William Optics 50mm Right Angle Correct Image Finder with Bracket # M-FB50

From William Optics! A unique 50mm finder OTA with a 90-deg erecting prism diagonal with helical focuser providing a right angle correct image. Use standard 1.25" eyepieces* to get the magnification and field of view you like!

Optical Features

• Fully multi coated 50mm f/4 (focal length = 200mm) achromatic objective
• 90-deg high-quality erecting prism diagonal included
• Provides 10x magnification with a 20mm eyepiece or 8x with a 25mm eyepiece
• Eyepiece not included

Mechanical Features

• 1.25" diagonal features helical focusing with 15mm (0.59") of focus travel
• Diagonal / eyepiece are rotatable
• White powder painted with excellent fit and finish that are the hallmark of every William Optics product

Mechanical Specifications

• Tube diameter = 54.6mm (2.15"); Dewshield diameter = 58.1mm (2.29")
• Tube weight (without eyepiece) = 15.9oz (451g)

Finder Rings / Bracket

• 6-point 50mm finder bracket with delrin tipped screws included
• Dovetail base/screw to mount bracket on all William Optics refractors included
• Bracket can also be mounted on other telescopes that use a 5mm or 6mm mounting screw; not compatible with Vixen/Synta-style base
• Bracket weight = 9.5oz (269g)

* Note that not all eyepieces will reach focus in this or any other finder due to the limited focus travel range. Finding a compatible eyepiece that reaches focus may require some trial and error. This is an issue with any finder/spotting scope/guidescope that can accept external eyepieces, and not just with this item.