Ended up buying a second 60mm guidescope on CN for my new Explore Scientific ED 127mm and now have 2 guidescope cameras and wondering which one is better suited for my new scope. My original camera was the Altair GPCam2 130 and the 60mm came with a Starlight xpress costar. The specs don't really mean that much to me yet as I am a newbie. All I know is that the Starlight is more expensive but that isnt always a clear indicator.
The Altair specs are:
ALTAIRGP130M: APTINA AR0130 MONO CMOS sensor
- Sensor Size: 1/3" (4.8x3.6mm)
- Exposure duration shortest/longest:
- 0.115ms (0.000115 secs) / 800 secs 13.33mins (trigger mode)
- 0.115ms (0.000115 secs) / 5000ms (5 secs) (video mode)
- Bit depth: 8bit & 12bit mode switchable
- Pixel size microns: 3.75x3.75 um
- Resolution in pixels: 1280x960
- Recording System: Still Picture and Video
- Region of Interest (ROI) support: Yes, in SharpCap & AltairCapture
- Approx. Max frame rates (assuming computer Bus and Hard Drive operating at full bandwidth)*:
- 8 bit mode:
- 1280x960 - 27-30fps
- 640x480 - 55fps ROI mode
- 320x240 - 104fps ROI mode
- 12 bit mode - approx 50% of above.
- * Based on average user reports. May be revised with more data. Shorter exposure durations yield faster frame rates. An expensive PC does not guarantee a fast frame rate.
- Sensor QE / Quantum Efficiency: Approx. 78%
- Gain Sensitivity: 6.5V/ lux-sec
- Dynamic Range: 82dB
- SNR Maximum: 44dB
- Readout: Progressive Scan
- Shutter: Electronic Rolling Shutter
And the Starlight specs are:
- Imager type: Aptina MT9M001 mono CMOS chip with low dark current and anti-blooming.
- Full resolution Pixel data: Pixel size: 5.2 microns square
- Image format: 1304 x 1024 pixels
- Image area: 6.66 mm (Horizontal) x 5.32 mm (Vertical)
- Spectral Response: QE max at 620 nM (approx. 65-percent), 35-percent at 400 nM and 770 nM
- Readout Noise: Less than 40 electrons RMS, typically only 20 electrons.
- Anti-blooming: Overload margin greater than 1000x.
- Dark current: Dark frame saturation time greater than 10 minutes Less than 1 electrons/second at more than 10-degrees C ambient temperature
- Data format: 10-bits.
- Computer Interface: Built-in USB 2.0 compatible interface
- Image download time: Typically 0.1 seconds at full resolution using USB 2.0
- Power requirements: USB powered
- Cooling system: Ambient air cooling
- Size: 32 x 60 mm black anodized aluminum barrel with 25 x 0.75 mm, C-mount thread at the CCD window end and input/output plugs at the rear
- Weight: approx. 45 g (0.099-pound)
Advice welcome. Thanks!