Product Questions
- Description
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Details
TEC APO 140 f/7 Tripelt Apochromat
The TEC APO 140 has a number of features that in a given combination are rarely found in one scope:
- Precision apochromatic objective with modern coating that makes lenses almost invisible
- Oiled and fully sealed lens triplet, for fastest thermal adaptation and minimum of haze and reflections
- Retractable baffle
- Light tube assembly
- FeatherTouch 360° rotatable focuser with coarse and fine focusing
- Collet type eyepice holder
- Line of accessories, including: Precision tube rings with adjustable latches, Dovetail plate (same width and fit as Losmandy plates), Finder bracket with new principle of finder adjustment, Choice of two kind of cases.
- APO140 is an Aplanatic Oiled Triplet refractor with ED glass (FPL-53) as a middle element.
- The color correction is optimized for visual use with focus shift less than 0.02% from 436nm to 1000nm. Calculated Strehl for e-line (546nm) is 0.99.
- Intereferometry of the first run lenses showed that the average Strehl is close to calculated with a very smooth wave front and RMS less than 1/50. air-spaced objectives. The outside surfaces of front and rear lenses are coated with 7 layers of antireflective coating, that reduce light reflection to the average 0.25% in range of 400-700nm.
Specifactions
Clear aperture 5.5" / 140 mm Focal length 980 mm Focal ratio 7.0 Image scale 3.5 arc min/mm Resolution (theoretical) 0.8 arc sec Focuser Feather Touch 3545 Eyepiece holder 2" Collet type Focusing range 4.5" / 114 mm One turn focus travel Coarse 21.5 mm / Fine 2.3 mm Back focus distance 6.7" / 170 mm Focuser load capacity 10 lb Tube assembly diameter 5.9" / 150 mm Baffle dia. 7" / 178 mm TA length (shortest) 34" / 864 mm Balance point position 14" ± 1" (350 mm ± 25 mm) from the focuser flange OTA weight 19 lb / 8.6 kg / (for tube rings - add 2 lb) Lens coatings: Broad band 7 layers antireflection coating (BBAR) Includes : Optical tube assembly, front cover, plug. Pictures taken with TEC APO 140 ED
More pictures are available here: Homepage
Recommended 0.72x Telecompressor Corrector # 140 5371 of Astro Physics
This Reducer/Corrector reduces the focal length of the 140 ED from 980 mm to 700 mm and gives you a focal ratio of f/5. For a full frame camera (24 x 36 mm), this results in a field of view of 3 x 2 degree at an image circle of 50 mm, diffraction limited and free of vignetting.
Additional Information
General | |
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Manufacturer | TEC |
SKU (#) | 1351000 |
Manufacturer SKU (#) | 140 700 |
EAN Code | 4047825018960 |
Optics | |
Optical Design | Apochromatic Refractor |
Clear Aperture | 5.5" (140mm) |
Focal Length | 980 mm |
Focal Ratio | f/7 |
Back Focus Distance | 6.7" (170mm) |
Tube diameter (max) | 5.9" (150 mm) |
Image Scale | 3.5 arcmin / mm |
Optical length (mm) | 34" (864 mm) |
Optical Tube Weight | 19lb (8,6 kg) |
Mount | |
Included Items | |
Focuser | Feather Touch 3545 |


