• SBIGCustom
  • Aluma AC4040

    SKU: AC-4040


    Introductory Pricing!  Our newest Scientific CMOS large format camera.  16 megapixel CCD with 9 micron pixels, Adaptive Optics capable, StarChaser SC-3 Guider compatible.


Product Description

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

Coming Soon!

The SBIG Aluma AC Series represents the state-of-the-art in Advanced Scientific CMOS cameras for astronomical imaging systems. The camera’s advanced design permits high speed download via the USB 3.0 connection to the control computer. The Aluma AC4040 uses the GPixel GSENSE4040 CMOS sensor with 16 million pixels at 9 microns. The sensor measures almost 37mm square. The Aluma AC series has powerful two stage cooling and supports optional water cooling. Aluma AC cameras can be operated directly from a 12VDC 8A power supply.

Design features include:

Superior Cooling

Proven pin heatsink design shared with industry leading STX series cameras gets the heat out while providing low vibration.  Includes SmartCoolingTM intelligent thermoelectric cooling and fan operation.

Water Circulation Ready

For high ambient temperature environments, the liquid cooling option improves thermal performance and helps minimize dark current.

User Rechargeable Desiccant

SBIG pioneered including a high-tech user-replaceable cartridge with ceramic filter and molecular sieve desiccant. Unlike competing cameras, which require factory service when their chamber desiccant eventually saturates out, the user can easily recharge the desiccant.  This eliminates the need for costly service – not to mention the associated down-time and shipping costs.  This feature is especially important in high-humidity locations.

Electronic and Mechanical Shutters

The GSENSE CMOS sensor has an electronic rolling shutter.  In addition the Aluma AC series cameras include a mechanical shutter to enable convenient dark-frame subtraction for optimal performance and sensitivity.  This is essential for remote/robotic operation.

Optional Seven Position Filter Wheel

The Aluma AC4040 is compatible with the SBIG FW7-STX filter wheel, utilizing 50 mm square filters.

Self-Guiding and Adaptive Optics Options Available

The available SBIG StarChaser SC-3 is an excellent low-cost option for integrated autoguiding in front of the filters, and it supports our SBIG AO-X Adaptive Optics accessory.


The AO-X uses a tip-tilt window to quickly and precisely adjust the image position in response to autoguider feedback.  With Adaptive Optics there is no backlash, stiction, or lag, and the movements are precise and accurate.  This allows the AO-X to not only remove the effects of periodic error, drift, and wind gusts, but also reduce the effects of atmospheric seeing.  When used with an Aluma AC camera, the AO-X requires the StarChaser SC-3.

For more information please see AO-X.

USB 3.0 Interface

The Aluma AC includes a USB 3.0 interface port for high speed downloads.  For installations where longer cable lengths are required, the port is also compatible with USB 2.0.

I2C AUX Port

The STX cameras have a convenient auxiliary control port (also known as an I2C AUX port), which controls the filter wheel and provides optional external trigger interfaces.  Unlike older SBIG models, the AUX port is not used for AO-X control, as this function is now handled by the optional SBIG StarChaser SC-3 off-axis guiding camera.

Included Accessories

All Aluma AC cameras include a deluxe carrying case, universal power supply, Aluma AC4040 power extension cable, USB 3.0 cable, and MaxIm LT software.


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

Additional Information

A/D Converter

Dual 12 bit with HDR capability

Adaptive Optics Option

AO-X with StarChaser SC-3

Sensor Grade

Class 2, Class 1

Sensor Size

36.8 mm x 36.8 mm

Computer Interface

USB 3.0

Cooling Delta

~ 40 °C typical, water cooling option included

Dark Current e/p/s at 0 C

0.3 e-/p/s typical


0.001-3600 sec

Filter Size

50mm Square

Filter Wheel Option


Full Frame Download

0.2 second

Full Well Capacity

74,000 e- (depends on mode)

Imaging Sensor

GPixel GSENSE4040

Imaging / Pixel Array

4096 px x 4096 px

OAG Option

StarChaser SC-3

OS Compatibility

Windows 7, 8, 10 x86/x64, MacOS 10.14 “Mojave” x86 binaries, Ubuntu 18.04 LTS x64, Raspbian Buster armhf, Ubuntu MATE arm64

Pixel Digitization Rate

100 MHz

Pixel Size

9 μm


12 VDC 8A

Power Cable

US, European

Read Noise

3.7 e- typical

Self-Guiding In Front of Filters

Yes with StarChaser SC-3


Rolling electronic, Mechanical dark shutter

Temperature Regulation


Total Pixels

16.8 million pixels


3.5 lbs / 1.6 kG


Product overview

A technical overview of the Aluma AC4040.


Operating manual

Installation, and operating instructions for Aluma AC series cameras.

Coming Soon.

Backfocus Table

Backfocus configuration table



Drivers and Camera Configuration Utility

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


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: