Adapter for the UFC system:
- Telescope side with mounting plate and screws for the UFC base
- Camera side with T2 internal thread, especially for ZWO ASI cameras with T2a thread and 6.5mm back focus (ASI T2 internal thread ring unscrewed)
The Universal Filter Changer, UFC: The Baader UFC system is a filter drawer that can be used for a wide variety of telescope and camera systems with a sufficiently large connection diameter, which is also extremely short but also accommodates filter sizes up to 50x50mm without vignetting. These properties are a prerequisite for the new, fast optics such as e.g. B. EdgeHD telescopes with Hyperstar and the new RASA devices from Celestron, as well as all other Prime-Focus astrographs with suitable filters, where a regular filter wheel would shade too much of the front opening. In addition, prime focus optics are inevitably equipped with a very short back focus and require a particularly space-saving filter drawer.
The UFC system can connect almost anything to anything by purchasing the same basic filter package and then simply selecting the necessary UFC front and back plates along with the spacer rings as required by the particular chip spacing. For this purpose, Baader offers a set with suitable UFC extension sleeves, as well as an S70 VariLock extension, which is continuously adjustable from 15mm to 20mm, in order to keep the distance between the filter and the image plane as short as possible. All components are optimized to get the greatest possible passage in front of the actual filter drawer and still be able to precisely set the right distance between the telescope and the chip. The filter drawer itself sits as close as possible in front of the camera, and shadowing from the filters is minimized.