Telescope autoguiding
USB 2.0 + ST4 connectivity supports guide corrections during long-exposure astrophotography.
Guide camera
GPM174M
ToupTek GPM174M is a astronomy guide camera using the IMX249 sensor, with 2.3 MP (1920 × 1200), 5.86 µm pixels and 16 fps. Designed for telescope autoguiding, guide-scope and off-axis guiding, long-exposure tracking. Available from Precisometer for professional astronomy systems in the Benelux.
- Sensor
- Sony IMX249 monochrome CMOS
- Sensor Type
- Pregius global-shutter monochrome CMOS
- Resolution
- 2.3 MP (1920 × 1200)
- Pixel Size
- 5.86 µm
- Frame Rate
- 16 fps
- Interface
- USB 2.0 + ST4
Applications & selection
GPM174M applications
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
IMX249 sensitivity helps maintain stable star centroids for deep-sky imaging sessions.
Near-infrared guide-star detection
380–1100 nm monochrome response can improve guide-star availability with suitable optics and filters.
When to choose this camera
Choose the GPM174M when you need a compact IMX249-based guider with USB 2.0 + ST4, 5.86 µm pixels and 380–1100 nm response.
Specifications
GPM174M
35 specification rows
The GPM174M is an astronomy camera in the GPM guide series, built around a Sony IMX249 monochrome CMOS sensor, 2.3 MP (1920 × 1200) resolution, 5.86 µm pixels, frame rates up to 16 fps, a USB 2.0 + ST4 interface. It suits guide camera where reliable imaging performance and interface compatibility matter.
Sensor & Imaging
| Model | GPM174M |
|---|---|
| Status | Current |
| Application | Guide camera |
| Sensor | Sony IMX249 monochrome CMOS |
| Sensor Type | Pregius global-shutter monochrome CMOS |
| Sensor Size | 1/1.2-inch, 11.3 × 7.03 mm |
| Resolution | 2.3 MP (1920 × 1200) |
| Pixel Size | 5.86 µm |
| Shutter Type | Global shutter |
Performance
| Frame Rate | 16 fps |
|---|---|
| ADC | 12-bit |
| Peak QE | >89% |
| Dynamic Range | 72 dB |
| Read Noise | 6.48–3.96 e⁻ |
| Full Well | 33.4 ke⁻ |
| Spectral Range | 380–1100 nm |
Interface & Thermal
| Interface | USB 2.0 + ST4 |
|---|---|
| Mount | 1.25-inch telescope nosepiece / CS-mount |
| Cooling | Passive cooling |
Additional Published Specifications
| Sensor Diagonal | 13.31mm |
|---|---|
| Maximum SNR | 45dB |
| Back Focal Distance / Adapter | Yes |
| Protective Window | IR/AR |
| Color Filter Array | RGGB |
| Maximum Frame Rate (USB 2.0) | 12-bit: 8.5 FPS @ 1920×1200 8-bit: 16.2 FPS @ 1920×1200 |
| Exposure Time Range | 0.42ms - 1000s |
| Gain Range | 1× - 480× |
| Frame Buffer | Built-in |
| 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
Performance graphs and technical drawings
Official sensor-response, performance, and mechanical imagery for the GPM174M.
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.
Other cameras on the IMX249 sensor
The IMX249 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.
Related astronomy cameras
Compare the GPM174M with other GPM guide models and astronomy cameras in the range.
- GPM662MGPM guide · Astronomy CamerasGuide camera
- GPM662CGPM 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
