Matching Your Camera to Your Optics
by Douglas George In order to get the best results from your equipment, it is important to match the resolution of your camera to the resolution of your optics. In conventional photography your lenses are highly adaptable, with adjustable f/ratio and often zoom capability (adjustable focal length). On dedicated science instruments such as telescopes and microscopes...
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...
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
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...
