GSO Ritchey-Chrétien 254/2000 OTA
incl. 27% VAT
Including 27% VAT:2 765.94 € (885 100 HUF)
Net price (for non-EU customers):2 177.90 € (696 929 HUF)
Budapest shop:For order only
Delivery:Please contact our colleagues before ordering: +36-1-202-5651
Product code: GSRC10M
GSO Ritchey-Chrétien 254/2000 OTA
More about the product
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.|
The 10" f/8 RC Astrograph can illuminate a field diameter of max. ca. 60mm (including optional RC corrector). Without corrector, the usable field has ca. 30mm diameter. Here, you have a pure mirror system that can be used without UV/IR cut filter. Most of the CCD cameras are sensitive in this spectral range.
The image is absolutely free from chromatic abberations and the resulution is higher than most apochromatic refractors in this price range.
|Optical Design:||true RC system consisting of a hyperpolic main- and secondary mirror.|
|Optical dimensions:||Aperture 10" (254mm), focal length: 2000mm, Photographic speed: f/8|
|Primary mirror:||Quarz - precision 1/12 Lambda or better. The main mirror is shifting free and fix installed. Reflectivity 99%, dielectrical coating.|
|Secondary mirror:||Quarz with 99% reflectivity coating. Mounted fully adjustable in a stiff cell. Central obstruction: 112 mm (44%)|
|Tube:||Metal design weight 15.7 kgs, Carbon design weight 14,6 kgs. Length 735mm incl. 3" focuser, tube diameter 294mm.|
|Focal plane:||110mm behind 2" connection - enough space for accessories|
|Baffling system:||Computer optimized, highest straylight supression.|
|Focuser:||Heavy-duty 3" monorail focuser (see description below)|
|Prism rail:||Losmandy-style 3" prism rail, adapts directly to Losmandy, CGE pro and other mounts.|
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The product comes with 1 year warranty.
Budapest shop:Continuously in stock (4+ pieces)
Delivery:Delivery in 24-48 hours
You are eligible for accessory discount only when purchased tugether with a main product. Up to two accessories of a kind.