonal Helical Focusing (M-P90)

  • 7500

This item is out of stock but you can place an order now and we’ll ship when it becomes available.


1.25" 90-deg Erecting Prism Diagonal with Helical Focusing

For use only with 50mm CCD guidescope to convert guidescope into a right angle correct image finderscope. Diagonal features a helical focusing

mechanism in the eyepiece holder with 15mm of focus travel.


Weight: 190g

Customer Experiences



Our Zero-Risk

Telescope Upgrade Path

For our customers who dream of expanding their horizons and gazing deeper into the night sky, we offer personalized telescope upgrade paths. Learn More> 

Shop For...