GSO 200mm F/5 Newtonian Parabolic - 2' Dual Speed Crayford

Gsn2001ota

GSO Guan Sheng Optical
in stock

GSO 200mm f/5 Newtonian Parabolic - 2" Dual Speed Crayford

368,00 EUR
incl. 19 % Tax
excl.Shipping costs

Description

GSO 8" f/5 Parabolic Newtonian Telescope - OTA with tube rings and 8x50 finder
... powerful system for visual observation and imaging
... aperture 200mm (8") / focal length 1000 mm (f/5). Enhanced reflectivity (94%)

GSO Newtonian 8

GSO Newtonian telescopes meet high demands. Their parabolic main mirror is polished precisely and is superior to other telescopes made in far east. The mechanical system sets a benchmark, too. A solid steel tube and a robust Crayford focuser bring the stability necessary for astro imaging.

Advantages of the 200mm f/5 GSO Newtonian:

-- Diffraction limited parabolic main mirror with 94% reflectivity
-- Adjustable main- and secondary mirror cells
-- Better field illumination for photography by 64mm secondary mirror
-- 2" Crayford focuser with 1:10 dual speed transmission for precise focusing
-- Optimized back focus: even (D)SLR cameras can be brought into the focal plane
-- Stiff secondary spider vanes - no bending
-- Steel tube for a maximum of stiffness (superior to aluminium tubes)

The 2" dual speed Crayford focuser:

Its ball-beared design offers fine and smooth focusing even under heavy loads up to 2.5 kgs. A 10° twist of the low-speed wheel moves the drawtube by only 0.038 mm! Tack-sharp photos are no problem now.

The 200mm f/5 GSO main mirror:

BK-7, a very homogeneous optical glass, is the mirror's substrate. With the mirror cell's open design and a (standard) main mirror fan, fast cool-down times of approx. 15 mins guarantee observation or imaing without long waiting times.

GSO has many years of experience in crafting parabolic mirrors. So we can guarantee an optical performance better than only "diffraction limited". To make collimation easy, the main mirror has a centre mark.

Scope of delivery:
-- GSO 200mm f/5 Newtonian - Optical Tube Assembly with tube rings
-- 8x50 finder
-- 2" Crayford focuser with 1:10 dual speed transmission and reducer to 1.25"
-- 2" extension tube - to achieve focus with all kinds of eyepieces
-- Dust covers
-- 12V main mirror fan
-- Collimation manual

Technical details:
-- Aperture 200mm (8") / focal length 1000mm / photographic speed f/5
-- 94% enhanced reflectivity coatings for a brighter picture
-- Seconcary mirror: 63mm diameter (minor axis)
-- Field illumination: 28mm diam. (100%) / 41mm diam. (90%)
-- Weight: 9 kgs with tube rings and finder
-- Outer diameter: 230mm
-- Tube length: 900mm
-- 2" Crayford focuser with 1:10 dual speed transmission

In our opinion, Newtonians by GSO are superior to other comparable systems:

Since many years, we're GSO distributor and we know about the exceptional quality of GSO telescopes. The optical performance is on a very high (and even!) level. In opposite to other manufacturers, we never see "lemons" from GSO. What is more, a GSO system can grow with your demands:

-- For the 8" GSO Newtonian, we offer a Carbon Tube Upgrade Kit

-- Short back-focus Baader Steel Track Focuser upgrade is possible without the need of new tube bores.

-- We offer secondary mirrors of different sizes according to your special demands (e.g. planetary imaging or deep-sky-imaging with full-size sensors)

We recommend following products:

Eyepieces:

TSWA32 79,00 EUR* * excl.Shipping costs TS WA32 ERFLE Wide Angle Eyepiece - 32mm - 2" - 70° Field	HR5 59,00 EUR* * excl.Shipping costs HR Planetary Eyepiece - 5mm focal length - 1.25" - 60° WA	HR3 59,00 EUR* * excl.Shipping costs HR Planetary Eyepiece - 3,2mm focal length - 1.25" - 60° WA
HR8 59,00 EUR* * excl.Shipping costs HR Planetary Eyepiece - 8mm focal length - 1.25" - 60° WA	HR15 59,00 EUR* * excl.Shipping costs HR Planetary Eyepiece - 15mm focal length - 1.25" - 60° WA

Accessories:

TSUHCL2

79,00 EUR*

* excl.Shipping costs

TS Optics 2" Premium UHC Filter - more Contrast

TSND09

17,00 EUR*

* excl.Shipping costs

Grey (Neutral Density) Filter 1.25" - 13% Transmission

GSK8 8,00 EUR* * excl.Shipping costs GSO additional dust cover for 8" Newtonians and 8" RC	TSMotorfok 148,00 EUR* * excl.Shipping costs TS Focus motor for GSO Crayford focusers - precise focussing	GSCT-200 433,00 EUR* * excl.Shipping costs Carbon Tube Upgrade for 200mm / 8" GSO Newtonians

Mounts:

CAMGoto 731,00 EUR* * excl.Shipping costs Celestron Advanced GT mount - GoTo mount with tripod - 12kg	ADM 298,00 EUR* * excl.Shipping costs Celestron AS Advanced Mount CG5 - German Equatorial Mount	CGEM 1.561,00 EUR* * excl.Shipping costs Celestron CGEM - equatorial GoTo mount - max. 20kg payload

Optics Cleaning:

LA1

39,95 EUR*

* excl.Shipping costs

Laser collimator for Newtonians - 1.25"

TSLA

59,00 EUR*

* excl.Shipping costs

TS Newtonian Laser Collimator - 1.25" connection - full metal

30A041

90,00 EUR*

* excl.Shipping costs

Geoptik Quilt Bag for Newtons to 8" aperture - F/1200mm

Books:

Beobachteratlas

49,90 EUR*

* excl.Shipping costs

BeobachteratlasWF

89,90 EUR*

* excl.Shipping costs

Photo Acessories:

TSOAG9T2 248,00 EUR* * excl.Shipping costs Off Axis Guider - only 9mm length - with T2 adaptation	TSOAG9EOS 268,00 EUR* * excl.Shipping costs Off Axis Guider - only 9mm length - w/ Canon EOS adaptation	TSFA2 25,00 EUR* * excl.Shipping costs Adaptor 2" to T2 - low profile
BA2458400 125,00 EUR* * excl.Shipping costs Baader 2" Newtonian Coma Corrector - with T2 & M48 connection	TSKomakorr 119,00 EUR* * excl.Shipping costs TS Optics 2" Newtonian Telescope Coma Corrector from f/4	TSC-OAG 335,00 EUR* * excl.Shipping costs TS Coma Corrector & Off Axis Guider for Newtonian Telescopes
TSSU850-T2 25,00 EUR* * excl.Shipping costs Parfocal Adapter T2 for 8x50 finders by TS, GSO, Meade	TSSU850-C 25,00 EUR* * excl.Shipping costs Parfocal Adapter to C-Mount for 8x50 finder by TS, GSO, Meade

upUser reports

Image of M31 - with GSO 8" f/5 Newtonian

M31 Vorschaubild - GSO 200mm f5 Newton

Wolfi Ransburg made this picture with a Canon EOS 20DA SLR camera. Location: Emberger Alm in Carinthia. Coma corrector: Baader MPCC.

Link to a bigger version at the private Webpage of Wolfi Ransburg