Baader UFC S70 Varilock 15-20mm

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Baader Planetarium

 Please see Technical Specifications for more detail about each part!

The Baader-UFC is the priceworthy answer to an ever growing problem. New camera-models come to market in ever increasing speed. Spacers between telescope and camera don“_t support the correct distance or are subjected to torsion due to their flimsy design and heavy cameras. And the owner may want to change the telescope - or use several OTAs, but does not want to purchase new filters and filter sliders all the time. The Baader-UFC is a (seemingly) simple answer to a complex problem. It is made in the typical Baader-way, trying to connect each and everything in the most elegant and flexure-free manner.

The filter chamber (UFC-Base) is the core part, which up to now does accept three different kinds of filter sliders for 2"/ for 50 mm round and for 50x50 mm filter sizes. 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.
Versatile application for almost any telescope / camera.

The camera-side of the UFC-Base (the filter-chamber) remains open towards the camera - until the matching camera-adapter gets mounted directly onto the UFC-Base. The purpose of this is to have the 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-proprietory S 70-dovetail-adapters and spacers. A number of rigid UFC-S 70 spacer tubes is available in 5/15/40 mm length , as well as an ultra-stable S 70 VARI-LOCK spacer, engraved with Millimeter scale and being seamlessly adjustable from 15 to 20 mm. These four spacers will allow precise adaption with almost any backfocus situation, for both - back and prime focus - instrument configurations. Please accept the six tiny set screws, they are dearly necessary at times, when correct spacing becomes difficult. Each joint must be able to rotate, while requiring only a minimum of optical length.

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 we even mill this RASA/S70 adapter plate from stainless steel, 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 #2459134 and the retaining flange #2459121, as well as one of the many step-rings of the Hyperion-ring-system (#2958028 - 2958082) to be found here. Note that filters ought to be mounted in reverse order when using the UFC-filter changer in front of camera lenses.

Part NumberDescription
2459110UFC Base (Filter Chamber) with receptor for S70 Dovetail
2459112UFC 2" Filter Slider M48 (for cell mounted 2" filters)
2459113UFC Filter Slider D50 (for filter 0 50mm up to 50.5mm)
2459114UFC Filter Slider 50x50  (for filtersize 50 x 50mm up to 50.5mm square)
2459115UFC T-Adapter, connects to camera T-Ring with Mounting plate for UFC Base
2459116UFC M48 Adapter, M48 (m) thread facing camera with Mounting plate for UFC base
2459117UFC M54 Adapter,M54x0.75(m) thread facing camera w/ Mounting plate for UFC Base
2459118UFC M68 Adapter,M68 x 1 (f) thread facing camera w/mounting plate for UFC Base
2459119UFC protective EOS T-Ring Adap,S52 dovetail connects to T-Ring w/ Mounting plate 
2459120UFC 2" SC Adapter, 2" (m) thread facing camera w/ Mounting plate for UFC Base
2459122UFC FLI Adapter, connects to FLI camera, for ML and PL Flange w/Mounting plate
2459126UFC S70 / 11"/ 14" RASA Adapter, RASA Plate facing telescope w/S70 Dovetail
2459127UFC S70 / M68 Adapter, M68 (m) thread facing telescope w/S70 Dovetail
2459128UFC S70 / 2" Adapter, 2" SC thread (f) facing telescope w/S70 Dovetail
2459129UFC  S70 / M48 Adapter, M48 (f) thread facing telescope w/S70 Dovetail
2459130UFC S70 / T-2 Adapter, T-2  (f) thread facing telescope w/S70 Dovetail
2459131UFC S70 / C8 Hyperstar / SC / HD Adapter with S70 Dovetail
2459132UFC S70 / C11 / C9.25 Hyperstar / SC /HD Adapter with S70 Dovetail
2459133UFC S70 / C14 Hyperstar / SC/ HD Adapter with S70 Dovetail
2459141UFC S70/5 Extension 5mm with S70 Dovetail/Dovetail-clamp-screws
2459142UFC S70/15 Extension 15mm with S70 Dovetail/Dovetail-clamp-screws
2459143UFC S70/40 Extension 40mm with S70 Dovetail/Dovetail-clamp-screws
2459145UFC S70 Varilock 15-20mm with S70 Dovetail and receptor for S70 Dovetail
2459121UFC Straylight Flange when mounting UFC in front of camera lenses incl Mounting plate for UFC Base
2459134UFC SP54 for adapting UFC Base onto camera lenses (requires Baader Hyperion lens adapter rings)
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