TS-Optics Photon 203 Carbon G2 This PHOTON Newtonian combines a 203 mm (8") aperture with a 800 mm focal length at f/3.94. Its parabolic primary mirror and fast optical geometry support deep-sky imaging and visual astronomy.
Manufacturer model: TS-Optics Photon 203 Carbon G2 · Specifications checked against manufacturer data on 2026-11-04
This PHOTON Newtonian combines a 203 mm (8") aperture with a 800 mm focal length at f/3.94. Its parabolic primary mirror and fast optical geometry support deep-sky imaging and visual astronomy.
Optics and illumination
The manufacturer specifies 94% enhanced mirror reflectivity with a protective quartz layer. Secondary-mirror size and illuminated-field figures are specific to this aperture; the table distinguishes fully illuminated field from partial illumination where TS publishes both.
Focusing and tube
The carbon fibre tube is fitted with a 2" monorail focuser with 1/10 speed reduction, adapter to 1.25" and ring clamps. Use the published dimensions and assembled-weight configuration when selecting a mount; cameras and other added equipment contribute further load.
Imaging configuration
A suitable coma corrector is optional for wide-field imaging. Native focuser backfocus is available mechanical travel/spacing, not automatically the sensor-spacing requirement of a chosen corrector. Keep primary and secondary collimation aligned for the installed camera train.
Model specification
Generation 2 carbon model kept distinct from older carbon and steel Photon 8-inch tubes. Manufacturer gives 90 mm backfocus and 675 mm length for this G2 configuration.
Generation 2 carbon model kept distinct from older carbon and steel Photon 8-inch tubes. Manufacturer gives 90 mm backfocus and 675 mm length for this G2 configuration.
Additional specifications
Resolving power
0.58"
Dimensions of the tube
length 675 mm, diameter 230 mm
Weight of the tube
7.5 kg with rings
87668
Scheda tecnica
Apertura
203 mm (8")
Back focus
working distance approx. 90 mm from the 2" receptacle with fully retracted draw tube
Focale
800 mm
Rapporto focale
f/3.94
Focheggiatore
2" monorail focuser with 1/10 speed reduction, adapter to 1.25" and ring clamps
Corsa del focheggiatore
50 mm
Magnitudine limite
13.3 mag
Attrezzatura indicata dal produttore
Optical tube CNC tube rings Dovetail bars 2x Dust caps (front and back) Finder shoe mounted on tube
Codice produttore
TPC8F4G
Modello
TS-Optics Photon 203 Carbon G2
Specchio primario
Parabolic primary mirror with 94% forced reflection and quartz protective coating
Specchio secondario
70 mm minor axis with 94% forced reflection and quartz protective coating
Riferimenti Specifici
MPN
TPC8F4G
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TS-Optics Photon 203 Carbon G2 This PHOTON Newtonian combines a 203 mm (8") aperture with a 800 mm focal length at f/3.94. Its parabolic primary mirror and fast optical geometry support deep-sky imaging and visual astronomy.
Manufacturer model: TS-Optics Photon 203 Carbon G2 · Specifications checked against manufacturer data on 2026-11-04
