The TSA-120 is the second triplet apochromat in the TSA Series. Its superb color correction will provide high contrast images with pin point stars across the field.

The compact size of 28" allows the TSA-120 to be easily transported to remote sites.

The TSA-120 is a great scope for imaging. The TOA 35 flattener converts the 120 into an f/7.3 882mm flat field 2.6º instrument and the reducer changes it to an f/5.6 672mm.  

OTA only.  Includes finderscope quick release bracket, 2" to 1.25" adapter.

TSA-120 SPECIFICATIONS

Mechanical Specifications

Diameter of main tube: 125mmø
Weight of OTA : 12.6 lbs
Back focus: 227.5mm

Optical Specifications

Aperture: 120mmø
Focal length: 900mm
Focal ratio: f/7.5
Optical design: Triplet ED apo
Coating: Broad band multi-layer anti-reflection coatings

TOA-35 Flattener

Focal length: 882mm
Focal ratio: f/7.3
Optical performance 7 micron RMS-spot to 20mm off-axis
Image circle: 40mmø
Image field: 2.6ºø diameter

TOA-35 Reducer

Focal length: 672mm
Focal ratio: f/5.6
Optical performance: 4 microns RMS-spot on axis; 6 microns 10mm off-axis; 13 microns 20mm off-axis; 40mmø/3.4º field

Price includes:  Tube assembly, MEF fine focuser, finder quick release bracket, 2" compression ring ocular adapter, 1.25” compression ring adapter w/coupling, 2 ea. 72mmø extension tubes, metal focuser rear cover and 2” sleeve.