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SBIG STC-428-OEM Scientific CMOS Imaging Camera.

The STC-428-OEM is designed to be used as a component in instruments for medical imaging, laboratory instruments, low-light industrial inspection, and other applications.  The basic camera platform can be modified to meet your mechanical requirements including mounting, packaging, accessories, and more.  Options such as a mechanical shutter or filter wheel can be added.  Software API support is provided for a variety of operating systems including embedded Linux applications.

An evaluation kit is available, which includes all the accessories and software you need to get your evaluation up-and-running quickly.  Engineering support is provided to help you with your integration process.

See below for more information.

Download Product Data Sheet

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Product Description


Problem:  We need to integrate a compact, low cost, yet high performance imaging camera for our demanding low-light-level application

Solution:  STC-428-OEM provides extremely high sensitivity, low noise 7 megapixel imaging in a compact, easily integrated package with complete engineering support

The STC-428-OEM is our most popular scientific CMOS camera for OEM applications such as ELISA microplate readers, colorimetry, fluorescence, and other low-light level imaging applications.  The STC-428-OEM features:

  • High sensitivity, low noise 7 megapixel IMX428 imaging sensor
  • Electronic global shutter for fast exposure times (0.001 to 3600 sec.)
  • High-speed USB 3.0 interface (USB 2.0 compatible)
  • Downloads in under 50 milliseconds (depending on computer speed)
  • Stack Pro™ automatic in-camera sub-exposure stacking
  • Regulated two-stage cooling with delta ~ -30C
  • SmartCooling™ active temperature regulation to 0.1 degrees C for high calibration stability
  • Volume pricing available
  • Application engineering support
  • Customization options for your application, including mechanical shutter, filter wheel, packaging modifications, adapters
  • Accepts Nikon and Canon EOS lens adapters
  • Windows-based evaluation software available
  • Multiplatform software API and sample code available

For years mature CCD sensor technology, embodied in our venerable STF-83oo-OEM camera, set the standard for high sensitivity, low noise, high dynamic range, and images free of pattern noise.

The new STC-428-OEM scientific CMOS camera represents a major improvement over CCD technology.  Compared with previous CCD models, the STC-428-OEM features higher sensitivity (78% QE versus 56%), significantly lower read noise (2.5 e- versus 9.3 e-), and 20X faster readout.

While a single exposure on the IMX428 sensor can equal CCD dynamic range, the combination of fast readout and very low read noise allows for stacking many shorter to produce greater dynamic range than previously possible.  The built-in StackPro™ capability can automatically divide your exposure into up to 16 shorter sub-exposures, and stack them inside the camera prior to download.  This increases dynamic range without imposing greater processing requirements on the host computer.

Our SmartCooling™ active regulation maintains the sensor temperature to within 0.1ºC, and minimizes fan speed based on heat sink temperature for longer life and quieter operation.

Sensor Specifications:

  • SONY IMX428 CMOS imaging sensor
  • 3208 x 2200 pixels / 7.1 megapixel
  • 4.5 micron pixels
  • 17.6 mm diagonal
  • Peak QE 78%
  • Typical QE:
    • Red (635-700 nm) ~ 63%
    • Green (520-560 nm) ~ 78%
    • Blue (450-490 nm) ~ 75%
  • 12-bit A/D conversion with low-gain and high-gain modes
  • Very low read noise ~ 2.5e-
  • Very low dark current 0.1 e-/pixel/sec typical @ -5C
  • 80 dB dynamic range

The STC-428-OEM supports several optional gain modes:

  • Low Gain
    • 12-bit data
    • Gain 5.5 e-/ADU
    • Full Well ~ 22,500 e-
    • Read Noise ~5 e-
  • Medium Gain
    • 12-bit data
    • Gain 2.45 e-/ADU
    • Full Well ~ 10,000 e-
    • Read Noise ~ 2.3 e-
  • High Gain
    • 12-bit data
    • Gain 1.2 e-/ADU
    • Full Well ~ 5,000 e-
    • Read Noise ~ 1.9 e-


The STC-428-OEM scientific CMOS camera features StackPro™, a revolutionary feature that performs image stacking inside the camera.

While the IMX428 sensor has dynamic range on a par with its CCD predecessor, it is limited to 12 bit data (0-4095).  At the same time it also has far lower read noise, which means you can stack many more shorter exposures without degrading signal-to-noise ratio.  As great as this sounds it does result in a lot of extra disk usage and post-processing.

