Optec TCF-S3i Temperature-Compensating Fosuser (Price Reduced!)

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Optec 3" temperature-compensating focuser controlled directly from a laptop or PC. Control software can be downloaded from the Optec website. An ASCOM driver can be downloaded to operate the focuser with other software. Originally purchased in October of 2014 and used on a 5" refractor. It has a few minor scratches from normal use, but otherwise is clean, in good condition and fully functional.

Included with the focuser are the temperature probe (with a foam pad for attaching to scope), Optec focuser-to-computer USB cable, DC power supply, Optec Model 17816 3-inch adjustable extender tube (for achieving proper backfocus), Optec Model 17804 3" to 2" reducing adapter, and small hex nut driver. Operating Manual can be downloaded from the Optec website. You can order the appropriate adapter from Optec to mount it to your scope, or get one custom made by PreciseParts.

This is an excellent focuser. With a bit of calibration, it can automatically adjust the focus over a wide range of temperatures. This is very useful when you're doing an entire night of imaging.

Seller pays shipping (UPS Ground) to CONUS. PayPal or Credit Card.