TS-PHOTON 8" F4 Advanced Newtonian Telescope with Carbon Tube

TS-PHOTON 203/800mm Advanced Newtonian with Carbon Tube - OTA

Astrophotography is easy for you with this compact Newtonian from the TS-PHOTON series. Due to the aperture ratio of f/4, this astrograph provides pure speed and therefore short exposure times. Of course, we also offer the matching coma corrector TS SUPERFLAT. Thus this PHOTON Newtonian becomes a very good astrograph.

Immerse yourself in the world of deep-sky observing with the PHOTON 8" f/4. The large aperture and the enhanced reflectivity of 94% offer unforgettable observations beyond the solar system. Watch exciting details, like spiral arms of galaxies or fine structures in planetary nebulae.

The Newtonian is still well supported by portable mounts like the GoTo mount Celestron Advanced VX or the Skywatcher EQ5 mount. Purely visual observers can also use an altazimuth mount. You can find suitable mounts in the "recommended accessories" section.
 

The advantages of the carbon composite tube:

The TS-PHOTON Newtonian comes with a high-quality carbon composite tube. Beside the weight advantage of approximately 1.5 kg, the main advantage is the better stability of the focus when the temperature changes. That is imortant for astrophotography. Then the temperature falls, metal contracts and the focus moves. Readjusting the sharpness becomes necessary. This combination of tube and mirror makes readjusting the sharpness usually obsolete even for long-term exposures. The images become sharper.
 

Berger Anti Reflex Paint for best possible internal blackening:

For this PHOTON Newtonian, we use Berger Antireflexfarbe (anti-reflex paint). It darkens the inside of the tube as well as velours foil. The big advantage, besides a lower weight, is that the paint almost gathers no dust. The optics stay clean. With velours foil, dust gathers at the primary mirror very quickly.

The image at left shows the difference between Antireflexfarbe and standard solutions. The diagram above shows a direct comparison between standard school board paint and Berger anti-reflex paint.



 

General information and features of the TS-PHOTON Newtonian telescopes:

♦ Fast parabolic optics with outstanding contrast and very good sharpness for planetary observations.
♦ High-quality 2" Crayford focuser with 1:10 dual speed for 2" and 1.25" accessories.
♦ Focus position perfect for DSLR and other cameras.
♦ All popular 1.25" and 2" eyepieces can be used without problems.
♦ Brighter image through enhanced 94% reflectivity of primary and secondary mirror.
♦ Motor focus can be retrofitted at any time.
♦ A 0.5 mm thin stainless steel spider provides stability. Astrophotographers will envy you for the delicate and sharp spikes around bright stars.
♦ The active ventilation for the primary mirror provides for a clearly faster cooling down.
♦ Adjustable primary mirror cell and secondary cell completely made of metal.

 

Aperture:	203 mm (8")
Focal length:	800 mm
Focal ratio:	f/4
Primary mirror:	Parabolic primary mirror of BK7 with 94% reflection and protective quartz layer
Secondary mirror:	70 mm minor axis with 94% enhanced reflection and protective quartz layer
100% illuminated field:	25 mm - ideal for APS-C format sensors with suitable coma corrector
90% illuminated field:	38 mm - thus suitable also for larger sensors (flats recommended)
Resolution:	0.58 arc seconds
Limiting magnitude visually:	13.3 mag
Focuser:	2" Crayford focuser, dual speed, adapter to 1.25" and compression rings
Tube:	Carbon composite tube with internal blackening
Tube weight:	7.5 kg with tube rings and finder
Dimensions of the tube:	Length 730 mm, diameter 230 mm

In the box:
♦ TS Photon 8" f/4 Newtonian with carbon composite tube
♦ Tube rings with GP EQ5 style dovetail bar
♦ 2" extension tube 35 mm for visual observing
♦ Dust cover for the front opening
♦ Primary mirror fan
♦ 8x50 finder with quick release
♦ Vixen / EQ5 style dovetail bar - length 335 mm