Finetuning Ring 14 mm M 48 x 0.75 for Baader Planetarium Hyperion eyepiece

Hyperion Finetuning Ring 14mm for Baader Hyperion Eyepieces and M48 extension

Extension ring with M48x0.75 thread on both sides and an optical length of 14mm. The ring is made of black anodized aluminium.
Hyperion extension ring assembly Increases the magnification of a Hyperion eyepiece by ca. 23%

Screw the extension ring between the Hyperion's barlow element and the main body and the eyepiece's focal length is reduced by ca. 23%.

You also can use the ring as an extension tube to find the right distance (astrophotography).

Specifications:

-- thread on both sites: M48x0,75 (male/female)
-- lenght: 14mm
-- M48 female thread length: 3 mm

Usable eyepieces and resulting focal lengths:

Hyperion eyepiece:
New focal length with 14mm extension ring:
Hyperion 3.5 2,8mm
Hyperion 5 4mm
Hyperion 8 6.4mm
Hyperion 13 10.5mm
Hyperion 17 13.7mm
Hyperion 21 17mm