Found this posted this morning at the Takahashi Yahoo group. It's from Art Ciampi. Search didn't turn up anything about it here, so thought I'd start a thread. Might be just the thing for a visual observer or an imager who wants near 5" performance without dealing with a really big scope like the TOA130.
Announcing the TSA-120/120mm Takahashi Super Apochromat.
TSA-120 SPECIFICATIONS
* Second TSA triplet apochromat
* Very high order of color correction
* Compact design only 28" long collapsed
* Long back focus 227mm [8.93"] to accommodate bino viewers and any 2" diagonal
* Supplied with 2" and 1/1/4" accessories and extension tubes
* Quick release finder bracket included
* Knife edge baffles are standard for highest contrast
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
Mechanical Specs
Diameter of main tube: 125mmø
Diameter of dew shield [sliding]: 713mm? [28"]
Weight of OTA : 7 kgs/15.4 lbs
Back focus: 227.5mm [8.93"]
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: $3795 MAP
Announcing the TSA-120/120mm Takahashi Super Apochromat.
TSA-120 SPECIFICATIONS
* Second TSA triplet apochromat
* Very high order of color correction
* Compact design only 28" long collapsed
* Long back focus 227mm [8.93"] to accommodate bino viewers and any 2" diagonal
* Supplied with 2" and 1/1/4" accessories and extension tubes
* Quick release finder bracket included
* Knife edge baffles are standard for highest contrast
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
Mechanical Specs
Diameter of main tube: 125mmø
Diameter of dew shield [sliding]: 713mm? [28"]
Weight of OTA : 7 kgs/15.4 lbs
Back focus: 227.5mm [8.93"]
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: $3795 MAP
