What aberration causes the common "cross pattern" in astronomy images?
96397
Optical explanation of images of stars?
87931
Sign convention for mirror and lens formulas
47620
How does a circular lens produce rectangular shots?
34411
What lens characteristics are important in star photography?
107125
Why is an image formed when two light rays coming from an object intercept?
74363
Why is the bokeh shaped like the aperture?
78324
What causes the shadow at the bottom of this photograph?
112497
Unwanted patterns in texture from repeated, seamless image
44845
Glass reflection distortion
145425
Are double-slit patterns really due to wave-like interference?
149944
How can I mitigate edge halo when darkening skies in post-processing?
86796
Why do waves diffract?
17488
Why is FF sharper than crop body for the same framing of the same object?
147537
Detecting an ellipse in a glaucoma photo
156217
What causes this 'bokeh crop' effect?
129737
How do I achieve this kind of light star effect?
48739
Ortho Projection produces artifacts