Rigs Apochromatic refractors
William Optics Gran-Turismo 81 IV
Every camera in the catalogue on this telescope, at 382.4 mm and f/4.7, with the William Optics FLAT 6AIII (0.8x). 52 pairings have a page; 1 sensor is larger than the stated image circle and listed without one.
The telescope
Aperture81mm
Focal length382.4mm478 mm native
Focal ratiof/4.7
Image circle44.4mmwith the William Optics FLAT 6AIII (0.8x)
OTA weight3.90kgneeds a corrector
Figures from the maker’s page. Source. Provisional: the row has not yet had a second, human check.
Every camera
Sampling is the star’s FWHM in pixels at 2.5″ seeing; every band is a tradeoff, and wide fields are undersampled on purpose. Each camera name opens its page.
| Camera | Scale | Field | At 2.5″ | Image circle |
|---|---|---|---|---|
| Player One Ares-C Pro | 2.03″/px | 1.69 × 1.69° | 1.23pxundersampled | fits15.99 of 44.4 mm |
| Player One Poseidon-C Pro | 2.03″/px | 3.52 × 2.35° | 1.23pxundersampled | fits28.26 of 44.4 mm |
| Player One Poseidon-M Pro | 2.03″/px | 3.52 × 2.35° | 1.23pxundersampled | fits28.26 of 44.4 mm |
| Player One Uranus-C | 1.56″/px | 1.68 × 0.94° | 1.60pxpractical | fits12.85 of 44.4 mm |
| QHY294M Pro | 2.50″/px | 2.89 × 1.94° | 1.00pxundersampled | fits23.23 of 44.4 mm |
| QHY600M (SBFL front section) | 2.03″/px | 5.39 × 3.59° | 1.23pxundersampled | fits43.27 of 44.4 mm |
| QHY600M (standard, with CAA) | 2.03″/px | 5.39 × 3.59° | 1.23pxundersampled | fits43.27 of 44.4 mm |
| ToupTek ATR183C | 1.29″/px | 1.96 × 1.31° | 1.93pxpractical | fits15.73 of 44.4 mm |
| ToupTek ATR183M | 1.29″/px | 1.96 × 1.31° | 1.93pxpractical | fits15.73 of 44.4 mm |
| ToupTek ATR2110C | 6.47″/px | 3.48 × 2.19° | 0.39pxbadly undersampled | fits27.41 of 44.4 mm |
| ToupTek ATR2600C | 2.03″/px | 3.50 × 2.35° | 1.23pxundersampled | fits28.18 of 44.4 mm |
| ToupTek ATR2600M | 2.03″/px | 3.50 × 2.35° | 1.23pxundersampled | fits28.18 of 44.4 mm |
| ToupTek ATR294C | 2.50″/px | 2.86 × 1.95° | 1.00pxundersampled | fits23.10 of 44.4 mm |
| ToupTek ATR294M | 2.50″/px | 2.86 × 1.95° | 1.00pxundersampled | fits23.10 of 44.4 mm |
| ToupTek ATR3CMOS07100KMA | 2.43″/px | 2.16 × 1.48° | 1.03pxundersampled | fits17.47 of 44.4 mm |
| ToupTek ATR3CMOS07100KPA | 2.43″/px | 2.16 × 1.48° | 1.03pxundersampled | fits17.47 of 44.4 mm |
| ToupTek ATR432C | 4.85″/px | 2.16 × 1.48° | 0.51pxbadly undersampled | fits17.47 of 44.4 mm |
| ToupTek ATR432M | 4.85″/px | 2.16 × 1.48° | 0.51pxbadly undersampled | fits17.47 of 44.4 mm |
| ToupTek ATR533C | 2.03″/px | 1.69 × 1.69° | 1.23pxundersampled | fits15.97 of 44.4 mm |
| ToupTek ATR533M | 2.03″/px | 1.69 × 1.69° | 1.23pxundersampled | fits15.97 of 44.4 mm |
| ToupTek ATR585C | 1.56″/px | 1.68 × 0.94° | 1.60pxpractical | fits12.85 of 44.4 mm |
| ToupTek ATR585M | 1.56″/px | 1.68 × 0.94° | 1.60pxpractical | fits12.85 of 44.4 mm |
| ToupTek SkyEye24AC-plus | 3.20″/px | 5.39 × 3.59° | 0.78pxbadly undersampled | fits43.28 of 44.4 mm |
| ToupTek SkyEye26AC-plus | 2.03″/px | 3.50 × 2.35° | 1.23pxundersampled | fits28.18 of 44.4 mm |
| ToupTek SkyEye26AM-plus | 2.03″/px | 3.50 × 2.35° | 1.23pxundersampled | fits28.18 of 44.4 mm |
