William Optics NEW Super Quality 1.25" 90° Erect Prism - Upright-Correct Image
This William Optics 1.25" 90° erecting prism will be a joy to be used with that nice premium refractor of yours! It will be perfect for daytime observations too, because of its Upright-Correct Image. It is internally threaded and blackened to reduce stray light reflections.
This 90° William Optics NEW, Super Quality, 1.25" Erect Image Prism - Star Diagonal with an Upright-Correct Image uses an image-erecting BAK4 prism with an anti-reflection coating. This is a very high accuracy and high reflectivity prism optic. This Super Quality 1.25" 90° Erect Image Prism from William Optics also has a new feature which you will appreciate - it has a Helical Focusing feature on the top barrel which allows you to make fine-focus adjustments. Finally, it is threaded for accepting most 1.25" filters.
This William Optics 1.25", 90° erecting prism Star Diagonal is make from highest quality aluminum, black anodized, with a smooth exterior finish.
|Barrel Size:||For 1.25" Focuser receivers|
|Material:||Aluminum, Black Anodized|
|Form/Fit:||1.25" Star Diagonal (Prism)|
|Function:||A Prism Star Diagonal with Push-In Barrel, 1.25"|
|Image Orientation:||Correct (Erect) Image|
|Added Feature:||Helical Focusing Barrel|
|Inside Diameter:||Threaded for 1.25" filters|