TI 55: THE BEST ASTROGRAPH FOR YOUR OBSERVATORY
The TI 55 Astrograph range include four models to match every needs of modern research.
- TI 55 f/2,6 – 1445 mm of focal length for extremely fast optics. It is based on a direct PRIME focus parabolic primary mirror with a 6.5″ Wynne corrector with 82 mm of back-focus. It offers highest productivity per night, great advantage for super-nova search, surveys, asteroids, and other fields of modern astronomy.
- TI 55 f/3,5 – 1925 mm of focal length for very wide corrected field and very fast optics. A killer for astroimaging setup.
- TI 55 f/4,9 – 2700 mm of focal length suitable for general use while maintaining an excellent focal ratio that allows reduced exposure times with respect traditional RC and CDK system.
- TI 55 f/6,5 – 3575 mm of focal length for deeper sky objects when excellent seeing condition allows the maximum resolution
The TI 55 f/3,5 and f/4,9 are based on a Modified Harmer-Wynne optical configuration.
The TI 55 f/6,5 is based on a Corrected Cassegrain optical configuration
Each TI55 model use a special designed and FEM optimized lightweighted mirrors. Both primary and secondary. Their mirror are made using Schott Borofloat that perform better mechanical and thermal characteristics than Schott classical borosilicate glasses.
Our FEM optimized lightweighted mirrors allows for TI55 models a glass weight saving of about 20 kg. It brings high advantage both in terms of thermalization time and in terms of holding structure masses. All this lets less deformation on structures and on mirrors itself and less weight and moment of inertia on your mount.
|TI 55 ASTROGRAPH TECHNICAL DATA||TI 55 WPF 2.6||TI55 3.5||TI55 4.9||TI55 6.5|
|Overall Dimensions (mm)||1530 x 750 x 750||1100 x 750 x 750||1280 x 750 x 750||1300 x 750 x 750|
|Focal length (mm)||1445||1925||2700||3575|
|Optical Configuration||164 mm Wynne Corrector Prime Focus||Modified Harmer-Wynne||Modified Harmer-Wynne||Corrected Cassegrain|
|Parabolic Primary Mirror|
|Effective optical aperture (mm)||550|
|Material||High-End Lightweight Schott Borofloat|
|Coating||Alum. Enanced >94%|
|Material||-||High-End Lightweight Schott Borofloat|
|Coating||-||Alum. Enanced >94%|
|Type||3-Lenses ED||3-Lenses ED||3-Lenses ED||2-Lenses|
|Corrector lens diameter (mm)||164||140||146||110|
|Coating||Multy layers 400-900 nm|
|Real Diffraction Limited field diameter (mm) (considering Polychromatic 400/700 nm)||59||70||>100||68|
|Effective Obstruction (of the secondary baffle) (%)||37,3%||55,3%||50,9%||42,2%|
|Light incoming (% of aperture area)||86,0%||69,0%||73,8%||82,0%|
|Back Focus from rear flange (mm)||82||155||175||190|
|Loss of light (vignetting) @ 26 mm from axis (%)||5,0%||3,6%||1,2%||2,1%|
|Loss of light (vignetting) @ 30 mm from axis (%)||10,0%||6,0%||4,0%||3,3%|
|Spot Diagram RMS Diameter @ 26 mm from axis - Poly 400-700 nm (micron)||3,66||2,27||2,17||3,81|
|Spot Diagram RMS Diameter @ 30 mm from axis - Poly 400-700 nm (micron)||3,94||2,90||2,34||5,42|