OPT 2" Crayford Focuser for Refractor Telescopes

OPT 2" Crayford Focuser for Refractor Telescopes
$155.95
Item # OS-CF-CRF
8 Questions(s)

In Stock

  • This OPT 2" Crayford Focuser for Refractor Telescopes rotates a full 360 degrees for better observing.
  • Designed to fit refractor telescopes.
  • A 10:1 fine adjustment knob on this OPT 2" Crayford Focuser for Refractor Telescopes allows for superior fine tuning without slippage for an extended period of time.
  • Includes 1.25" adapter.
  • This OPT 2" Crayford Focuser for Refractor Telescopes is custom CNC machined from aluminum and black anodized for superior aesthetics in a dependable and durable unit.
Description

Details

OPT 2" Crayford Focuser for Refractor Telescopes


This OPT Dual-Speed Linear Focuser for Refractor telescopes features the most recent innovation in focuser design to hit the astronomy market in recent years. Designed specifically to meet the heavier equipment and stability requirements of astrophotography and heavy eyepieces, the linear stability and repeatable quality of focus reached with this focuser will keep you coming back for more spectacular views of and sharper images of the night sky!

Built with an innovative stainless steel rail system that provides extended, consistent, and linear contact with the focusing mechanism and the inside of the focuser body, even when the focuser is fully extended. This constant contact prevents slop from building up in the focuser drawtube. The result is zero flexure throughout the focus travel range, even in the worst case scenario when the focuser is parallel to the ground and carrying a heavy load such as a large CCD camera. This new linear bearing rail system also allows for the use of heavier loads up to 9 lbs.

A 10:1 fine adjustment knob gives the user superior fine-tuning ability with remarkable stability for an extended period of time. The focuser position can be locked in place with the large thumbscrew on top of the focuser for critical imaging applications. The underside of the focuser features another screw to control the focusing tension. A laser-etched measurement scale in the drawtube helps with consistently rapid focusing. This focuser also has 360º rotation ability so that it can be turned in any direction for better observing. However, the rotation may not be smooth over the entire 360º as this is a relatively weak feature of this focuser.

Connects with refractor tubes via three M4 screws (not included) spaced 120º apart on the flange. Although, the original screws included with your old focuser will likely work with this Crayford focuser. To install, simply remove your old focuser before sliding in this new Crayford focuser and screwing it onto the OTA. Be sure to check to see if you have the ability to remove your old focuser from the telescope tube before you buy this focuser. Custom CNC machined from aluminum and black anodized for superior aesthetics in a dependable and durable unit.

2" extension tubes are available separately to provide enough out-focus travel to reach focus with all of your eyepieces and accessories.

OPT 2" Crayford Focuser for Refractor Telescopes Specifications...


  • Base flange diameter: 86.6mm
  • Minimum focuser height (without 1.25" adapter and including flange): 4.3" or 109mm
  • Maximum focuser height (without 1.25" adapter and including flange): 6.3" or 160mm
  • 1.25" adapter height: 0.39"
  • Flange length: 0.59"
  • Tube travel: 2"
  • Outside diameter of drawtube: 2.32"
  • Steel rail width: 0.56"
  • Weight: 30.6 oz.
  • Focus knob diameter: 1.57"
  • Microfocus knob diameter: 1.06"
  • Measurement scale on focuser drawtube: Yes
  • Rotatable: Yes
  • Dust plug: 1.25" dust plug included


OPT Product Number: CF-CRF
Additional Information

Additional Information

SKU OS-CF-CRF
Manufacturer OPT
Focuser Design Crayford
Focuser or Mask Size 2" Drawtube
Warranty 1 Year Warranty
Reviews
Included Items

Included Items

  • OPT 2" Crayford Focuser for Refractor Telescopes
  • 1.25" Adapter
  • (86mm) Base Plate Adapter
Questions & Answers

Product Questions

Will this fit a Celestron C6R?
5
Will this focuser work with my Celestron Advanced VX 6 refractor? I will be attaching a Cannon Rebel DSLR.
4
I am attempting an upgrade of Orion 80mm ShortTube refractor and i need to know if this will fit it ?
4
Fit Celestron or Vixen C102F?
2
How about a replacement focuser for Vixen ED80SF.
0
can i use this on my meade starnavigator 102?
-3
Hi will this fit my 120mm Refractor I'm not sure of the brand but it the same as the Saxon 120mm x 900mm frac.
I think the connection is 86 mm at the point were the focuser meets the tube does that sound right.
also if this isn't available maybe the orion will do the same job I do want the linear bearing though
any help much appreciated. Brad
-5
I recently purchased a Celestron 80mm Guidescope from OPT. I am not at all pleased with the stock rack and pinion focuser. Will this focuser fit as a replacement?
-8
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