How does the Feather Touch Micro Focuser FTM-CPC8 improve focusing on a Celestron C8 EdgeHD?
On a C8 EdgeHD, which is a flat-field imaging scope, achieving perfect focus is critical. The FTM-CPC8 provides a dual-speed mechanism that allows for extremely fine adjustments, eliminating the image shift and mirror flop inherent in the stock focuser. This makes it possible to achieve sharp, stable focus for both high-resolution imaging and visual observation of planets like Jupiter and Saturn.
How do I know if this Feather Touch Micro Focuser will fit my Celestron SCT?
You must visually inspect the rear cell of your telescope. This model, the FTM-CPC8, is designed for Celestron scopes that have a triangular pattern on the back. If your telescope has a flat back, you will need the standard "C" version instead. This model is confirmed to fit the CPC-800, RASA 8", NexStar 6SE, and C8 EdgeHD with the correct back plate.
Does the FTM-CPC8 Micro Focuser completely eliminate SCT image shift?
It eliminates image shift during fine focusing. You will still use the telescope's original knob for large, coarse focus adjustments, which may still exhibit some shift. However, once you are close to focus, you switch to the Feather Touch's fine-focus knob, which makes adjustments so precisely that it does not cause the mirror to shift, allowing you to finalize focus perfectly.
Is the Starlight Instruments Micro Focuser difficult to install?
No, installation is straightforward and can typically be completed in a few minutes using simple hand tools. The Micro Focuser is designed as a direct replacement for the stock focuser knob assembly. Detailed instructions are included and available for download.
Is this FTM-CPC8 focuser upgrade necessary for visual observing or just for imaging?
While it is considered essential for imaging, the Feather Touch Focuser is a dramatic upgrade for visual observers as well. At high magnifications on planets or double stars, the ability to make tiny, precise focus adjustments without the image jumping around the field of view makes for a much more satisfying and effective observing session.
Will this focuser help me achieve sharp focus on Jupiter's cloud bands with my Sky-Watcher 180mm Mak?
Absolutely. The Sky-Watcher 180mm Mak is a powerful planetary instrument, but its long focal length makes precise focusing critical. The dual-speed control of the Feather Touch FTM-CPC8 allows you to make the minute adjustments needed to resolve fine details like the Great Red Spot, shadow transits, and individual cloud bands on Jupiter, which is often impossible with the stock single-speed focuser.