StackPro™ performs the stacking automatically, inside the camera.  It automatically subdivides your exposure into up to 16 individual sub-exposures, and stacks them inside the camera prior to download.  This eliminates the excessive amounts of data cluttering up your hard drive.

As an example, by stacking 16 sub-exposures inside the camera you can get:

  • Low Gain 16X Stacking
    • 16-bit data
    • Gain 5.5 e-/ADU
    • Effective Full Well ~ 880,000 e-
    • Read Noise ~20 e-
  • Medium Gain 16X Stacking
    • 16-bit data
    • Gain 2.45 e-/ADU
    • Effective Full Well ~ 160,000 e-
    • Read Noise ~ 9.2 e-
  • High Gain 16X Stacking
    • 16-bit data
    • Gain 1.2 e-/ADU
    • Effective Full Well ~ 80,000 e-
    • Read Noise ~ 7.6 e-

For comparison, our STF-8300M CCD camera sports typical read noise of 9.3 e-, with a full well depth of 25,000 e-.  In the medium gain 16X stack mode, the STC-428-OEM has similar read noise and yet has over six times the dynamic range!

Engineering Support

Our engineers and programmers are available to assist you in evaluating the camera and integrating it into your equipment.

Our powerful Windows-based evaluation software helps you quickly assess the camera’s potential for your application.  Our multiplatform API allows you to quickly integrate the camera into your application, whether running on desktop systems or embedded hardware.  Sample code is available.  Our programmers are available to assist you with integration into your application.

Customization is available.  We can customize mechanical mounting, redesign or even remove the outer shell, or add options to meet your requirements.  We can also build full custom hardware if required.

Standard Options Available

In addition to full custom modifications, we have standard options available including:

  • Internal mechanical shutter for dark frame calibration
  • Integrated 8 position filter wheel (similar to our STC-7 integrated filter wheel)
  • Add-on 16 position filter wheel
  • Lens adapters

We can provide a customized evaluation kit upon request.  Please contact us for quotation.

Volume Discounts Available

STC-428-OEM is available with volume pricing designed to meet your cost objectives.  Ask us for a quotation.


Our products are compliant with CE, FCC, and IC requirements. RoHS, REACH, and conflict mineral compliance documentation is available.

Diffraction Limited has been certified by British Standards Institution (BSI) to ISO 9001:2015 Quality Management under certificate number FM 719560.

STC-428-OEM Camera Evaluation Package Includes

  • SBIG STC-428 monochrome imaging camera
  • Evaluation / integration engineering support
  • T-Thread lens mount
  • 4-40 front panel screw mounts
  • 1/4-20 tripod mount
  • 2″ nosepiece adapter
  • Universal power supply
  • USB 3.0 cable
  • MaxIm LT evaluation software (Windows)
  • USB stick for software and manuals
  • Carrying case

In addition your evaluation package can be customized to add various standard and custom options.

Download Product Data Sheet

Additional Information

Binning Modes

1×1, 2×2

Computer Interface

USB 3.0 (USB 2.0 compatible)

Cooling Delta

30 °C


0.001 – 3600 seconds

Full Frame Download

90 ms typical

Imaging / Pixel Array

3208 x 2200 pixels

OS Compatibility

Windows 7, 8, 10 x86/x64. Contact us for Linux support.

Peak QE

78% typical

Pixel Size

4.5 x 4.5 micron


12VDC, 4A max


Global Shutter (electronic)

Temperature Regulation


Total Pixels

7.1 megapixel


1.7 lbs


Operating manual


Backfocus Calculator Spreadsheet

This Excel spreadsheet helps you calculate backfocus distance for your system. If you do not have Excel it can be uploaded into Google Sheets.


Drivers and Camera Configuration Utility

This camera uses the DL Imaging driver package. Download the latest drivers and camera configuration utility.


ASCOM Driver

Provides compatibility with many third party control applications. Please install the main driver package (above) first.


MaxIm LT Software

Camera owners can request a MaxIm LT license here (camera serial number required):


To get started immediately, request the full MaxIm DL Pro demo version here (click Demo tab):


Once you receive your MaxIm LT license, simply replace your demo license using Help menu Enter License.

MacOS and Linux Drivers

Available by request. Please post in our support forum, Aluma section:


Software Development Kit

Available by request. Please post in our support forum, Aluma section:


Firmware Updates

OEM customized firmware is not available online. Generic firmware for the Evaluation version may be found in our Firmware Archive here: