TS-Optics Photon 203 f/4 OTA This PHOTON Newtonian combines a 203 mm (8") aperture with a 800 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 203 f/4 OTA · 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/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 metal tube is fitted with a 2" Monorail focuser, dual speed, adapter to 1.25" and compression rings. 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.
Exact named TS manufacturer model and its published technical table checked. Unpublished dimensions, capacities and package items are not inferred.
Additional specifications
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)
Limiting magnitude visually
13.3 mag
Dimensions of the tube
Length 730 mm, diameter 230 mm
57997
Scheda tecnica
Apertura
203 mm (8")
Focale
800 mm
Rapporto focale
f/4
Focheggiatore
2" Monorail focuser, dual speed, adapter to 1.25" and compression rings
Attrezzatura indicata dal produttore
TS Photon 8" f/4 Newtonian Tube rings 2" extension tube 35 mm for visual observing Dust cover for the front opening Primary mirror fan with battery holder 8x50 finder with quick release Vixen/EQ5 style dovetail bar - length 335 mm
Codice produttore
TPM8F4
Modello
TS-Optics Photon 203 f/4 OTA
Specchio primario
Parabolic primary mirror of BK7 with 94% reflection and protective quartz layer
Risoluzione
0.58 arc seconds
Specchio secondario
70 mm minor axis with 94% enhanced reflection and protective quartz layer
Superficie di appoggio sotto gli anelli
Flat support surface with an M6 thread
Superficie di appoggio sopra gli anelli
Flat support surface with a 1/4? internal thread (tripod socket)
Materiale del tubo
Steel
Peso del tubo
8.4 kg with tube rings and finder
Riferimenti Specifici
MPN
TPM8F4
Hai usato questo prodotto? Condividi la tua esperienza con altri astronomi.
Commenti (0)
Ancora nessuna recensione da parte degli utenti.
Non è stato possibile inviare il tuo giudizio sulla recensione
Segnala commento
Sei sicuro di voler segnalare questo commento?
Segnalazione inviata
La tua segnalazione è stata inviata e sarà esaminata da un moderatore.
Non è stato possibile inviare la tua segnalazione
Scrivi la tua recensione
Recensione inviata
Il tuo commento è stato acquisito e sarà disponibile dopo l'approvazione da parte di un moderatore.
TS-Optics Photon 203 f/4 OTA This PHOTON Newtonian combines a 203 mm (8") aperture with a 800 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 203 f/4 OTA · Specifications checked against manufacturer data on 2026-11-04
