There is no question how important it is to focus your astronomy system properly. Not only will precise focusing reveal optimal views, but it will ensure the highest possible image quality. Many focusing aids are adapters that connect a focuser to your optical tube assembly. This is particularly helpful if you plan on upgrading your focuser, as focuser adapters maintain your focuser's stability and reduce strain on your optical tube assembly.
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For example, the Explore Scientific T2 Mount DSLR to 2" Focuser Adapter allows you to attach a DSLR/SLR-T mount to a 2” focuser drawtube diagonal adapter and is compatible with T Ring adapters from both Canon and Nikon.
A Bahtinov mask is a must-have for every astrophotographer. This mask attaches to the front of the scope's objective lens to show the observer how to precisely focus their telescope. The Batinov mask consists of three separate grids that produce three angled diffraction spikes when the telescope is pointed at a bright star. As the focus changes, the spikes appear to move so the observer can determine if they should increase or decrease focus. Here at High Point, we have masks from Meade, Orion, William Optics, Farpoint, and Astrozap.
Another interesting focusing tool is a micron indicator kit. These kits give you a readout of your exact focus settings. This is great if you're working with CCD photography, which often requires indexing the exact focus position of your imaging system. A micron indicator kit will often connect to a computer so you can easily use the kit on your computer.
The Tele Vue 10 Micron Indicator Kit for Tele Vue 60is allows for precise indexing of the focus position for CCD photography and includes a digital LCD display with 10 micron accuracy. The readout can even be outputted to a PC via a standard RS-232 cable.
