Baader zero-tolerance protective Canon DSLR T-Ring T-2/M48 and 2"

Description Today's large sensor digital SLRs and advanced imaging techniques enable amateurs to take spectacular high resolution and long exposure images that push the limits of modern telescope optics. Up until now, the only means of coupling a DSLR to the telescope relies on the use of a standard mass produced camera T-Ring. Unfortunately, T-rings have failed to evolve with the demanding needs of the advanced astro-imager: The use of 42mm T-thread for the coupling causes a choke-point in the imaging train (typcially 38mm internal diameter), resulting in vignetting in fast systems. High resolution digital image sensors and their protective glass covers are highly vulnerable to dust that can enter the body each time the camera is coupled/uncoupled, or in open systems, particularly if the camera has been modified for full-spectrum use. These commonly available T-rings are mass-produced for generic camera use, with general manufacturing tolerances and design, which result in a potentially loose bayonet fit that can cause focal plane squareness and long-exposure image shifting from lateral play and angular wobble. Our New Baader Protective Wide T-Ring System for the Canon EOS evolves the T-Ring and solves these issues. The 2" wide-aperture of the protective T-ring accepts 3 different attachment adapters, which are included with each T-ring: Standard T-thread (42mm), 2" thin profile nosepiece, and 48mm thread (astro filter standard). The internal filter compartment is able to accept both Baader 2" mounted filters, and 50.4mm diameter unmounted filters for the widest clear aperture possible (47.3mm aperture). The optimized design and tight manufacturing tolerances ensure the closest fit possible with the Canon EOS body. This avoids the occurance of focal plane tilt and image shift caused by play and wobble at this connection point. The Baader Protective Wide T-Ring System includes 6 configurable parts: Protective T-ring Body Temperature Compensation Ring (for installation of 50.4mm x3mm unmounted filters) Adapter S52/M48 (for 48mm connection thread) T-thread/M48 adapter (for standard 42mm T-thread connection) S52/2" wide aperture 2" nosepeice (includes M48 filter thread) 1.5mm Allen Wrench In addition to the basic system, the Protective Wide T-Ring system is available with 4 different pre-installed Baader 50.4mm x3mm filters: Clear, UV/IR Cut, UHC-S, and 7nm H-alpha. Manual Protective Wide T-Ring Instruction Manual Specifications Base Version (no filter) MANUFACTURER Baader Planetarium SKU (#) 2958550 EAN CODE 4047825024718 WEIGHT (NETTO) 0.13 OPTICAL LENGTH (MM) 12 CLAMPING SYSTEM Dovetail clamp USAGE Protects the camera body against dust and humidity SCREW TYPE 6x M1,3 Allen wrench screws INNER DIAMETER / CLEAR APERTURE (MM) 41 OUTER DIAMETER 64 INNER CONNECTION (LENS SIDED) Thread, Dovetail ring clamp, S52, T-2 (M42 x 0,75), M48 OUTER CONNECTION (LENS SIDED) Barrel, 2" (50,8mm) INNER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, M48 OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Dovetail ring, Bayonet, S52 COMPATIBLE BRANDS Astro T-2, Baader Planetarium TYPE OF ADAPTER Camera Adapter, Filter holder, Reducing piece incl. Clear Filter MANUFACTURER Baader Planetarium SKU (#) 2958550C EAN CODE 4047825026385 WEIGHT (NETTO) 0.195 OPTICAL LENGTH (MM) 12 CLAMPING SYSTEM Dovetail clamp USAGE Protects the camera body against dust and humidity SPECIAL FEATURES with built-in clearglass filter SCREW TYPE 6x M1,3 Allen wrench screws INNER DIAMETER / CLEAR APERTURE (MM) 41 OUTER DIAMETER 64 INNER CONNECTION (LENS SIDED) Thread, Dovetail ring clamp, S52, T-2 (M42 x 0,75), M48 OUTER CONNECTION (LENS SIDED) Barrel, 2" (50,8mm) INNER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, M48 OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Dovetail ring, Bayonet, S52 COMPATIBLE BRANDS Astro T-2, Baader Planetarium TYPE OF ADAPTER Camera Adapter, Filter holder, Reducing piece incl. H-alpha 7nm Filter MANUFACTURER Baader Planetarium SKU (#) 2958550H EAN CODE 4047825102348 WEIGHT (NETTO) 0.194 OPTICAL LENGTH (MM) 12 CLAMPING SYSTEM Dovetail clamp USAGE Protects the camera body against dust and humidity SPECIAL FEATURES with built-in H-alpha filter SCREW TYPE 6x M1,3 Allen wrench screws INNER DIAMETER / CLEAR APERTURE (MM) 41 OUTER DIAMETER 64 INNER CONNECTION (LENS SIDED) Thread, Dovetail ring clamp, S52, T-2 (M42 x 0,75), M48 OUTER CONNECTION (LENS SIDED) Barrel, 2" (50,8mm) INNER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, M48 OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Dovetail ring, Bayonet, S52 COMPATIBLE BRANDS Astro T-2, Baader Planetarium TYPE OF ADAPTER Camera Adapter, Filter holder, Reducing piece incl. UV/IR-Cut Filter MANUFACTURER Baader Planetarium SKU (#) 2958550L EAN CODE 4047825026392 WEIGHT (NETTO) 0.195 OPTICAL LENGTH (MM) 12 CLAMPING SYSTEM Dovetail clamp USAGE Protects the camera body against dust and humidity SPECIAL FEATURES with built-in UV/IR-Cut filter SCREW TYPE 6x M1,3 Allen wrench screws INNER DIAMETER / CLEAR APERTURE (MM) 41 OUTER DIAMETER 64 INNER CONNECTION (LENS SIDED) Thread, Dovetail ring clamp, S52, T-2 (M42 x 0,75), M48 OUTER CONNECTION (LENS SIDED) Barrel, 2" (50,8mm) INNER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, M48 OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Dovetail ring, Bayonet, S52 COMPATIBLE BRANDS Astro T-2, Baader Planetarium TYPE OF ADAPTER Camera Adapter, Filter holder, Reducing piece incl. UHC-S Filter MANUFACTURER Baader Planetarium SKU (#) 2958550N EAN CODE 4047825026408 WEIGHT (NETTO) 0.197 OPTICAL LENGTH (MM) 12 CLAMPING SYSTEM Dovetail clamp USAGE Protects the camera body against dust and humidity SPECIAL FEATURES with built-in UHC-S nebula filter SCREW TYPE 6x M1,3 Allen wrench screws INNER DIAMETER / CLEAR APERTURE (MM) 41 OUTER DIAMETER 64 INNER CONNECTION (LENS SIDED) Thread, Dovetail ring clamp, S52, T-2 (M42 x 0,75), M48 OUTER CONNECTION (LENS SIDED) Barrel, 2" (50,8mm) INNER CONNECTION (EYEPIECE/-CAMERA-SIDED) Thread, M48 OUTER CONNECTION (EYEPIECE/-CAMERA-SIDED) Dovetail ring, Bayonet, S52 COMPATIBLE BRANDS Astro T-2, Baader Planetarium TYPE OF ADAPTER Camera Adapter, Filter holder, Reducing piece Downloads Digiscoping- camera adaptations for afocal photography and eyepiece projection Instructions for Protective T-Ring for Canon EOS