I have a RAW photo in aperture that has quite a lot of noise. When I export the photo to JPEG (and TIFF/PSD, 16 bit) I get a strange square grid like pattern on the photo. Here is an example of the ...
I've noticed that in a number of photos I've taken with a small depth of field due to wide aperture and a fairly close subject, I get a rather pleasing but not entirely explicable diffuse shadow ...
How can you control the size of "starbursts" from light sources in photographs? For example, the lights on the shore in this photo have very sharp and long starbusts: ...