Baader UFC (Universal Filter Changer) with S70 dovetail

The filter chamber (UFC-Base) is the core part, which up to now does accept three different kinds of filter sliders for 50,8mm,  50mm round and 50x50 mm filters. The filter sliders are kept in place by means of an adjustable magnet, to adjust the retaining force and to assure exact repositioning of the filter for repeatable usage of flats. A brass-pin mounted onto the far side of the filter-slider. This pin is sticking out at the opposite side of the filter chamber. The pin enables an easy eject of the filter slider without pulling on the filter slider, to not endanger the precise telescope position during exchange of filter sliders.

UFC filter slider lets you insert in a very fast and easy way different types of filter changer that are availble for mounted 50,8mm filters (max. 6mm height), as well as unmounted 50.4mm round and 50x50 square filters. Just one "click" onto the brass-pin releases the filter holder from the magnetic fixture. Afterwards it can be removed easily.

In camera-side, the UFC filter chamber has connections to install adapters to connect cameras with different threads. In this way you can use filters mounted with minimum distance to the image sensor, avoiding additional vignetting.

The telescope-side of the UFC-base carries a receptor with 6 clamp screws in 60° spacings, to mount all the Baader S 70-dovetail-adapters and spacers. A number of rigid UFC-S 70 extensions is available in 5/15/40 mm length, as well as an ultra-stable S 70 VARI-LOCK extension, engraved with millimeter scale and being seamlessly adjustable from 15 to 20mm. These four extensions will allow precise adaption with almost any backfocus situation.

Another set of telescope-adapters, with the male S70 dovetail facing the camera-side, completes the assortment, enabling the user to mount the UFC-assy onto almost any telescope firmly and flexure free. For the RASA-adaptation Baader has the stainless steel RASA/S70 adapter plate, in order to provide the necessary stiffness while retaining the extremely thin flange tolerances required for the RASA-design.

For any telescope, for any camera - just replace the corresponding adapters on either side of the filter chamber when you change telescope or camera and want to keep on using your trusted set of filters.

As added benefit any camera lens can be used with the UFC. In this case, the UFC-Base will be fastened in front of the camera-lens with adding both the S70/SP54 adapter BP2459134 and the retaining flange BP2459121, as well as one of the many step-rings of the Hyperion-ring-system (BP2958028 - BP2958082). Note that filters ought to be mounted in reverse order when using the UFC-filter changer in front of camera lenses.