30% @ 400nm 45% @ 500nm
65% @ 600nm
55% @ 700nm
32% @ 800nm
| Model | CDK20 |
| Manufacturer | PlaneWave Instruments |
| Principle | Corrected Dall-Kirkham |
| Aperture | 508mm (20") |
| Central Obstruction | 39% |
| Focal Length | 3454mm |
| Focal Ratio | f/6.8 |
| Plate Scale | 1.0047mm/arcminute or 16.75micron/arcsec |
| Length | 1194mm |
| Weight | 63.5kg (140 US lb) |
| Back Focus | 226mm from focusser mounting ring 147.6mm from racked in focusser |
| Control | Hand paddle. "xmtel" program linked with "xephem" program |
Page Links: Telescope Mount Primary Camera Filters STV Camera
| Manufacturer | Celestron |
| Principle | German Equatorial |
| Altitude adjust | ~0.88º per thread |
| Azimuth adjust | ~0.55º per thread |
Page Links: Telescope Mount Primary Camera Filters STV Camera
| Model | STL-6303E (KAF6303E sensor) SBIG Brochure (3.7MB) |
| Manufacturer | SBIG |
| Pixel size | 9 x 9 microns (0.5375arcsecs for CDK20 plate scale ) |
| Pixels | 3060 x 2040 |
| Sensor size | 27.5 x 18.4mm (27.4 x 18.27 arcminutes for CDK20 plate scale ) |
| Quantum efficiency |
30% @ 400nm 45% @ 500nm 65% @ 600nm 55% @ 700nm 32% @ 800nm |
| Full well capacity | 100,000 e |
| Dark current | 0.3e/sec @ 0C (0.21ADU unbinned, 0.13ADU binned) |
| Read noise | 13.5e RMS (9.6ADU unbinned, 5.9ADU binned) |
| A/D gain | 1.4e/ADU unbinned (0.71ADU/e), 2.3e/ADU binned (0.43ADU/e) |
| A/D bits | 16 bit (65536) |
| Exposure | 0.12 to 3600 s, 10ms resolution |
| Cooling | -40C from ambient |
| Full-frame download time | 14sec |
Page Links: Telescope Mount Primary Camera Filters STV Camera
| Type | Internal 5 slot filter wheel in SBig camera |
| UBVRI set Graph 1 U 2 B 3 V 4 R 5 I | SBig STL 50mm filters (made by Custom Scientific) nm nm nm nm nm |
| RGB set RGB Graph Lum Graph 1 R 2 G 3 B 4 Clear (IR blocked) 5 Luminence | SBig STL 50mm filters (made by Custom Scientific) 580-680 nm 475-580 nm 390-490 nm 350-1100 nm 390-680 nm |
Page Links: Telescope Mount Primary Camera Filters STV Camera
| Manufacturer | SBIG Manual |
| Pixels | 640 x 400 |
| Pixel Size | 7.4 x 7.4 microns |
| Image modes | 640 x 400 binned 2x2 (Normal) 656 x 480 binned 2x2 (Wide) 320 x 200 binned 1x1 (Zoom) |
| ADC bits | 10 bits for 1x1 binning Otherwise up to 16 bits (inc Track & Accumulate) |
| Exposure times | 0.001 to 600 secs |
| Cooling | -25C from ambient |
| E-Finder Focal length | 100mm |
| Focal Ratio | f/4 |
| Field of View | 2.7 x 2 degrees |
Page Links: Telescope Mount Primary Camera Filters STV Camera