| ToupTek SkyEye45AC-plus | 2.37″/px | 5.40 × 3.60° | 1.05pxundersampled | fits43.32 of 44.4 mm |
| ToupTek SkyEye62AC-plus | 2.03″/px | 5.39 × 3.59° | 1.23pxundersampled | fits43.24 of 44.4 mm |
| ToupTek SkyEye62AM-plus | 2.03″/px | 5.39 × 3.59° | 1.23pxundersampled | fits43.24 of 44.4 mm |
| ZWO ASI071MC Pro | 2.58″/px | 3.53 × 2.34° | 0.97pxundersampled | fits28.29 of 44.4 mm |
| ZWO ASI1600MM Pro | 2.05″/px | 2.64 × 1.99° | 1.22pxundersampled | fits22.06 of 44.4 mm |
| ZWO ASI183MC Pro | 1.29″/px | 1.98 × 1.32° | 1.93pxpractical | fits15.86 of 44.4 mm |
| ZWO ASI183MM Pro | 1.29″/px | 1.98 × 1.32° | 1.93pxpractical | fits15.86 of 44.4 mm |
| ZWO ASI2400MC Pro | 3.20″/px | 5.39 × 3.59° | 0.78pxbadly undersampled | fits43.27 of 44.4 mm |
| ZWO ASI2600MC Air | 2.03″/px | 3.52 × 2.35° | 1.23pxundersampled | fits28.26 of 44.4 mm |
| ZWO ASI2600MC DUO | 2.03″/px | 3.52 × 2.35° | 1.23pxundersampled | fits28.26 of 44.4 mm |
| ZWO ASI2600MC Pro | 2.03″/px | 3.52 × 2.35° | 1.23pxundersampled | fits28.26 of 44.4 mm |
| ZWO ASI2600MM Air | 2.03″/px | 3.52 × 2.35° | 1.23pxundersampled | fits28.26 of 44.4 mm |
| ZWO ASI2600MM DUO | 2.03″/px | 3.52 × 2.35° | 1.23pxundersampled | fits28.26 of 44.4 mm |
| ZWO ASI2600MM Pro | 2.03″/px | 3.52 × 2.35° | 1.23pxundersampled | fits28.26 of 44.4 mm |
| ZWO ASI294MC Pro | 2.50″/px | 2.88 × 1.95° | 1.00pxundersampled | fits23.19 of 44.4 mm |
| ZWO ASI294MM Pro | 2.50″/px | 2.88 × 1.95° | 1.00pxundersampled | fits23.19 of 44.4 mm |
| ZWO ASI4400MC Pro | 2.37″/px | 5.39 × 3.59° | 1.05pxundersampled | fits43.27 of 44.4 mm |
| ZWO ASI461MM Pro | 2.03″/px | 6.56 × 4.93° | 1.23pxundersampled | sensor larger than the stated image circle54.82 mm diagonal, 44.4 mm stated with the William Optics FLAT 6AIII (0.8x) |
| ZWO ASI533MC Pro | 2.03″/px | 1.69 × 1.69° | 1.23pxundersampled | fits15.99 of 44.4 mm |
| ZWO ASI533MM Pro | 2.03″/px | 1.69 × 1.69° | 1.23pxundersampled | fits15.99 of 44.4 mm |
| ZWO ASI585MC Air | 1.56″/px | 1.68 × 0.94° | 1.60pxpractical | fits12.85 of 44.4 mm |
| ZWO ASI585MC Pro | 1.56″/px | 1.67 × 0.94° | 1.60pxpractical | fits12.78 of 44.4 mm |
| ZWO ASI585MM Air | 1.56″/px | 1.68 × 0.94° | 1.60pxpractical | fits12.85 of 44.4 mm |
| ZWO ASI585MM Pro | 1.56″/px | 1.67 × 0.94° | 1.60pxpractical | fits12.78 of 44.4 mm |
| ZWO ASI6200MC Pro | 2.03″/px | 5.39 × 3.59° | 1.23pxundersampled | fits43.27 of 44.4 mm |
| ZWO ASI6200MM Pro | 2.03″/px | 5.39 × 3.59° | 1.23pxundersampled | fits43.27 of 44.4 mm |
| ZWO ASI990MM Pro | 2.70″/px | 0.96 × 0.77° | 0.93pxundersampled | fits8.20 of 44.4 mm |
| ZWO ASI991MM Pro | 2.70″/px | 0.49 × 0.39° | 0.93pxundersampled | fits4.19 of 44.4 mm |
No sensor size in the catalogue, so no figures: Canon EF body + T-ring, Canon EF-S body + T-ring, Canon RF body + T-ring, Fujifilm X body + T-ring, L-mount (Leica / Panasonic / Sigma) body + T-ring, Micro Four Thirds body + T-ring, Nikon F body + T-ring, Nikon Z body + T-ring, Pentax K body + T-ring, QHY268C, QHY268M, QHY533C, QHY533M, Sony E / FE body + T-ring, ToupTek SkyEye24AC, ToupTek SkyEye62AC, ToupTek SkyEye62AM.
Last updated Computed from the catalogue when the site is builtEvery telescope