Ritchey - Chretien 400mm

Availability: manufactured on request; Type: reflector

Our line of Ritchey-Chretien reflectors is designed to offer non-compromising imaging quality, by integrating everything needed in a package containing high-quality hand-figured optics, top-quality finish & mechanics.
We’re delivering the full range of substrates for these telescopes, starting with basic borosilicate glass (Supremax33), moving upwards in value/quality by using Ultra Low Expansion glass like Fused Silica/Quartz while for those of you who desire best optical quality finish, we do deliver also cellular blanks. The latter has the advantage of quickest cool down coupled with reduced weight (sensible weight differences/gains are observable in bigger sizes, 350 & 400mm).

Main features:
* hand-figured Ritchey - Chretien optics;
* precision adjustment of primary & secondary mirror;
* portable, medium size reflector telescope;
* truss type chassis design for quick cool down;
* carbon fiber and aluminium alloy high quality construction.

Specifications & technical data:
Clear aperture – 400 mm; Focal ratio – F/8; Focal length – 3200 mm; Central Obstruction – 38%, linear;
Primary substrate – Supremax33, Fused Silica/Quartz or Cellular;
Secondary substrate – Fused Silica/Quartz;
Primary mirror cage material – Carbon Fiber;
Truss tubes material – Carbon Fiber.

Dimensions:
1150 x 525 x 560 mm (L x l x h; considers handle, dovetail & focuser added height/length);
Weight : ~35 kg;
Usable back-focus : ~275 mm, from back-plate;
Usable back-focus :  88.8 mm, from corrector.

Pricing (2019):
16000 Euro, including VAT 23%. Net export price – 13008 Euro (non-EU countries) Supremax33 version
18450 Euro, including VAT 23%. Net export price – 15000 Euro (non-EU countries) Fused Silica/Quartz version
19990 Euro, including VAT 23%. Net export price – 16252 Euro (non-EU countries) Cellular version

Included items:
– 3.5" Starlight Instruments focuser, rack and pinion, 38mm travel;
– Electronic focusing package for secondary mirror or Electronic focusing package for FTF3515, Focuser Boss II Kit (HSM35 motor + Controller);
– Field Corrector, 60mm corrected circle diameter;
– shroud pack (secondary casing shroud, secondary cage shroud, truss shroud);
– side plates (pair);
– riser + finder shoe (Starlight FSB-CH);
– primary mirror cooling fans;
– primary mirror heater;
– primary mirror hard cover;
– secondary mirror heater;
– 500 mm D-type dovetail;
– handle;
– back-plate handles pair;

– Dual controller for primary's heater and fans

Coatings:
standard coating reflectance: 92% (SiO overcoat), included in the price.
optional enhanced coating reflectance: 96% (TiO overcoat) = +310 €, including 23% VAT; net price = 252 €.

Optional accessories to consider when ordering:
Dovetail, Losmandy Type, 500 mm length, lightweight = 180 Euro, including VAT 23%; Net price = 146 Euro;
Padded case = 350 Euro, including VAT 23%; Net price = 285 Euro;

Visual accessories:
A prism or mirror diagonal will be needed, together with good quality eyepieces, to be able to extract the most of your new telescope.

Imaging accessories:
We can manufacture adapters and extensions to suit one's observing and/or imaging needs.

Number of units manufactured/ordered: 2
Units available for ordering: Fused Silica/Quartz version, on stock.
Average lead time: please inquire.
Prices subject to change without notice.

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