TCF-S motorized Focuser 2" - Temperature Compensated Focusing with high Precision

Mechanically, the TCF-S is a robust Crayford style motorized focuser with high repeatability, no play and nearly zero backlash of only 0.0013 inch. The TCF-S has an integrated temperature sensor which transmits temperature changes to the controler to compensate focus changes.

The solution of Optec is ideal for all application where you need an exact focus like CCD-Images. A geared stepper motor rotates the drive shaft with one step rotation of the motor equal to a 0.000086 inch movement of the drawtube. So the precision of the focuser is much higher than your needs.

The unit adds 3.5 inches to the telescopes back-focus as measured from the front to the end of the drawtube when at the mid-focus position. The total travel of the drawtube is 0.6 inches or 7000 steps. A pair of pushbuttons control the direction of focus and the DRO (digital read-out) displays the current position.

The TCF-S focuser can easily handle cameras and instrument packages weighing up to 10 pounds. The TCF-S can be used by itself or with a PC for automatic focus with some of the popular camera control software.

The most important advantage of the TCF-S is its ability to compensate for the focal shift of the telescope due to temperature change. The image plane of the common SCT telescope with aluminium tube can change as much as 0.01 inch per degree Celsius. So the focus will change a lot and a unsharp image is the result. This would make long exposures difficult at best. The TCF-S dominates this problem and guarantees sharp images also at high temperature differences during exposureing.

Please contact us for the necessary adapter for your telescope / camera combination or additional acessories.


Delivery contains:

• 2" Crayford Focuser with Temperature Sensor
  
• Controller Box
  
• Software