TS-Optics Photon 254 Carbon 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 Carbon 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.
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, dual speed. 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.
Additional specifications
Aperture ratio
f/4
Illuminated field 100
25 mm
Illuminated field 90
38 mm - thus suitable even for sensors up to full frame size - flats recommended
Diameter
303 mm / 309 mm at the front side
Connection threads at the tube rings
M6 thread (female) at both sides
59223
Data sheet
Aperture
254 mm (10")
Backfocus
Working distance 65 mm from the 2" receptacle with retracted draw tube
Focal length
1016 mm
Focuser
2" Monorail focuser, dual speed
Length
approx. 1000 mm
Limiting magnitude
14.7 mag
Manufacturer listed equipment
TS 254 mm f/4 PHOTON Newtonian OTA with carbon fiber tube 2" Monorail focuser with reduction to 1.25" 2" extension tube 35 mm 8x50 finder with bracket Dust covers for focuser and front side 12 V primary mirror fan Collimation manual
Manufacturer part number
TPC10F4
Model
TS-Optics Photon 254 Carbon OTA
Primary mirror
Parabolic primary mirror of BK7 with 94% reflection and protective quartz layer
Resolution
0.46"
Secondary mirror
88 mm minor axis with 94% enhanced reflection and protective quartz layer
Tube
Carbon tube with internal blackening
Weight
approx. 13 kg with tube rings and finder
Specific References
MPN
TPC10F4
Used this product? Share your experience with other astronomers.
Comments (0)
No customer reviews for the moment.
Your review appreciation cannot be sent
Report comment
Are you sure that you want to report this comment?
Report sent
Your report has been submitted and will be considered by a moderator.
Your report cannot be sent
Write your review
Review sent
Your comment has been submitted and will be available once approved by a moderator.
TS-Optics Photon 254 Carbon 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 Carbon OTA · Specifications checked against manufacturer data on 2026-11-04
