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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/3.5  Focal length: 1575 mm – NEW MODEL
  • TI 45  – f/8.0  Focal length: 3600 mm – ONLY ON REQUEST
  • TI 45  – f/5.2  Focal length: 2350 mm

The fast f/3.5 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 –  AVAILABLE ONLY ON REQUEST

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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.

  • Fused Silica (Quartz) primary mirror FOR FREE ! 

FOR ORDER WITHIN 31 TH DECEMBER 2024 AT THE SAME CURRENT PRICE OF BOROSILICATE GLASS

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 TI45 DFL is NO LONGER AVAILABLE

The other TI45 models still can have the TI110 Field Rotator inside the rear flange (as Optional) 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 3.5 Astrograph: NEW MODEL

We wanted to include a TI45 model with the focal length still reduced to f/3.5 to be in line with the other models. This model with such optical performance will be the new benchmark for today’s increasingly demanding market in terms of shooting speed and corrected field.

First field correction test of our TI45 f/4 – LINK

TI45 – 3.5 – NEW MODEL

Aperture: 450 mm

Focal Length  1575 mm – f/3.5

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 – ONLY ON REQUEST

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
  • 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 electronic control boards
  • WI-FI Telescope Control Software
  • Optional in 4″ electronic field rotator (ASCOM Alpaca compatible) (PRICE)
  • Optional dust cover system (ASCOM Alpaca compatible) (PRICE)
  • Integrated electronic focuser  (ASCOM Alpaca compatible)
  • Extreme modern Italian design
TI 45 Astrograph -
Technical dataf/3,5f/8f/5,2
Overall dimensions (mm)560x560x995560x560x1120560x560x1140
Weight (kg) - Standard mirrors464546
Focal length (mm)157536002350
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)240166220
Thickness (mm)252022
ShapeSphericHyperbolicSpheric
MaterialBorosilicate glass
CoatingAlum. Enanced >94%
Corrector
Type3-Lenses ED2-Lenses3-Lenses ED
Corrector lens diameter (mm)13094136
CoatingMulty layers 400-900 nm
Real Diffraction Limited field diameter (mm) (considering Polychromatic 400/700 nm)727290
Effective Obstruction (of the secondary baffle) (%)54,8%38,7%50,7%
Light incoming (% of aperture area)69,5%83,8%74,1%
Back Focus from rear flange (mm)182188200
Loss of light (vignetting) @ 26 mm from axis (%)5,0%5,0%3,5%
Loss of light (vignetting) @ 30 mm from axis (%)7,0%7,0%7,5%
Spot Diagram RMS Diameter @ 26 mm from axis - Poly 400-700 nm (micron)3,344,522,22
Spot Diagram RMS Diameter @ 30 mm from axis - Poly 400-700 nm (micron)2,426,642,57

NOTHING WILL BE SEEN AS BEFORE

Registred Office:
Via Boezio 16 - 00165 Roma - Italy
Operational Headquarter:
Via Trento e Trieste 39 - 56042 Crespina (PI) - Italy Phone: +39 342 8012938
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USA Correspondence Office:
110 Portwatch Way #104, Wilmington NC 28412 – USA
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Japan Correspondence Office:
304 Sanwa Plaza 1-14 27, Ninomiya-cho Chuo-ku, Kobe, Hyogo, JAPAN. Phone: +81 80-3786-3618

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P.IVA IT12695391008 SDI: KRRH6B9
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