GSO Ritchey-Chrétien 203/1624 OTA

incl. 27% VAT

1 090.91 €

Including 27% VAT:

1 090.91 € (420 000 HUF)

Net price (for non-EU customers):

858.98 € (330 709 HUF)

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Limited stock (1 piece). Please contact our colleagues before ordering: +36-1-202-5651

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2 year manufacturer warranty
3 years consumer warranty

Product code: GSRC8M

GSO Ritchey-Chrétien 203/1624 OTA

Ritchey-Chrétien (RC) telescopes are known for their excellent optical performance, especially for photographical applications. At the same time however RCs were always notorious for being very expensive. To change this the well-known US-based distributor "Astro-Tech" asked GSO to produce true RC telescopes. GSO is best known for their excellent Newtonian optics which they have built for many years now.

The result of this joint venture is an instrument that is superior in most aspects to a conventional Schmidt-Cassegrain, and still comes at a very affordable price. Teleskop-Service is European distributor for these instruments from GSO.

The 8" f/8Astrograph was designed for full illumination of the "35mm format" (24 x 36mm). For cameras with a small sensor, particularly most CCD cameras, no field flattener is needed. For cameras with a larger sensor we recommend the use of a field flattening lens. (Currently under development.)

Since the optical layout of the RC uses no lenses or corrector plates there is no false colour at all. Also you will not need to use an IR cut filter, thus increasing the effective light-gathering power of the instrument.

Optical Design:	True RC (Ritchey-Chretien) with a hyperbolic primary and a hyperbolic secondary mirror. No glass corrector plates or lenses in the optical train.
Optical Characteristics:	Aperture 8" (203mm), Focal Length 1624, Focal Ratio f/8
Primary Mirror:	Quartz - surface quality 1/12 Lambda or better. The primary mirror has a 99% dielectric high-reflectivity coating.
Secondary Mirror:	Quartz. The mirror has a 99% dielectric high-reflectivity coating. Robust collimatable cell. Obstruction is 42,5%.
Tube:	CF tube with metal primary and secondary mirror cell - complete weight 6,1kg
Computer-optimized baffle system:	The inside of the tube is lined with computer-optimized baffles for optimum suppression of stray light.
Focuser:	1:10 Crayford focuser for extremely smooth focusing. The dual speed 1:10 focusing knob is particularly important for astro imaging. No image shift and up to 5kgs load capacity! The focuser accepts 2" and 1.25" accessories.
Dovetail mounting rail:	A GP-style dovetail rail is mounted on the underside of the tube. It fits in all mounts that accept GP / Vixen dovetail plates.