Baader Planetarium Protective Wide T-Ring System for Canon EOS with Filter Mounting

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Baader Planetarium Protective Wide T-Ring System for Canon EOS with Filter Mounting has a rating of 5.0 stars based on 1 reviews.

Item #AAS066-1

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  • $89.00
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  • Simply the best T-Ring available
  • Internal filter compartment is able to accept Baader 2" mounted filters
  • Can also accept 50.4mm unmounted filters
  • The closest fit possible to the Canon EOS camera body
  • Available with or without optional filters included
Questions? Let our experts help!
  • 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.


    The 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.

    Supplier SKU


    Shipping Restrictions

    Only ships in contiguous USA.

  • Dimensions & Specifications

    Model Type

    Without Included Filter


    Baader Planetarium


    2 Year Manufacturers Warranty


    Download Baader Planetarium Protective Wide T-Ring System Instructions
  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    This product has a 2 year manufacturer's warranty against defects is provided. If you have specific questions about this product's warranty please contact Alpine Astronomical's Customer Service department by email at

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

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