Telescope autoguiding
USB 2.0 Type-C + ST4 connectivity supports guide corrections during long-exposure astrophotography.
Guide camera
GPM662C
ToupTek GPM662C is a astronomy guide camera using the IMX662 sensor, with 2.1 MP (1920 × 1080), 2.9 µm pixels and 17.8 fps. Designed for telescope autoguiding, guide-scope and off-axis guiding, long-exposure tracking. Available from Precisometer for professional astronomy systems.
- Sensor
- Sony IMX662 color CMOS
- Sensor Type
- STARVIS 2 back-illuminated color CMOS
- Resolution
- 2.1 MP (1920 × 1080)
- Pixel Size
- 2.9 µm
- Frame Rate
- 17.8 fps
- Interface
- USB 2.0 Type-C + ST4
Application context
Why this design is used
Choose the GPM662C when you need a compact IMX662-based guider with USB 2.0 Type-C + ST4, 2.9 µm pixels and 380–690 nm response.
Guide-scope and off-axis guiding
1.25-inch telescope nosepiece / CS-mount compatibility suits compact guide scopes and appropriately adapted off-axis guiders.
Long-exposure tracking
IMX662 sensitivity helps maintain stable star centroids for deep-sky imaging sessions.
Lunar and planetary acquisition
2.1 MP (1920 × 1080) capture provides a secondary short-exposure imaging role in compact telescope systems.
Specifications
GPM662C
36 specification rows
The GPM662C is an astronomy camera in the GPM guide series, built around a Sony IMX662 color CMOS sensor, 2.1 MP (1920 × 1080) resolution, 2.9 µm pixels, frame rates up to 17.8 fps, a USB 2.0 Type-C + ST4 interface. It suits guide camera where reliable imaging performance and interface compatibility matter.
Sensor & Imaging
| Model | GPM662C |
|---|---|
| Status | Current |
| Application | Guide camera |
| Sensor | Sony IMX662 color CMOS |
| Sensor Type | STARVIS 2 back-illuminated color CMOS |
| Sensor Size | 1/2.8-inch, 5.57 × 3.13 mm |
| Resolution | 2.1 MP (1920 × 1080) |
| Pixel Size | 2.9 µm |
| Shutter Type | Rolling shutter |
Performance
| Frame Rate | 17.8 fps |
|---|---|
| ADC | 12-bit |
| Peak QE | >91% |
| Dynamic Range | 75.2 dB |
| Read Noise | 6.81–0.48 e⁻ |
| Full Well | 39.034 ke⁻ |
| Spectral Range | 380–690 nm |
Interface & Thermal
| Interface | USB 2.0 Type-C + ST4 |
|---|---|
| Mount | 1.25-inch telescope nosepiece / CS-mount |
| Cooling | Passive cooling |
Additional Published Specifications
| Sensor Diagonal | 6.45mm |
|---|---|
| Maximum SNR | 45.9dB |
| Back Focal Distance / Adapter | Yes |
| Protective Window | IR/AR |
| Color Filter Array | RGGB |
| Maximum Frame Rate (USB 2.0) | 12-bit: 8.9 FPS @ 1920×1080 8-bit: 17.8 FPS @ 1920×1080 |
| Exposure Time Range | 0.1ms - 1000s |
| Gain Range | 1× - 150× |
| Frame Buffer | Built-in |
| Gain Modes | HCG/LCG dual mode switching |
| Guide Interface | Built-in ST4 autoguider port |
| Camera Adapter | Standard 1.25-inch for telescope connection Standard CS adapter for industrial lens |
| Back Focal Distance | 8.5mm (17.5mm with C-mount, 12.5mm with CS-mount) |
| External Dimensions | Diameter 37mm × Height 72.4mm |
| Weight | 65.3 grams |
| Supported Systems | Windows XP/Vista/7/8/10/11 (32 & 64 bit) Mac OS X, Linux |
| SDK Support | Native C/C++, C#/VB.NET, Python Java, DirectShow, Twain, etc. |
Technical media
Performance graphs and technical drawings
Official sensor-response, performance, and mechanical imagery for the GPM662C.
