This 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. TPO 2 inch Crayford Focuser for Refractor Telescopes Specifications...
- Base flange diameter: 86mm
- 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