New answers tagged photography
8
From the first article you linked:
Taking the first 3,200-megapixel images of a variety of objects, including a head of Romanesco – a type of broccoli – that was chosen for its very detailed surface structure, was one of these tests. To do so without a fully assembled camera, the SLAC team used a 150-micron pinhole to project images onto the focal plane.
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8
I agree that it’s noise in a fixed pattern, but I think it’s unlikely to be related to ADC sensitivity. Typically if you have multiple ADCs, they read out blocks of the sensor (e.g. one on each corner to read out a quadrant). And sensitivity differences across those amplifiers usually is removed pretty well by flat-fielding.
In my experience, you get things ...
6
That looks like a fixed-pattern noise to me.
Fixed pattern noise is a common sensor artefact for CCD sensors, One source for this is where you have less analog - digital converters (ADC) than pixels. Say, you have N ADC, each with its own sensitivity. Then you have in the resulting image a sensitivity pattern which repeats every N pixels. Depending on ...
3
Based on how you described your situation, I surmised that you do not have prior experience or equipment for astrophotography through a long focal-length telescope. There are a few things you did not specifically ask, but should know before you invest in an expensive camera. Also, it sounds like you would have preferred a dedicated astrophotography camera -...
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