Refractor 180 - 185 mm

Availability: manufactured on request; Type: refractor

180/185 mm alongside our 200mm F6.5, represent the ultimate portable size refractor and offers a step-up in aperture, when compared to its smaller brother the 160 mm.
Although having a short focal ratio for its aperture, this instrument is highly recommended to astronomers who enjoy a pure visual experience of Moon, planets, double stars and deep-sky objects as well as imagers looking to take advantage of its big aperture and increased resolution.
Suitable for imaging, the 180mm F/7 or 185mm F/6.8 paired with our Field Corrector will deliver a corrected image circle of ~55 mm diameter, allowing use of cameras equipped with full frame or 52mm diagonal chip for capturing wide field deep sky images.
Like all our objective lenses, oil-spaced lens design helps in quickly reaching ambient temperatures, which is a big advantage when using these OTAs in places where significant temperature change can occur during observing/imaging sessions.

Main features:
* 3.5" rack and pinion type focuser from Starlight Instruments
* dew shield with rotate & lock feature
* bino-viewer friendly design
* portable 'big size' refractor
* Oil-spaced design for best possible light transmission & highest contrast.

Specifications & technical data:
Core glass used – S-FPL55
Clear aperture – 180 mm
Focal length – 1260 mm; Focal ratio – F/7
Clear aperture – 185 mm
Focal length – 1260 mm; Focal ratio – F/6.8
Optical Quality (please click for our optical manufacturing specifications)

Dimensions:
Minimum Length – 1160 mm (fully retracted dew shield)
Maximum Length – 1330 mm (fully extended dew shield)
Back-focus – 220 mm
Tube diameter – 185 mm
Dew shield diameter – 217 mm
Weight – 17 kg, including rings.

Pricing (2022):
180mm F/7 = 19 990,00 Euro, includes VAT 23%. Net export price – 16 252,00 Euro (non-EU countries)
FTF3545/3.5″ Starlight focuser, 114 mm travel, dual-speed; with finder bracket and dust cap
* Estimated delivery time: 6 - 10 months from order *

185mm F/6.8 = N/A, includes VAT 23%. Net export price – N/A Euro (non-EU countries)
FTF3545/3.5″ Starlight focuser, 114 mm travel, dual-speed; with finder bracket and dust cap *
* Product sold out *

Included items:
Pair of CNC rings, 1(one) 500mm dovetail - D-type (Losmandy), transport case.

Mechanical accessories:
Dovetail, D-type (Losmandy), 500 mm length, lightweight = 180,00 Euro, including VAT 23%; Net Price = 146,00 Euro
Handle, 400mm length = 100,00 Euro, including VAT 23%; Net Price = 81,00 Euro.

Visual accessories:
A prism or mirror diagonal will be needed, together with good quality eyepiece, to be able to extract the most of your new telescope.
This refractor telescope offers a 220mm back-focus thus please consider a 50mm extension for single eyepiece visual use and imaging using a field corrector (no reduction/amplification factor).

Imaging accessories:
Field Corrector = 738,00 Euro, including VAT 23%. Net export price – 600,00 Euro (non-EU countries); Corrected Field = ~55 mm
Electronic focuser control (motor with integrated controller, from Optec) = 660,00 Euro, including VAT 23%; Net price = 537,00 Euro
Adapters and extensions to suit one's observing and/or imaging needs.

Number of 180mm F/7 units manufactured/ordered: 15
Delivery time from order (approximative): see above.

Number of 185mm F/6.8 units manufactured/ordered: 20
Product unavailable/sold out.

* Prices subject to change without notice.

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