What is the main advantage of the Starlight Instruments TRUE 3.0" focuser?
The primary advantage is its TRUE 3.0" clear aperture. This ensures that large format camera sensors are fully illuminated without vignetting, which can be a problem with smaller focusers when using field flatteners or reducers. Its 15-17 pound lifting capacity and rack and pinion drive also provide superior, slip-free support for heavy imaging equipment.
What else do I need to mount the TRUE 3.0" focuser on my telescope?
This product is the focuser body only. To attach it to your telescope and use accessories, you will need to purchase two additional items: a telescope-specific tube adapter ring and an end cap (such as a 2" compression ring or a threaded adapter for your camera). These are sold separately to ensure compatibility with your specific setup.
Can the Starlight Instruments TRUE 3.0" focuser handle my heavy astrophotography setup?
Yes. With a lifting capacity of 15-17 pounds and a helical rack and pinion drive, it is specifically designed to handle heavy loads without slipping or flexing. It can easily support a large format cooled CMOS or CCD camera, a heavy filter wheel, and an off-axis guider simultaneously.
How do I choose between the 1.5" and 3.5" travel options for the Feather Touch TRUE 3.0" focuser?
The choice depends on your telescope and imaging train.
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1.5" (38.10mm) Travel: This is the most common option and is sufficient for most reflector and refractor setups where the focus point doesn't change dramatically between different accessories.
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3.5" Travel: This option provides a much longer range of focus travel. It is beneficial for telescopes with a large focus range or for users who switch between complex imaging trains and visual setups with very different focal points.
Will this focuser work on my large Dobsonian for visual observing with a Tele Vue Nagler eyepiece?
Absolutely. While optimized for imaging, the Feather Touch TRUE 3.0" provides an exceptionally smooth and precise focusing experience for visual use. Its robust build is more than capable of handling large, heavy eyepieces like a 31mm Nagler, and the 10:1 fine focus control is a significant upgrade for achieving perfect sharpness at high magnification on planets like Jupiter or Saturn.
How does the 360-degree rotation on the TRUE 3.0" focuser work?
The focuser body sits inside a telescope-specific adapter ring (sold separately). By loosening the lock screws on the adapter, you can rotate the entire focuser assembly smoothly to any orientation. This allows you to frame your astrophoto perfectly without having to rotate your camera and potentially disrupt cable management.
