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  • STF-402M

    SKU: STF-402


    This product is discontinued.  This page is included for archival purposes only. 


Product Description

Note: For software and user manual downloads, please click the Downloads tab above.

High QE Low Cost Camera

The SBIG STF-402M is a compact, economical, high QE camera with a scientific grade full frame CCD.  It is excellent for educational use.  Options include an internal RGBC color filter wheel.  Many users with larger telescopes and cameras consider The STF-402M to be the ultimate camera to use for guiding due to its high sensitivity and generous field of view.

New Software Included!

Starting October 1, 2019 all new SBIG STF series cameras now include a license for our renowned MaxIm LT software, a $200 value, at no extra cost.  Owners of older STF cameras can purchase a license at a discounted price of $99.


qe_402_medSimple and Powerful: These were the design goals for the STF-402M.  The small size and light-weight of these cameras make them very easy to handle and set up.  The STF-402M also has an optional internal RGBC filter wheel.  These cameras have a photometric quality, even-illumination shutter for automatic dark frames.  The low noise and extraordinary QE of these sensors make these cameras among the most sensitive CCD cameras available at any price. With a peak QE of nearly 85%, these cameras bow to no others when it comes to recording faint detail in dim objects.  Simply put, there is nothing in their price range that can touch them for sensitivity.

Enhanced Cooling


An enhanced cooling package is now standard equipment.  The improvements consist of (a) a larger heat sink installed in the camera, (b) a larger 50mm magnetic levitating fan and fan guard, (c) a new back plate with openings to accommodate the extension of the fan housing and guard, and (d) improved internal power supply for the TE cooler. No additional external power is required.

The graph at left below above shows the improvement in cooling performance as a function of delta from ambient temperature as a result of the new design.  In our first production prototype camera with the enhanced cooling package, the maximum delta achieved was -35 degrees C below ambient at 100% power. After allowing the camera to stabilize, it was able to regulate the temperature at a delta of -31 degrees C from ambient with less than 95% power in a warm room (approx. 24C). We feel comfortable specifying typical performance of approximately 30 degrees C below ambient, regulated to +/- 0.1 degree C (user’s set point). The graph at right below shows the typical dark current as a function of the absolute temperature of the CCD.


Image or Autoguide 

Electronic relays provide standard autoguider outputs from the RJ-11 jack, so these cameras can be used as a highly sensitive autoguider with a larger field of view than most other autoguiders. The computer interface is USB 2.0. The high-speed readout rate is approximately 4.25 megapixels per second. A full frame, high-resolution image from the STF-402M will download in less than 1/4 second.  A regulated power supply is built into the camera so you can operate directly from a 12V battery or other unregulated 12VDC source.  A universal power supply is included for operation from 100 to 240VAC.  The STF-402M is so sensitive one is virtually guaranteed to find a guide star in the field of view no matter where it is pointed using a modest finder scope.   This makes the STF-402M not only an excellent educational camera but a sought after camera used to guide larger scopes.

Additional Information

A/D Converter

16 bits

Adaptive Optics Option




Sensor Size

6.9 mm x 4.3 mm

Computer Interface


Cooling Delta

20c °C

Dark Current e/p/s at 0 C

1 e-/p/s typical


0.09-3600 sec

Filter Size


Filter Wheel Option


Full Well Capacity

100,000 e-

Imaging Sensor


Imaging / Pixel Array

765 px x 510 px

OAG Option


OS Compatibility

Windows 7, 8, 10 x86/x64, MacOS 10.14 “Mojave” x86 binaries, Ubuntu 18.04 LTS x64, Ubuntu Mate arm64

Pixel Digitization Rate

5 MPix/sec

Pixel Size

9×9 μm


12 VDC

Power Cable

US, European

Read Noise

13 e- typical

Remote Guide Head


Self-Guiding In Front of Filters




Temperature Regulation


Total Pixels

390,000 pixels


1.25 lbs


User Manual

Installation, and operation instructions for all STF series cameras.


Technical Overview

Technical overview of the STF-402.


Specification Sheet

Product Specifications for the STF-402.


STF-402/1603/3200 Backfocus

Technical drawing showing backfocus on STF-402/1603/3200.


Backfocus Table

Backfocus configuration table




The SBIG Universal Driver is distributed via SBIG Driver Checker 64 on Windows, and via an installer on Mac OSX. Keeping your drivers up to date is the best way to ensure your camera runs smoothly, so remember to update your drivers regularly.

Download (Win) Download (OSX)


CCDOPS is a free program that operates USB based SBIG cameras.

Download (Win) Download (OSX)

Software Development Kit

Software development kit for the Windows platform.

Download (Win)