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Instructions
Protective T-Ring CANON EOS
Protective T-Ring for CANON EOS
#2958550
(basic version: T-Ring without filter)
(scope of delivery e.g. version 2958550C – with built-in clear protective filter
TM
with Phantom Group
multi-coating
Instructions for use:
as of 11/11
The Protective T-ring for the Canon EOS allows Baader filters to be used with a T-ring,
providing the largest possible free aperture of 47.3mm (M48 thread), and protecting the camera
body from dust and humidity. To allow optimal use of the Protective T-ring, several versions of
it are now available with a built-in 50.8mmx3mm or 50.4mmx 3mm Baader filter.
The Protective T-ring not only offers exposures free from vignetting with extremely short focal
length telescopes, it can also be universally connected. Four different types of telescope
connection are included. The adapters of our Astro T-2 system can be used for many other
types of mounting onto a large range of telescopes.
After carefully examining the CANON bayonet fitting we have optimized the fit and tolerances
between the camera bayonet and T-ring. The result is the Protective T-ring, which is wobble-
free and has no lateral play thus always guaranteeing a stable image platform, even for long
exposures or when the telescope slews.
The Protective T-ring replaces other built-in camera filters which are installed directly into the
camera body. All unmounted 50.8mm or 50.4mm Baader filters, and Baader 2" filters mounted
in low-profile filter cells (LPFC) may be used with the Protective T-ring. (LPFC describes all
Baader filter mountings where the effective overall height of the filter cell is not more than 6
mm).
21.11.2011
Page 1
G:\Anl\Baa\Zub\Protective\ProtectiveT-Ring-CanonEOS-e.doc
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Related Manuals for Baader Planetarium 2958550
Summary of Contents for Baader Planetarium 2958550
- Page 1 Instructions Protective T-Ring CANON EOS Protective T-Ring for CANON EOS #2958550 (basic version: T-Ring without filter) (scope of delivery e.g. version 2958550C – with built-in clear protective filter with Phantom Group multi-coating Instructions for use: as of 11/11 The Protective T-ring for the Canon EOS allows Baader filters to be used with a T-ring, providing the largest possible free aperture of 47.3mm (M48 thread), and protecting the camera...
- Page 2 Instructions Protective T-Ring CANON EOS The glass thickness (3mm) of the built-in 50.8x3mm filter is taken into account in the mechanical construction. The resulting effective overall optical length for each CANON EOS camera thus amounts to 55mm - precisely the overall optical length of standard T-rings. If, instead of a 3mm thick filter, a normal Baader 2"...
- Page 3 Instructions Protective T-Ring CANON EOS Fig. 3: Illustration: Protective T-Ring for Canon EOS with 2" socket (S52/2") Changing the filter: To change the filter, loosen the 6 grub screws on the side of the unit by means of the 1.5mm Allen key supplied.
- Page 4 Instructions Protective T-Ring CANON EOS Applications: Fig. 4: Protective T-Ring for CANON EOS, with 50.8mm clear protection filter, Delrin temperature compensation ring, S52/M48 adapter and M48/T-2 insert ring Fig. 5: Protective T-Ring for CANON EOS with 50.8mm clear protection filter, Delrin temperature compensation ring and S52/2"...
- Page 5 Instructions Protective T-Ring CANON EOS Fig. 6: Protective T-Ring for CANON EOS, shown with Baader 2" clear protection filter in low profile filter mounting, S52/M48 adapter and M48/T-2 insert ring Fig. 7: Protective T-Ring for CANON EOS, shown Baader 2" clear protection filter in low profile filter mounting and S52/M48 adapter ring 21.11.2011 Page 5...
- Page 6 Instructions Protective T-Ring CANON EOS Fig. 8: The Protective T-ring is supplied with inserted S52/M48 ring and with the M48/T-2 reducing ring screwed in. The connector socket S52/2" is separate. To employ the M48 thread instead of the T-2 thread to attach the Protective T-ring to your setup, simply undo the loosely attached M48/T-2 insert ring by using two fingers in the slots provided...