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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 Hyperion Finetuning-Ring - 28mm M48/M48
Baader Hyperion Finetuning-Ring - 28mm M48/M48
Baader Hyperion Finetuning-Ring - 28mm M48/M48

Baader Hyperion Finetuning-Ring - 28mm M48/M48

by Baader Planetarium
SKU BAA-2958228
$30.00 - $30.00
$30.00
$30.00 - $30.00
$30.00
Price Match Policy!
  • 28mm Optical Extension
  • M48 Male and Female Threads
  • Modifies Eyepiece Focal Length
  • Compatible with Baader Hyperion Eyepieces
  • Maintains Optical Alignment
4 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Baader Hyperion Finetuning-Ring - 28mm M48/M48

    The Baader Hyperion Finetuning-Ring - 28mm M48/M48 is a precision-machined optical extension tube designed to shorten the focal length of Baader Hyperion eyepieces. By adding 28mm of spacing between the eyepiece's main body and its modular 1.25"/2" barrel assembly, this M48-threaded ring creates a new, higher-magnification focal length without compromising the original optical design's quality.

    The Hyperion Finetuning-Ring: A Modular Approach to Magnification

    This ring installs between the front negative lens group and the main body of a compatible Hyperion eyepiece. This increased optical path shortens the effective focal length, boosting magnification for more detailed views of planets, the Moon, and tight double stars. The M48 threads on both ends ensure a secure, tilt-free connection, maintaining the optical alignment of the eyepiece.

    • Increased Magnification: Transforms a lower-power Hyperion into a higher-power one, expanding the utility of a single eyepiece to cover multiple magnification steps.
    • Maintained Eye Relief: Because the core optical group is unchanged, the eyepiece retains much of its original comfortable eye relief, a significant advantage over using a traditional Barlow lens.
    • Cost-Effective System: Allows you to create new focal lengths from your existing Hyperion eyepieces, effectively expanding your collection for a fraction of the cost of a new eyepiece.

    This 28mm Ring vs. Shorter Rings: Choosing Your Magnification Jump

    Baader offers Finetuning Rings in different lengths to provide varying degrees of focal length reduction. This 28mm ring is one of the longer options, providing a more significant change in focal length and a larger jump in magnification compared to the shorter 14mm ring in the series.

    • 28mm Finetuning Ring: Best for making a substantial change to an eyepiece's focal length. It is ideal for turning a mid-power eyepiece into a dedicated high-power planetary eyepiece.
    • 14mm Finetuning Ring: Offers a more subtle adjustment, perfect for creating "in-between" magnifications that fill a specific gap in your eyepiece set for double star or planetary imaging.

  • How do I install the 28mm Baader Hyperion Finetuning-Ring?

    Installation is straightforward. First, unscrew the chrome 1.25" or 2" barrel assembly from the main black body of your Hyperion eyepiece. Thread the 28mm Finetuning-Ring onto the M48 threads of the main body, then thread the barrel assembly onto the other side of the ring. The connection should be firm but not overtightened.

    Will the 28mm Hyperion Finetuning-Ring work with non-Baader eyepieces?

    No. This ring is designed specifically for the modular construction and M48 thread system of the Baader Hyperion series eyepieces (excluding the Hyperion Zoom). It will not fit or function correctly with eyepieces from other manufacturers.

    Does using the 28mm Hyperion Finetuning-Ring degrade the image quality?

    No, it is designed as an integral part of the Hyperion optical system. The manufacturer states it transforms the focal length with no loss of quality. Unlike a generic extension tube, its length is calculated to work with the Hyperion's negative lens group to produce a sharp, well-corrected image.

    Which Hyperion eyepieces are compatible with the 28mm Finetuning-Ring?

    The ring is compatible with the fixed focal length Baader Hyperion eyepieces that feature a removable barrel section. This includes the following models: 5mm, 8mm, 10mm, 13mm, 17mm, 21mm, and 24mm. It is not compatible with the Baader Hyperion Zoom eyepiece.

    How would the 28mm Baader Hyperion Finetuning-Ring help when observing Jupiter with a Hyperion 17mm in my 8" SCT?

    In a typical 8" f/10 SCT (2032mm focal length), a 17mm eyepiece gives 120x magnification. Adding the 28mm ring would significantly increase this magnification, pushing it closer to 180-200x. This higher power would make it much easier to resolve fine details like the Great Red Spot, individual cloud bands, and transits of Jupiter's moons, assuming atmospheric seeing is steady.

    If I use the 28mm Baader Hyperion Finetuning-Ring on my 24mm Hyperion for viewing the Orion Nebula (M42), what changes?

    Using the ring will increase your magnification and narrow your field of view. While a standard 24mm Hyperion provides a wide, expansive view perfect for framing the entire Orion Nebula, adding the 28mm ring would create a higher-power configuration. This would be useful for focusing in on the Trapezium star cluster at the heart of the nebula but would prevent you from seeing the full extent of the nebulosity in a single view.

  • Product Type Finetuning Ring / Eyepiece Extension Tube
    Extension Length 28mm
    Threads M48 x 0.75 (Male and Female)
    Compatibility Baader Planetarium Hyperion Eyepieces
    Net weight (kg) 0.03
    Inner Diameter / Clear Aperture (mm) 45
    Outer Diameter 2" (50.8mm)
    Outer Connection (eyepiece/-camera-sided) ø 2" (50.8mm)
    Outer Connection (lens sided) ø 2" (50.8mm)
    Adaptable to Not suitable for Morpheus® 76° eyepieces

    • Baader Hyperion 28mm Finetuning-Ring

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