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GSN1507Foto

GSO Guan Sheng Optical
in stock
TS 6" F/5 Newtonian Telescope with Corrector Astrophotography


399,00 EUR
incl. 19 % Tax
excl. 7,20 EUR Shipping costs


Description

TS Photo Newtonian by GSO - 150mm aperture - f/5 with coma corrector - ready for astrophotography
... powerful and sharp Newtonian with a good coma corrector, and 2" crayford focuser with 1:10 microtransmission

TS 150mm f5 photo newtonian telescope with coma corrector

Why spend more money when You can save it for other things with this excellent 6" f/5 Newtonian for astro photography? It offers all advantages of a well-designed Newtonian:

-- Parabolic main mirror with diffraction-limited mirror
-- Enough back focus to reach focus even with DSLR cameras
-- Very good 2" Crayford focuser with 1:10 micro transmission
-- steel tube instead of wobbly aluminium tube - you can use heavy cameras without loosing collimation
-- High-grad correction of the coma inherent to Newtonian systems (coma corrector is included)
-- Good field illumination by adequate secondary mirror (minor axis Ø 50mm)
-- 94% enhanced reflection for a brighter image and shorter exposure times

The rigid 2" Crayford Focuser with 1:10 microtransmission:

GSO photo Newtonian 150mm f/5

The 2" Crayford Focuser with 1:10 micro transmission is included. Accessories are clamped with a brass ring; the standard 1.25" reducer is also equipped with a brass ring. Even with higher loads, the focuser does not tilt. In combination with the micro transmission, pinpoint stars across the entire field are the result.

The TS 0,95x Coma Corrector:

TS Koma Korrektor

The TS coma correktor is part of this telescope's standard delivery content. It has a 2" filter thread on the telescope side and a M48 thread on the camera side. If you want to use a SLR camera, all you need is a M48 ring for your specific camera model. Of course nearly any other CCD camera can be adapted, too.

The TS Coma Corrector converts the focal lengh to 712mm and the focal ratio to f/4,7. The combination offers a very well corrected field for Chips to 30mm diameter.

TS 150mm photo newtonian telescope with camera

Technical details:
Aperture / focal length / photographic speed 150mm / 750mm / f/5
Optical design Diffraction limited parabolic Newtonian with coma corrector
Back Fokus ca. 60mm above the 2" receptacle
Camera connection via the coma corrector's M48 thread
Secondary mirror 50mm Ø (minor axis) - 33% linear obstruction
Weight of the OTA 5.9kgs
Tube solid steal - diameter 178mm - length 690mm

Scope of delivery:

-- OTA 150/750mm
-- 2" Crayford focuser with 1:10 micro transmission
-- 50mm extension tube 2" for visual purposes
-- 2" TS coma correktor
-- 6x30 viewfinder



Advantages of the GSO photographic Newtonian compared with f/5 systems with front side corrector lens:

Fast Newtonians must be corrected for photography. This can happen by introducing a Maksutov or Schmidt corrector plate or (like this model) by using a coma corrector close to the focal plane.

A Maksutov or Schmidt-corrector makes the OTA a closed system. The theoretical advantage of reduced tube seeing is not really an issue with 150mm aperture - on the other hand, its high price and the heavy weight of a full-aperture corrector plate is. But a glass plate on the front side gathers dew quite quickly so one needs a dew heater or at least a long dew cap. A classical newtonian has its main mirror deeply inside the tube and the secondary faces inside the tube. So dewing can only occur under really worse conditions.

The open system of a classical Newtonian is an advantage for fast cool-down times because of air interchange in- and outside the OTA. The telescope is ready for use in shorter time.


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upUser reports

M31 - captured by Ingo Klever with the GSO 150/900mm Newtonian

This is a full-frame image with only a minimum of software processing. Even in the edges, the star images are okay.
Integration time: 10x600 seconds with the Canon EOS 20D
Coma correction with Baader coma corrector (as described above)

M31 GSO Newton 150-750mm 
Click on image for full resolution.

Congratulations to this good result!

------------------

Link to a good photo of Saturn and Moon throuhg the GSO Newtonian 150/750mm


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