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William Optics 50mm Right Angle Correct Image Finder with Bracket # M-FB50E

5.0 (2 Reviews) Read Reviews Write Review
Brand William Optics
Part Number M-FB50E
Availability available

Product Info

Manufacturer Description

Here is William Optics' complete 50mm finder and guidescope kit in one complete package! Depending on your application, just use the 1.25" diagonal or extension tube with the main finder. This set contains:

  • 50mm finder optical tube
  • 1.25" 90-deg erecting prism diagonal with helical focuser for use as a right angle finder
  • 1.25" extension tube with helical focuser for CCD autoguiding

Optical Features

  • Fully multi coated 50mm f/4 (focal length = 200mm) achromatic objective
  • Right Angle Finder Mode:
    • 1.25" 90-deg high-quality erecting prism diagonal included for use as a right angle finder
    • Provides 10x magnification with a 20mm eyepiece or 8x with a 25mm eyepiece
  • Straight-Through Guider Mode:
    • Designed for use with small-chip CCD autoguider cameras having a 1.25" nosepiece
    • Can be used as a straight-through optical finder but most eyepieces will require a separate 0.5"-1" extension tube to reach focus.
  • Eyepiece not included

Mechanical Features

  • Right Angle Finder Mode:
    • 1.25" diagonal features helical focusing with 15mm (0.59") of focus travel
    • Diagonal / eyepiece are rotatable
  • Straight-Through Guider Mode:
    • 1.25" holder features brass compression ring and 3 locking screws to securely hold your camera
    • Helical focusing with 15mm (0.59") of focus travel (be careful not to exceed this or the eyepiece holder will separate from the finder)
    • Holder / camera 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 (with diagonal / without eyepiece) = 15.9oz (451g)
  • Tube weight (with CCD extension tube / without camera) = 15.0oz (425g)

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.

Reviews

5.0 (Based on 2 Reviews) 50% of reviewers recommended this product.
Rating Distribution
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    1. Guest

      Skill Level
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      Time with Product
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      User Notes:
      Review by Jason S.
      1509895480
      Nov 5, 2017

      5.0 William Optics 50mm Finder / Guide Scope

      Pros:

      Cons:

      Comments:

      As expected with any William Optics product, build quality and optical quality is top notch. Agena Astro provided fast shipping and a good price.
      The provided mounting ring assembly matched well with my WO 132FLT and my AT12RC telescopes. This scope makes it easy to find Go-To alignment stars. The 90 degree diagonal provides an upright, sharp, and bright view but I did find my old Meade 12mm reticle eyepiece would not achieve focus as it needed more in-travel. Five other eyepieces I tried all worked OK. As a guider you use the straight-thru adapter. The helical focuser does rotate the camera but I found if I loosened the thumb screws I could focus without rotating the camera. Once focus is achieved the provided ring locks it all down for a rigid guide platform. If you want a light-weight guide scope with great optical and mechanical quality this is a good choice.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

    2. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Globcracker of San Juan Island.
      1409961600
      Sep 5, 2014

      5.0 Triple Duty Finder Scope

      Pros:

      Easy to Use,Strong Construction,Accurate,Compact,Quality Lenses,Lightweight

      Cons:

      Comments:

      I bought this as an aid for astro-imaging to more easily sight my targets, especially at zenith. I already respect William Optics' quality and this item is a good example of it. Matched with the 24mm Agena 1.25" Wireless Illuminated Reticle Eyepiece, its a terrific finder. Add the WO helical extension tube/focuser and it can double as a tracking scope for guided imaging. Unhook it and just mount it to a tripod and it makes a super portable hiking scope. There are less expensive finders out there but none with this combination of quality and versatility.

      Bottom Line: Would you recommend this item? No
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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