Classic Cassegrain 300 mm

Availability: manufactured on request; Type: reflector

Our line of Cassegrain reflectors is directed towards visual astronomy (it excels at planetary, moon, globular clusters, nebulae observation) as well as planetary imaging.
It offers great light gathering abilities; its high quality mirrors being placed in a beautifully executed chassis which makes collimation very easy.
Contrary to popular beliefs, Cassegrain optics if designed and executed properly can deliver pinpoint stars (no coma) in both 1.25″ and 2″ eyepieces.
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:
* 2" rack and pinion type focuser from Starlight Instruments, 50mm travel;
* 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 – 300 mm; Focal ratio – F/15; Focal length – 4500 mm; Central Obstruction – 25%;
Clear aperture – 300 mm; Focal ratio – F/20; Focal length – 6000 mm; Central Obstruction – 19%;
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:
F/15 version – 1060 x 410 x 450 mm (L x l x h; considers handle, dovetail and focuser added length/height);
F/20 version – 1030 x 410 x 450 mm (L x l x h; considers handle, dovetail and focuser added length/height);
Weight – 19 kg;
Usable back-focus – ~190 mm;

Pricing (2019):
6990 Euro, including VAT 23%. Net export price – 5683 Euro (non-EU countries)Supremax33 version
9390 Euro, including VAT 23%. Net export price – 7634 Euro (non-EU countries)Fused Silica/Quartz version
10455 Euro, including VAT 23%. Net export price – 8500 Euro (non-EU countries)Cellular version

Included items:
– 2" Starlight Instruments focuser, rack and pinion, 50mm travel;
– 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;
– 500 mm D-type dovetail
– handle;

Coatings:
standard coating reflectance: 92% (SiO overcoat), included in the price.
optional enhanced coating reflectance: 96% (TiO overcoat) = +260 €, including 23% VAT; net price = 211 €.

Optional accessories to consider when ordering:
Dovetail, Losmandy Type, 500 mm length, lightweight = 180 Euro, including VAT 23%; Net price = 146 Euro;
Padded case = 200 Euro, including VAT 23%; Net price = 163 Euro;
Dual controller for primary's heater and fans = 185 Euro, including VAT 23%; Net price = 150 Euro;
Electronic focusing package for secondary mirror = 800 Euro, including VAT 23%; Net price = 650 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.

Number of units manufactured/ordered: 11
Number of F/15 units manufactured/ordered: 2
Number of F/17 units manufactured/ordered: 1
Number of F/20 units manufactured/ordered: 9
Units available for ordering: manufactured based on order.
Average lead time: ~ 9 months.
Prices subject to change without notice.

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