Timeline for Black dots appear in photos
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 23, 2017 at 0:07 | vote | accept | user402292 | ||
| Sep 21, 2017 at 22:44 | comment | added | Stan | @dgatwood Your observation fits the argument made by Linwood. The "penumbra" would be the "fall-off" with the darker centre as the shadow itself. | |
| Sep 21, 2017 at 22:40 | comment | added | Stan | I completely agree with you… but I notice that there are many more dots than user402292 circled. Although their distribution is irregular, their size, shape, and density are remarkably similar, nearly identical. Dust particles tend to be irregular depending on their source—animal, vegetable, mineral. Wouldn't you agree? | |
| Sep 21, 2017 at 22:38 | comment | added | dgatwood | What I'm seeing in that photo doesn't look particularly sharp. Each dot has a dark center and a large bleed area where the darkness tapers off, and doesn't fully block the light even in the center. It looks a lot like water spots or something. | |
| Sep 21, 2017 at 22:23 | comment | added | Linwood | These are pretty tiny, fairly distinct dots. Something near the lens is pretty diffuse. Try it. | |
| Sep 21, 2017 at 22:11 | comment | added | dgatwood | I had a hair stuck on the back of a lens once, and that presented itself as a fairly distinct, roughly-hair-shaped shadow. So I think it could easily be a larger blob of something stuck to the back of the lens that is casting a partial shadow on the sensor. | |
| Sep 21, 2017 at 20:08 | history | answered | Linwood | CC BY-SA 3.0 |