Napioa - Wind Origins

Napioa - Wind Origins
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Apr
11
comment Why do light sources appear as stars sometimes?
@Brandon Thank you; that makes it clear where you stand. No point in attempting a constructive dialog then.
Apr
10
comment Why do light sources appear as stars sometimes?
@Brandon Right. So why are you making a big deal about it? Is your objection solely to the use of the word "Fraunhofer"? Or does it have some substance related to an aspect of my explanation? If so, what aspect(s) do you think ought to be modified to make the explanation clearer or more correct?
Apr
10
comment Why do light sources appear as stars sometimes?
@Brandon Your clarification is most welcome, but I'm having trouble squaring it with popular descriptions of Fraunhofer diffraction, such as the one on Wikipedia: "In optics, the Fraunhofer diffraction equation is used to model the diffraction of waves when the diffraction pattern is viewed at a long distance from the diffracting object, and also when it is viewed at the focal plane of an imaging lens." That latter qualification would seem to apply explicitly to an image captured by a camera.
Feb
25
awarded  Nice Answer
Dec
2
awarded  Nice Answer
Sep
11
awarded  Yearling
May
2
awarded  Nice Answer
Sep
30
awarded  Explainer
Sep
11
awarded  Yearling
May
22
comment How can I get the shutter actuation count for Canon EOS 500D/550D?
It looks great, thanks. Alas, it works only on Macs... .
Mar
17
awarded  Nice Answer
Mar
13
awarded  Guru
Jan
11
revised What Windows software can I use to make a large photo collage?
Added links and made the numbers more accurate
Nov
20
comment What happens if I press the film rewind button early?
+1 That's a feature of all manual cameras I have ever used: pressing the rewind button disengages the film advance mechanism, so pulling the lever only resets the shutter, setting you up for a double exposure. At the end of a full pull, the rewind button should re-engage. Thus, after one pull (where you will feel no film tension) you should shoot a dark image (lens cap on, high shutter speed, high f-stop) to avoid a double exposure and then advance the film again (feeling the tension as the film is moved) for the next shot.
Sep
15
awarded  Announcer
Sep
11
awarded  Yearling
Sep
10
comment Is there a linear relationship between shutter speed and speed of subject to freeze motion?
Thanks, @Michael, for expanding on the meaning of personal standards of sharpness. Because many (most?) photographs are rarely framed exactly right, they need cropping, so do not forget to take that into account. (I would love to have your 6000x4000 monitor, by the way. But my collection of monitors is such that there often is a 1:1 relationship between pixels in the cropped area and pixels on the monitors, so the one-pixel-of-blur standard is a meaningful, if somewhat stringent, reference for me.)
Jul
3
awarded  Good Answer
Apr
15
reviewed Close What is the optimal “default” aperture value in AV mode?
Apr
15
reviewed Leave Open Best all round zoom lens for D3100?