Telescope autoguiding
USB 2.0 + ST4 connectivity supports guide corrections during long-exposure astrophotography.
Guide camera
ToupTek GPCMOS02000KMA is a astronomy guide camera using the IMX290 sensor, with 2.1 MP (1920 × 1080), 2.9 µm pixels and 18 fps. Designed for telescope autoguiding, guide-scope and off-axis guiding, long-exposure tracking. Legacy model retained for replacement, compatibility and support enquiries.

Application context
Choose the GPCMOS02000KMA when you need a compact IMX290-based guider with USB 2.0 + ST4, 2.9 µm pixels and 380–1100 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.
IMX290 sensitivity helps maintain stable star centroids for deep-sky imaging sessions.
380–1100 nm monochrome response can improve guide-star availability with suitable optics and filters.
Specifications
23 specification rows
The GPCMOS02000KMA is an astronomy camera in the GPCMOS guide series, built around a Sony IMX290 monochrome CMOS sensor, 2.1 MP (1920 × 1080) resolution, 2.9 µm pixels, frame rates up to 18 fps, a USB 2.0 + ST4 interface. It suits guide camera where reliable imaging performance and interface compatibility matter.
| Model | GPCMOS02000KMA |
|---|---|
| Status | Discontinued / legacy support |
| Application | Guide camera |
| Sensor | Sony IMX290 monochrome CMOS |
| Sensor Type | STARVIS back-illuminated monochrome 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 | 18 fps |
|---|---|
| ADC | 12-bit |
| Peak QE | >81% |
| Dynamic Range | 82 dB |
| Read Noise | 0.84–0.53 e⁻ |
| Full Well | 11.2 ke⁻ |
| Spectral Range | 380–1100 nm |
| Interface | USB 2.0 + ST4 |
|---|---|
| Mount | 1.25-inch telescope nosepiece / CS-mount |
| Cooling | Passive cooling |
| Sensor Diagonal | 6.39mm |
|---|---|
| Maximum SNR | 40dB |
| Protective Window | IR/AR |
| Color Filter Array | RGGB |
Technical media
Official sensor-response, performance, and mechanical imagery for the GPCMOS02000KMA.



System integration
Use these checks to connect GPCMOS02000KMA 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 IMX290 monochrome CMOS · Sensor Type: STARVIS back-illuminated monochrome 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: 18 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: 82 dB · Read Noise: 0.84–0.53 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 GPCMOS02000KMA with the closest available models in the GPCMOS guide family.
| Selection parameter | GPCMOS02000KMA (current) | GPCMOS01200KPF | GPCMOS02000KPA |
|---|---|---|---|
| Sensor | Sony IMX290 monochrome CMOS | Sony IMX225 color CMOS | Sony IMX290 color CMOS |
| Resolution | 2.1 MP (1920 × 1080) | 1.2 MP (1280 × 960) | 2.1 MP (1920 × 1080) |
| Sensor size | 1/2.8-inch, 5.57 × 3.13 mm | 1/3-inch, 4.9 × 3.7 mm | 1/2.8-inch, 5.57 × 3.13 mm |
| Pixel size / frame rate | 2.9 µm | 3.75 µm | 2.9 µm |
The IMX290 appears in 5 models across the catalogue, differing in cooling, shutter, interface and colour filter. Compare them side by side before settling on a variant.
Compare the GPCMOS02000KMA with other GPCMOS 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.
Open guide
Scientific imagingCalculate object-space pixel size, field of view, Rayleigh resolution, and sampling using real MAX and sMAX sensor formats.
Open guide