Telescope autoguiding
USB 2.0 + ST4 connectivity supports guide corrections during long-exposure astrophotography.
Guide camera
ToupTek GPM462C is a astronomy guide camera using the IMX462 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.

Application context
Choose the GPM462C when you need a compact IMX462-based guider with USB 2.0 + ST4, 2.9 µm pixels and 380–690 nm response.
USB 2.0 + ST4 connectivity supports guide corrections during long-exposure astrophotography.
1.25-inch telescope nosepiece / CS-mount compatibility suits compact guide scopes and appropriately adapted off-axis guiders.
IMX462 sensitivity helps maintain stable star centroids for deep-sky imaging sessions.
2.1 MP (1920 × 1080) capture provides a secondary short-exposure imaging role in compact telescope systems.
Specifications
36 specification rows
The GPM462C is an astronomy camera in the GPM guide series, built around a Sony IMX462 color CMOS sensor, 2.1 MP (1920 × 1080) resolution, 2.9 µm pixels, frame rates up to 17.8 fps, a USB 2.0 + ST4 interface. It suits guide camera where reliable imaging performance and interface compatibility matter.
| Model | GPM462C |
|---|---|
| Status | Current |
| Application | Guide camera |
| Sensor | Sony IMX462 color CMOS |
| Sensor Type | 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 |
| Frame Rate | 17.8 fps |
|---|---|
| ADC | 12-bit |
| Peak QE | >89% |
| Dynamic Range | 74.1 dB |
| Read Noise | 2.4–0.76 e⁻ |
| Full Well | 12.7 ke⁻ |
| Spectral Range | 380–690 nm |
| Interface | USB 2.0 + ST4 |
|---|---|
| Mount | 1.25-inch telescope nosepiece / CS-mount |
| Cooling | Passive cooling |
| Sensor Diagonal | 6.39mm |
|---|---|
| Maximum SNR | 41dB |
| 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× - 500× |
| 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 C 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 | 70 grams |
| Supported Systems | Windows XP/Vista/7/8/10 (32 & 64 bit) Mac OS X, Linux |
| SDK Support | Native C/C++, C#/VB.NET, Python Java, DirectShow, Twain, etc. |
Technical media
Official sensor-response, performance, and mechanical imagery for the GPM462C.



System integration
Use these checks to connect GPM462C to the surrounding optical, mechanical and control system. Every value shown is taken from this model's own specification record.
Technical FAQ
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: Sony IMX462 color CMOS · Sensor Type: 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.
Frame Rate: 17.8 fps · Interface: USB 2.0 + 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.
Dynamic Range: 74.1 dB · Read Noise: 2.4–0.76 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.
Tell us your sensor, resolution, spectral range, frame-rate, interface, and software requirements and we will confirm the matching configuration and lead time.
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
Compare GPM462C with the closest available models in the GPM guide family.
| Selection parameter | GPM462C (current) | GPM174M | GPM462M |
|---|---|---|---|
| Sensor | Sony IMX462 color CMOS | Sony IMX249 monochrome CMOS | Sony IMX462 monochrome CMOS |
| Resolution | 2.1 MP (1920 × 1080) | 2.3 MP (1920 × 1200) | 2.1 MP (1920 × 1080) |
| Sensor size | 1/2.8-inch, 5.57 × 3.13 mm | 1/1.2-inch, 11.3 × 7.03 mm | 1/2.8-inch, 5.57 × 3.13 mm |
| Pixel size / frame rate | 2.9 µm | 5.86 µm | 2.9 µm |
The IMX462 appears in 7 models across the catalogue, differing in cooling, shutter, interface and colour filter. Compare them side by side before settling on a variant.
Compare the GPM462C with other GPM guide models and astronomy cameras in the range.
Choosing a camera
How to tell whether this sensor is the right technology for your photon budget, and what to check before committing.
Scientific camerasWhich sensor technology your photon budget actually needs, why rolling and global shutter answer different questions, and how to check the data can leave the camera at all.
Open guide
Scientific camerasHow physical charge transport versus in-pixel voltage conversion dictates readout speed, read noise, blooming, fill factor, and fixed-pattern noise in scientific detectors.
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Scientific imagingCalculate object-space pixel size, field of view, Rayleigh resolution, and sampling using real MAX and sMAX sensor formats.
Open guide