TS-Optics Photon 154 f/3.9 OTA This PHOTON Newtonian combines a 154 mm (6") aperture with a 600 mm focal length at f/4. Its parabolic primary mirror and fast optical geometry support deep-sky imaging and visual astronomy.
Manufacturer model: TS-Optics Photon 154 f/3.9 OTA · Specifications checked against manufacturer data on 2026-11-04
This PHOTON Newtonian combines a 154 mm (6") aperture with a 600 mm focal length at f/4. Its parabolic primary mirror and fast optical geometry support deep-sky imaging and visual astronomy.
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.
The metal tube is fitted with a 2" Monorail focuser with 1/10 dual speed, adapter to 1.25" and compression ring. Use the published dimensions and assembled-weight configuration when selecting a mount; cameras and other added equipment contribute further load.
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.
Manufacturer calls 154/600 model nominal f/4; the store title rounds it to f/3.9. Aperture and focal length are retained without changing title.
TS-Optics manufacturer documentation
Manufacturer calls 154/600 model nominal f/4; the store title rounds it to f/3.9. Aperture and focal length are retained without changing title.
| Tube dimensions | Length 530 mm, diameter 178 mm |
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Data sheet
Specific References
TS-Optics Photon 154 f/3.9 OTA This PHOTON Newtonian combines a 154 mm (6") aperture with a 600 mm focal length at f/4. Its parabolic primary mirror and fast optical geometry support deep-sky imaging and visual astronomy.
Manufacturer model: TS-Optics Photon 154 f/3.9 OTA · Specifications checked against manufacturer data on 2026-11-04
