- Rotation: 360 Degrees
- Tube Travel: 2 inch
- Fine Focus: Geared 10 to 1
- Size: 2 inch
TPO 2" Crayford Focuser for Refractor TelescopesThis TPO 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 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 360 rotation ability so that it can be turned in any direction for better observing. However, the rotation may not be smooth over the entire 360 as this is a relatively weak feature of this focuser.
Connects with refractor tubes via three M4 screws (not included) spaced 120 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 inch extension tubes are available separately to provide enough out-focus travel to reach focus with all of your eyepieces and accessories.
- Base flange diameter: 86.6mm
- Minimum focuser height (without 1.25 inch adapter and including flange): 4.3 inches or 109mm
- Maximum focuser height (without 1.25 inch adapter and including flange): 6.3 inches or 160mm
- 1.25 inch adapter height: 0.39 inches
- Flange length: 0.59 inches
- Tube travel: 2 inches
- Outside diameter of drawtube: 2.32 inches
- Steel rail width: 0.56 inches
- Weight: 30.6 oz.
- Focus knob diameter: 1.57 inches
- Microfocus knob diameter: 1.06 inches
- Measurement scale on focuser drawtube: Yes
- Rotatable: Yes
- Dust plug: 1.25 inch dust plug included
TPO Product Number: CF-CRF
Questions & AnswersAsk a Question
can i use this on my meade starnavigator 102?
We are waiting for information from Meade regarding the mounting surface attachments. A custom machined adapter will probably be required to interface this focuser with the scope.
I am attempting an upgrade of Orion 80mm ShortTube refractor and i need to know if this will fit it ?
Hello Andrey, I spoke to the manufacturer & most of the optical tubes for the Orion 80mm ShortTube refractor are 90mm outer diameter. If your optical tube has this outer diameter, it will likely work given that the part of the focuser that goes into the
What is the inside diameter of the glass?
The inside diameter of the glass is 47mm.
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?
I actually tried this focuser on the 80mm guidescope & it will work (meaning you can use the three screws that are on the original focuser on this new focuser) but it will not sit all the way into the optical tube because if you put this focuser all the w
Will this fit a Celestron C6R?
Unfortunately, no. This focuser has an 86mm diameter adapter that fits many of the Synta/Celestron 102mm refractors but not the C6R, which needs a larger diameter adapter.
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 o
This focuser is designed to fit ~86mm diameter attachments common to many brands of refractors coming from China/Taiwan. If your measurement of your flange inner diameter is accurate, then this should work for you.
Will this focuser work with my Celestron Advanced VX 6 refractor? I will be attaching a Cannon Rebel DSLR.
Unfortunately, no. This focuser has an OD of 86mm, meaning it fits inside 90mm diameter tubes. You would need a focuser with ~96mm OD to fit the stepdown collar on the back of the 6" refractor. Please contact us if you have questions on focuser upgrade
Fit Celestron or Vixen C102F?
Probably not, as this focuser has a flange diameter of 86.6mm and Celestron/Vixen typically use a 96mm flange on their 100mm diameter tubes for the C102F. You would need some sort of interface step down adapter.
How about a replacement focuser for Vixen ED80SF.
Unfortunately, this focuser will not fit as it has an 86mm flange for 90mm diameter tubes. The scope you are referencing has a 100mm diameter tube and needs a 96mm diameter connection.
What is the diameter of the flange that fits into the telescope tube?
Good afternoon and thanks for asking. The flange of the focuser is approximately 86mm in diameter.