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Home -> Products -> Telescopes -> Astronomical Telescopes -> ASTELE™ 203
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      Home -> Products -> Telescopes -> Astronomical Telescopes -> ASTELE™ 203

ASTELE™ 203 (Astronomical Telescope)

ASTELE™ 203 EL

The ASTELE™ 203 is a superb astronomical telescope for the professional or serious amateur astronomer.
Its optical design is Maksutov Cassegrain.
The large 203 mm aperture produces bright, razor sharp images.
Its diffraction limited optics are multi-coated and make it a great instrument for doing astrophotography, delivering pin-point images over a 35mm format.
If you're looking for a telescope with large aperture and superb optics, the ASTELE™ 203 is that and more. The ASTELE™ 203 uses U.S. standard 1.25" O.D.-sized eyepieces (hundreds are available).

The ASTELE™ 200 is available in three models

  • The ASTELE™ 203 OTA (Optical Tube Assembly).
  • The ASTELE™ 203 G (German Equatorial Mount)
  • The ASTELE™ 203 EL (with motorized base, shown)

The ASTELE™ 203 G (German Equatorial Mount) comes with slow-motion controls, setting circles, polar axis finder, accessory tray and fully adjustable aluminum tripod. 

Finish: black
Photo adapter for standard cameras and lens shade are available separately.

SPECIFICATIONS ASTELE™ 203 OTA ASTELE™ 203 G ASTELE™ 203 EL 
Optical Design Maksutov-Cassegrain Maksutov-Cassegrain Maksutov-Cassegrain
Optical Diameter: 203 mm (8") 203 mm (8") 203 mm (8")
Focal Length: 2030 mm (80") 2030 mm (80") 2030 mm (80")
F-Ratio: f/10 f/10 f/10
Angular Field of View: 33'54" 33'54" 33'54"
Resolving Power (arc sec) 0.59 0.59 0.59
Optical Coatings Multi-coated Multi-coated Multi-coated
Limiting Visual Magnitude (approx) 13.5 13.5 13.5
Maximum Practical Visual Power
 • with 25 mm eyepiece
• with 10 mm eyepiece		 400 X
81 X
203 X		 400 X
81 X
203 X		 400 X
81 X
203 X
Viewfinder  8 x 40 mm, 90° 8 x 40 mm, 90° 8 x 40 mm, 90°
Optical Tube Dimensions (diameter x length) 240 mm x 654 mm (9.4" x 25.7") 240 mm x 654 mm (9.4" x 25.7") 240 mm x 654 mm (9.4" x 25.7")
Secondary Mirror Obstruction 36.6 % 36.6 % 36.6 %
Main Mirror
 • material
• surface quality
Astrosital glass
/ 8
Astrosital glass
/ 8
Astrosital glass
/ 8
Meniscus
 • material
• surface quality
Pyrex glass
/ 8
Pyrex glass
/ 8
Pyrex glass
/ 8
Eyepiece Holder: 1.25" (31.7 mm) 1.25" (31.7 mm) 1.25" (31.7 mm)
Focusing Range 10 m (33') – infinity 10 m (33') – infinity 10 m (33') – infinity
Diagonal mirror / prism mirror mirror mirror
Mounting Type – German-type equatorial Fork mount
Tripod optional  Aluminum w / GEM (A9029) –
Total Telescope Net Weight: 13 kg (28.6 lb) N/A N/A
  Suggested Retail Price:
  $2,499.95 $3,099.95 $2,999.95



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For more information please contact us at:
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Tel.: (847) 215-8800, Fax: (847) 215-9073
E-mail: info@lomoamerica.com

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