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  • TI 35 Astrograph
    the best for travelling imagers

TI35 – The top notch compact   Astrograph

The TI 35  (350 mm of clear aperture) is based on the same Modified Harmer Wynne optical configuration. We are proud to have realized a very compact, light-weight, high-end performance astrograph in super fast f/3.5 (1230 mm of focal length) and in all-around f/5.0 (1750 mm of focal length).

The TI 35 with its 740 mm long, 430 mm over-all diameter and less than 25 kg weight, is the most performing transportable astrograph in the market.

Like our TI 45, it uses a further refractive element correction (in ED glass) – in order to reach a real diffraction limited corrected field of over 60 mm in diameter without introduce color aberrations (from 400 nm to 1,2 micron of wavelength). These performances of very fast and very corrected optics allows to this optics to be used with success both in narrow band filter imaging and in Near Infrared imaging.

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 31TH 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

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THE MOST IMPORTANT FEATURES:

  • Effective optical aperture: 350 mm
  • Focal length 1230 mm – f/3.5 or  1750 mm – f/5.0
  • Awesome optical performances for both 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 secondary mirror electronic Focuser (ASCOM Alpaca compatible)
  • Built in electronic control boards
  • WI-FI Telescope Control Software
  • Extreme modern Italian design
  • Automated dust cover (option)  (ASCOM Alpaca compatible) (PRICE)
  • TI110 Field Rotator (option)  (ASCOM Alpaca compatible) (PRICE)

TI 35   f/3.5

Aperture: 350 mm

Focal length:  1230 mm – f/3.5

The most transportable in its class

Optical Performances

TI 35   f/5.0

Aperture: 350 mm

Focal length:  1750 mm – f/5.0

The most transportable in its class

Optical Performances
TI35 Astrograph Technical DataTI35 3,5TI35 5,0
Overall Dimension (mm)778x445x445880x445x445
Weight (kg)1920
Focal Length (mm)12301750
Optical ConfigurationModified Harmer-Wynne
Parabolic Primary mirror
Diameter (mm) 360
Effective Optical Aperture (mm) 350
f/3,515,00
MaterialBorosilicate glass
CoatingAlum. Enanced >94%
Secondary Mirror
Diameter (mm)190174
Material (mm)Borosilicate glass
CoatingAlum. Enanced >94%Alum. Enanced >94%
Corrector
Type3-Lenses ED3-Lenses ED
Corrector Lens Diameter (mm)116116
CoatingMulty layers 400-900 nm
Real Diffraction Limited field diameter (mm) (considering Polychromatic 400/700 nm)6287
Effective Obstruction (of the secondary baffle) (%)56.052.0
Light incoming (% of aperture area)68.472.6
Back Focus from rear flange (mm)125130
Loss of light (vignetting) @ 26 mm from axis (%)6.02.3
Loss of light (vignetting) @ 30 mm from axis (%)9.07.0
Spot Diagram RMS Diameter @ 26 mm from axis - Poly 400-700 nm (micron)2.293.27
Spot Diagram RMS Diameter @ 30 mm from axis - Poly 400-700 nm (micron)3.903.53

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