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  • TI 45 Astrograph
    the most innovative astrograph

TI45: A new generation  Harmer Wynne Astrograph

The TI 45  is a new generation astrograph born after  in-depth and extensive studies lasted five years.

It has 450 mm of optical aperture and it combines a number of innovative features and special solutions.

The TI 45 Astrograph range include four models:

  • TI 45  – f/4.0  Focal length: 1800 mm
  • TI 45  – f/8.0  Focal length: 3600 mm
  • TI 45 Dual Focal Length (DFL) f/4.0 – f/8.0
  • TI 45  – f/5.2  Focal length: 2350 mm

The fast f/4 and the f/5.2 models are based on a Modified Harmer-Wynne optical configuration with three elements corrector.

The “all-around” f/8 configuration, is based Corrected Cassegrain with two elements corrector.

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Fused Silica (Quartz) primary mirror  is available as option (see Price List). Fused Silica (Quartz) performs an awesome thermal expansion coefficient of 5.4 x 10-7/℃ , 6 time less than borosilicate glasses.

Lightweight Quartz primary mirror is available as option (see Price List). Near-to-zero CTE material + lightweight shape = best solution.


The design was carried out by a professional team driven by an aerospace engineer.

Mechanical design was performed in a 3D environment and FEM analysis have driven the sizing of the components.

In the TI45 DFL model the rear flange include an integrated electronical focuser and 110 mm field rotator designed and manufactured with the best performances ever seen. The other TI45 models still have the TI110 Field Rotator inside the rear flange and perform an extremely precise secondary mirror focusing system.

From optical, mechanical, electronic and design point of view, the TI45 Astrograph is the most advanced telescope which you can find on the world market.

The TI 45 DFL Astrograph: Not a simple telescope, but it is really two telescopes in one.

In the DFL model, the TWO configurations (the fast f/4 and the “all-around” f/8) are “native” and both optimized. No “Barlow” lenses are used, neither “focal reducer” to modify focal length. The two configuration share only the primary mirror and the structure.  You can shift from one to the other in less than five minutes without loss of collimation thanks to the special secondaries holder and thanks to the spherical secondary mirror of the f/4 setup. You can leave in place all your instruments (CCD camera, filter wheel, focuser, AO, OAG, ecc), after a configuration change, you only have to refocus a little!

TI45 – DFL

Aperture: 450 mm

Dual focal Length  f/4 – f/8

The versatile Astrograph

Optical Performances

TI45 – 4.0

Aperture: 450 mm

Focal Length  1800 mm – f/4

The fast Astrograph

Optical Performances

TI45 – 5.2

Aperture: 450 mm

Focal Length  2350 mm – f/5.2

All-around Astrograph

Optical Performances

TI45 – 8.0

Aperture: 450 mm

Focal Length  3600 mm – f/8.0

The deep-sky Astrograph

Optical Performances

THE TI45 MOST IMPORTANT FEATURES:

  • Effective optical aperture: 450 mm
  • For the DFL model: Native dual focal length (1800 mm f/4, 3600 mm f/8) interchangeable within five minutes
  • Awesome optical performances for each configurations
  • Extreme stiffnes and thermal stability (thanks to extensive use of carbon fiber)
  • Extreme lightness  (thanks to extensive use of carbon fiber)
  • Easy collimation
  • Compact dimensions
  • Built in 4″ electronic field rotator (ASCOM Alpaca compatible)
  • Automated dust cover (ASCOM Alpaca compatible)
  • Integrated electronic focuser  (ASCOM Alpaca compatible)
  • Built in electronic control boards
  • WI-FI Telescope Control Software
  • Extreme modern Italian design
TI 45 Astrograph -
Technical dataf/4f/8f/5,2
Overall dimensions (mm)560x560x1020560x560x1120560x560x1140
Weight (kg) - Standard mirrors43 42 (45 DFL model)42
Focal length (mm)180036002350
Optical ConfigurationModified Harmer-WynneCorrected CassegrainModified Harmer-Wynne
Parabolic Primary Mirror
Diameter (mm)462
Thickness (mm)50
Effective optical aperture (mm)450
MaterialBorosilicate glass
CoatingAlum. Enanced >94%
Secondary Mirror
Diameter (mm)238166220
Thickness (mm)242022
ShapeSphericHyperbolicSpheric
MaterialBorosilicate glass
CoatingAlum. Enanced >94%
Corrector
Type3-Lenses ED2-Lenses3-Lenses ED
Corrector lens diameter (mm)12694136
CoatingMulty layers 400-900 nm
Real Diffraction Limited field diameter (mm) (considering Polychromatic 400/700 nm)837290
Effective Obstruction (of the secondary baffle) (%)54,6%38,7%50,7%
Light incoming (% of aperture area)70,0%83,8%74,1%
Back Focus from rear flange (mm)188188200
Loss of light (vignetting) @ 26 mm from axis (%)5,0%5,0%3,5%
Loss of light (vignetting) @ 30 mm from axis (%)11,0%7,0%7,5%
Spot Diagram RMS Diameter @ 26 mm from axis - Poly 400-700 nm (micron)2,24,522,22
Spot Diagram RMS Diameter @ 30 mm from axis - Poly 400-700 nm (micron)2,586,642,57
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  • Terms & Conditions

Telescopi Italiani

NOTHING WILL BE SEEN AS BEFORE

Email: info@italiantelescopes.net

Telescopi Italiani s.r.l.

Registred Office:

Via Boezio 16 – 00165 Roma – Italy

 

Operational Headquarter:

Via Trento e Trieste 39 – 56042 Crespina (PI) – Italy Phone: +39 342 8012938

 

Japan Correspondence Office:

304 Sanwa Plaza 1-14 27, Ninomiya-cho Chuo-ku, Kobe, Hyogo, JAPAN. Phone: +81 80-3786-3618

____________________

P.IVA 12695391008  SDI: SUBM70N

 

Product Series

  • TI 35 ASTROGRAPH
  • TI 45 ASTROGRAPH
  • TI 55 ASTROGRAPH
  • TI 65 ASTROGRAPH
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