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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Explore Scientific T2 Ring - Canon DSLR 1.5MM Light-Path - Discontinued
Explore Scientific T2 Ring - Canon DSLR 1.5MM Light-Path - Discontinued
Explore Scientific T2 Ring - Canon DSLR 1.5MM Light-Path - Discontinued

Explore Scientific T2 Ring - Canon DSLR 1.5MM Light-Path - Discontinued

by Explore Scientific
SKU ES-510369
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$50.00 - $50.00
$50.00
$50.00 - $50.00
$50.00
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  • Reduces optical path to an ultra-thin 1.5mm
  • Essential for setups with critical backfocus requirements
  • Designed for all Canon DSLR cameras with EF/EF-S mount
  • Standard M42x0.75 female T-thread for telescope connection
  • Durable stainless steel construction prevents flexure
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Explore Scientific T2 Ring - Canon DSLR 1.5MM Light-Path

    The Explore Scientific T2 Ring for Canon DSLR solves critical backfocus problems by reducing the light path to just 1.5mm, a significant decrease from the typical 11mm to 12mm of standard T-rings. This stainless steel adapter features a standard M42x0.75 thread, ensuring you can connect your Canon DSLR to correctors and flatteners where every millimeter is essential for achieving a sharp, focused image across the entire frame.

    Solving Critical Backfocus: The 1.5mm Light Path Advantage

    Many modern optical systems, particularly those using field flatteners or focal reducers, require a precise 55mm distance from the corrector to the camera sensor. A standard Canon DSLR has a flange-to-sensor distance of 44mm, and a typical T-ring adds another 11mm, consuming the entire 55mm budget. This leaves no room for filter wheels or off-axis guiders. The Explore Scientific 1.5mm T2 Ring reclaims nearly 10mm of precious backfocus, making it possible to integrate these critical accessories into your imaging train and still achieve perfect focus.

    Built for Canon Systems: M42x0.75 Threads and Stainless Steel Construction

    This adapter is machined from stainless steel, not aluminum, providing a more rigid and durable connection that resists flexure, especially with heavier cameras or long exposure times. It attaches directly to any Canon DSLR body (EF/EF-S mount) and presents a standard female M42x0.75 T-thread for connection to your telescope's focuser, flattener, or other T-threaded accessories. This ensures a secure, non-rotating fit that maintains precise optical alignment throughout your imaging session.

  • What is the main advantage of the Explore Scientific 1.5mm T2 Ring for Canon?

    Its primary advantage is its extremely short 1.5mm optical path. This is crucial for astrophotography setups with tight backfocus requirements, such as those using focal reducers or field flatteners, allowing you to insert other accessories like filter wheels into the optical train while still reaching focus.

    When do I need this 1.5mm T2 Ring instead of a standard T-ring?

    You need this specific T-ring when your imaging train's total backfocus exceeds the tolerance of your corrector. For example, if your flattener requires exactly 55mm and your camera, filter wheel, and off-axis guider add up to more than that with a standard 11mm T-ring, this 1.5mm version will help bring your total backfocus into the correct range.

    Is this T2 ring compatible with Canon mirrorless cameras like the EOS R series?

    No, this T2 ring is designed specifically for Canon DSLR cameras that use the EF or EF-S mount. It is not compatible with Canon's mirrorless RF or EF-M mounts.

    What does the M42x0.75 thread on the Explore Scientific T2 Ring connect to?

    The M42x0.75 thread is the universal "T-thread" standard in astronomy. It connects to the telescope side of your imaging train, such as a field flattener, coma corrector, off-axis guider, or a 2" T-adapter that fits into your telescope's focuser.

    How does the 1.5mm light path of this T2 Ring help when imaging the Andromeda Galaxy (M31) with a fast refractor?

    When imaging a large target like the Andromeda Galaxy (M31) with a fast refractor, a field flattener is essential for sharp stars to the edge. These flatteners have strict backfocus needs (typically 55mm). The 1.5mm path of this ring gives you the space needed to add a light pollution filter in a filter drawer, which is critical for bringing out faint detail in M31 from suburban skies, without violating the flattener's required spacing.

    Is the stainless steel construction of this T2 ring better than aluminum?

    Yes. Stainless steel offers superior rigidity compared to aluminum. This minimizes the risk of flexure or tilt, especially when using a heavy DSLR camera, which can cause elongated stars in the corners of your images. The steel threads are also more resistant to wear and stripping over time.

  • Product Type T2 Ring Adapter
    Camera Mount Canon DSLR (EF/EF-S Mount)
    Telescope Connection M42x0.75 Female Thread
    Optical Path / Backfocus Consumption 1.5mm
    Material Stainless Steel
    GTIN 4007922039527

    • Explore Scientific T2 Ring for Canon DSLR (1.5mm Light Path)

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