What are people's thoughts on the advantages/disadvantages of the AA filter built into the sensor stack of many DSLR/Mirrorless cameras?
I'm assuming that very good optics are being used, to form tight stars occupying just a few pixels with wide field optics.
With no AA filter, a single exposure will contain a mass of bizarrely coloured stars. The stars only return to their proper colour in a stack of dithered exposures - whether the dithering is intentional or is caused by drift. The advantage is that Bayer Drizzle stacking will give very sharp stars and excellent resolution. But how many dithered exposures are required before we obtain acceptable star colours (clearly it depends on star width, the FWHM)?
With an AA filter, a single exposure has stars that are much more normally coloured and very few dithered exposures are required to give perfect colour. The disadvantage is the slight smearing and loss of resolution caused by the AA filter, even when using Bayer Drizzle stacking. But maybe the sharp resolution can be restored by deconvolution with the impulse response of the AA filter?
I'm very interested in people's thoughts on this and whether or not you consider it an important criterion when selecting a DSLR/Mirrorless camera.
Do you know of any studies or experiments that have been done on this issue?
Edited by sharkmelley, 15 August 2019 - 05:18 AM.