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Astronomy and Scientific Imaging Solutions

Quality is our Culture

Why do people trust Diffraction Limited to deliver high-quality SBIG cameras and solutions for astronomical observations, laboratory imaging, and life sciences? Our cameras have a reputation for outstanding reliability and our staff’s attention-to-detail and focus on customer satisfaction are a big part of our culture. There is more to it than this. As our CEO Douglas...

Part I: Fast without the furious: Why your SBIG CCD camera doesn’t have USB 4.0

Part I: Fast without the furious: Why your SBIG CCD camera doesn’t have USB 4.0

There are lots of marketing claims about fast camera download speeds and ever-faster interfaces. It makes you wonder why your SBIG CCD camera doesn’t require a super-fast interface that races along the data highway into your computer. Why is this? It’s really two simple reasons:   Cable Length Sensor Readout Rate In Part I of this blog, we’ll explore...

Our COVID-19 Protective Measures

Our COVID-19 Protective Measures

During these unprecedented circumstances, we at Diffraction Limited are taking all precautions to ensure the health and safety of our employees and customers. We are monitoring the situation closely and making sure all our employees are diligent about their own safety and that of our customers. We have established stringent guidelines to ensure all our...

CCD versus CMOS: Which is Better?

by Doug George. The Charge Coupled Device (known as a CCD) has dominated astronomy and consumer electronics for nearly five decades. That is changing. The Nobel prize winning CCD was invented in 1969 and became a mature technology after about 20 years. CCD cameras gained wide acceptance for still imaging, video, and photometric measurements, replacing the...

Preventing Frost

Preventing Frost

by Doug George. Some people ask, "Why do we use desiccant plugs?" Simply put, they minimize life cycle cost and downtime. The imaging sensor needs to be below freezing in order to control dark current and noise.  If the sensor is exposed to the atmosphere it will quickly be encased in ice. This not only ruins the...

Dragonfly 44 Discovery

The Dragonfly Array consists of two telescope mounts, each carrying 24 ultra high contrast lenses. These off-the-shelf Canon lenses use new nano-fabricated coatings with sub-wavelength structure on the optical glass, which has unprecedented performance in reducing stray light and reflections. On the back of each of these 48 lenses is an SBIG STT-8300M camera. The purpose...

CCD Imaging 101

CCD Imaging 101

Raw CCD images are exceptional but not perfect.  Due to the digital nature of the data many of the imperfections can be compensated for or calibrated out of the final image through digital image processing.  This page contains some basic definitions used in CCD imaging that you will encounter from time to time: Composition of...