System integration
Integration and compatibility
Use these checks to connect GPM662C to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
- Lens and microscope interface
- Mount: 1.25-inch telescope nosepiece / CS-mount
- Use a lens image circle that covers the sensor and check flange distance before adding C/CS, F-mount or M42 adapters.
- Sensor and sampling
- Sensor: Sony IMX662 color CMOS · Sensor Type: STARVIS 2 back-illuminated color CMOS
- Match pixel pitch to the diffraction-limited spot the optics deliver. Sampling finer than the optics resolve multiplies data volume without adding information; sampling coarser discards resolution you have paid for.
- Interface and data rate
- Frame Rate: 17.8 fps · Interface: USB 2.0 Type-C + ST4
- Confirm the host can sustain the interface bandwidth continuously, not in burst. A camera that outruns the write path stalls acquisition rather than dropping quietly to a lower rate.
- Cooling and noise floor
- Dynamic Range: 75.2 dB · Read Noise: 6.81–0.48 e⁻
- Judge these figures at the exposure time you will actually use. Cooling matters where dark current accumulates over seconds; read noise dominates short exposures where it never does.
Technical FAQ
Integration questions for GPM662C
What lens mount is required for the GPM662C?
Mount: 1.25-inch telescope nosepiece / CS-mount. Use a lens image circle that covers the sensor and check flange distance before adding C/CS, F-mount or M42 adapters.
What sensor and pixel pitch does the GPM662C use?
Sensor: Sony IMX662 color CMOS · Sensor Type: STARVIS 2 back-illuminated color CMOS. Match pixel pitch to the diffraction-limited spot the optics deliver. Sampling finer than the optics resolve multiplies data volume without adding information; sampling coarser discards resolution you have paid for.
How does the GPM662C connect to the acquisition computer?
Frame Rate: 17.8 fps · Interface: USB 2.0 Type-C + ST4. Confirm the host can sustain the interface bandwidth continuously, not in burst. A camera that outruns the write path stalls acquisition rather than dropping quietly to a lower rate.
What is the noise performance of the GPM662C?
Dynamic Range: 75.2 dB · Read Noise: 6.81–0.48 e⁻. Judge these figures at the exposure time you will actually use. Cooling matters where dark current accumulates over seconds; read noise dominates short exposures where it never does.
Need help choosing?
Tell us your sensor, resolution, spectral range, frame-rate, interface, and software requirements and we will confirm the matching configuration and lead time.
Zoom lenses for the GPM662C
See which of our C-mount zoom lenses suit this sensor, with the field of view, µm per pixel and depth of field at each zoom setting.
Model selection
Nearby series comparison
Compare GPM662C with the closest available models in the GPM guide family.
| Selection parameter | GPM662C (current) | GPM462M | GPM662M |
|---|---|---|---|
| Sensor | Sony IMX662 color CMOS | Sony IMX462 monochrome CMOS | Sony IMX662 monochrome CMOS |
| Resolution | 2.1 MP (1920 × 1080) | 2.1 MP (1920 × 1080) | 2.1 MP (1920 × 1080) |
| Sensor size | 1/2.8-inch, 5.57 × 3.13 mm | 1/2.8-inch, 5.57 × 3.13 mm | 1/2.8-inch, 5.57 × 3.13 mm |
| Pixel size / frame rate | 2.9 µm | 2.9 µm | 2.9 µm |
Other cameras on the IMX662 sensor
The IMX662 appears in 4 models across the catalogue, differing in cooling, shutter, interface and colour filter. Compare them side by side before settling on a variant.
Related astronomy cameras
Compare the GPM662C with other GPM guide models and astronomy cameras in the range.
- GPM662MGPM guide · Astronomy CamerasGuide camera
- GPM174MGPM guide · Astronomy CamerasGuide camera
- GPM462MGPM guide · Astronomy CamerasGuide camera
- GPM462CGPM guide · Astronomy CamerasGuide camera
- SkyEye62AMSkyEye full-frame DSO · Astronomy CamerasDeep-sky cooled
- SkyEye62ACSkyEye full-frame DSO · Astronomy CamerasDeep-sky cooled
