TS-Optics Photon 254 f/4 OTA This PHOTON Newtonian combines a 254 mm (10") aperture with a 1016 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 254 f/4 OTA · Specifications checked against manufacturer data on 2026-11-04
This PHOTON Newtonian combines a 254 mm (10") aperture with a 1016 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 ring clamps. 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.
TS-Optics manufacturer documentation
Exact named TS manufacturer model and its published technical table checked. Unpublished dimensions, capacities and package items are not inferred.
| 100 illuminated field of view | 25 mm - ideal for APS-C format sensors with matching coma corrector |
|---|---|
| 90 illuminated field of view | 38 mm - therefore also suitable for larger sensors (flats make sense) |
| Resolving power | 0.46 arcseconds |
| Limiting magnitude visual | 14.7 mag |
| Weight of the tube | 14.8 kg with rings and finder |
| Tube dimensions | length 980 mm, diameter 303 mm |
Ficha técnica
Referencias específicas
TS-Optics Photon 254 f/4 OTA This PHOTON Newtonian combines a 254 mm (10") aperture with a 1016 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 254 f/4 OTA · Specifications checked against manufacturer data on 2026-11-04
