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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.
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.
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf
Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf

Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf

by Baader Planetarium
SKU BAA-2458106
$40.00 - $40.00
$40.00
$40.00 - $40.00
$40.00
Price Match Policy!
  • Connects T-2 accessories to a 1.25" focuser or visual back
  • Modern 3mm T-2 thread depth for cameras with short optical height
  • Safety-Kerf groove prevents slippage and secures equipment
  • Precision-machined for a solid, centered connection
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Baader Planetarium 1.25" Nosepiece to T-2a – with Safety-Kerf

    This Baader Planetarium 1.25" Nosepiece to T-2a adapter solves a critical compatibility issue for modern astro-cameras by incorporating a shallow 3mm male T-2 thread. This updated design replaces the older 5mm standard, preventing the internal components of cameras with minimal back focus from contacting the adapter's threads. The addition of a "Safety-Kerf" groove provides a secure, worry-free connection to any 1.25" focuser or accessory holder.

    The 3mm T-2 Thread: A Modern Solution for Short Back Focus

    Many modern planetary and guide cameras feature extremely short optical heights to maximize back-focus flexibility. The traditional 5mm thread depth of older T-2 adapters can protrude too far into the camera body, potentially bottoming out against filter wheels, sensor windows, or electronics. Baader's 3mm T-2 thread standard eliminates this risk entirely, ensuring your camera can be threaded on fully and securely without any internal contact or damage.

    Safety-Kerf Groove: A Secure Fit for 1.25" Focusers

    The barrel of the 1.25" nosepiece features a machined undercut, which Baader calls a Safety-Kerf. This groove provides a positive stop for your focuser's set screw. Even if the screw loosens slightly, the tip will catch in the kerf, preventing the nosepiece—and your expensive camera—from accidentally slipping out of the focuser and falling.

  • What is the purpose of the 3mm T-2 thread on this Baader nosepiece?

    The 3mm T-2 thread is specifically designed for modern astronomy cameras that have a very short optical height or back focus. Older adapters with 5mm deep threads can bottom out against internal camera components, but the shorter 3mm thread on this Baader nosepiece ensures a secure connection without interference.

    How does the Safety-Kerf on the 1.25" Nosepiece to T-2a work?

    The Safety-Kerf is a machined groove around the 1.25" barrel. When you insert the nosepiece into a focuser, the tip of the locking set screw engages with this groove. This acts as a physical stop, preventing your camera and the nosepiece from slipping out even if the set screw becomes slightly loose during an imaging session.

    Will this Baader T-2 nosepiece work with my ZWO ASI camera that has short back focus?

    Yes, this adapter is an ideal choice for cameras like those from ZWO, QHY, and other manufacturers that feature short back focus distances. The 3mm thread depth is specifically intended to solve the compatibility problems these cameras can have with older, deeper-threaded T-2 accessories.

    How does this Baader 1.25" nosepiece improve security in my Celestron 8" SCT's visual back?

    When used in the 1.25" visual back of a Celestron 8" SCT or similar telescope, the Safety-Kerf provides a significant security upgrade. The focuser's set screw will lock into the groove, creating a much more robust connection than a simple friction fit on a smooth barrel. This reduces the risk of your imaging train slipping as the telescope slews across the sky.

    Why would I choose this Baader nosepiece over a standard one without a safety kerf?

    You should choose this Baader nosepiece for peace of mind. While a standard nosepiece relies purely on the friction from a set screw, the Safety-Kerf provides a mechanical fail-safe. It's a small but critical feature that protects your valuable camera or accessories from an accidental drop.

    Is the Baader 1.25" Nosepiece to T-2a compatible with older T-2 accessories?

    Yes, it is fully compatible. The T-2 thread (M42x0.75) is a universal standard. This adapter will thread into any T-2 female port, whether it's on a new camera, an older filter wheel, or an off-axis guider. The only difference is the shorter, safer thread engagement depth.

  • Adapter Type 1.25" Nosepiece to T-2 Male Thread
    Telescope Side 1.25" Barrel with Safety-Kerf
    Camera Side T-2 (M42x0.75) Male Thread
    Thread Length 3 mm

    • 1.25" Nosepiece to T-2a – with Safety-Kerf

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  • Baader Planetarium 2-Year Warranty