Focus Scientific

Baader Hyperion 28mm Finetune Ring

Baader Planetarium's 28mm Finetune ring increases the magnification of Hyperion eyepieces. Simply screw this finetune ring in between the eyepiece body and negative lens assembly for an instant power boost.

Combine a 14mm and 28mm finetune ring for even more magnification.

Finetune Rings and Focal Lengths

Hyperion w/ 14mm Ring 28mm Ring 14 + 28 Ring

w/ Baader

2" Filter

21mm 17.6 15.5 14.0 18.5
17mm 13.1 10.8 9.2 14.6
13mm 10.8 9.2 8.1 11.7
10mm 8.4 7.1 6.1 9.1
8mm 6.0 5.0 4.3 6.9
5mm 4.0 3.2 2.6 4.3
3.5mm 2.5 2.1 1.8 2.9

Specifications

  • Threads: M48 x 0.75
  • Length: 28mm (1.1")
  • Weight: negligible
  • Engineered in Germany, made in China