Serene Life

by garik

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990 reputation
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visits member for 1 year, 9 months
seen 2 days ago

Oct
21
comment Why is it called ISO “speed”?
Equivalently, lenses can be "fast" or "slow" corresponding to their maximum aperture.
Sep
28
answered Why has my camera stopped taking pictures in low light?
Sep
28
comment is there auto-exposure adjustment button in M mode on Sony A7?
In M mode, your camera should still give you a meter reading, so even if there's no special button for that, you could manually adjust the shutter/aperture to match what the camera tells you.
Sep
7
comment Can studio light be as good as sunlight?
Yes, sunlight is blackbody radiation and has a nice continuous spectral distribution. But so do incandescent/halogen bulbs! Fluorescent lamps and "white" led bulbs do have discrete spectra which can be a problem with regard to faithful reproduction of colors, so it certainly helps to pay attention to what sort of lamps you choose when creating your lighting setup.
Sep
7
comment Can studio light be as good as sunlight?
I'd say the best source of light is whatever allows you to get the photo you want! Daylight is notoriously tricky, and direct sunlight is almost always way too harsh to be useful for portraits, for example.
Aug
20
comment Why the faces in the corner tends to skew a bit in almost all smartphone cameras
I think the skew @Java_User means is actually caused by rectilinearity itself - the corners are "stretched" in a wide angle view, and any barrel distortion in this case would actually help undistort the shapes somewhat! (Specifically, it would help preserve areas and angles at the expense of distorting straight lines.)
Aug
18
comment Techniques to make images with dark background 'pop'
Instead of Photoshop, if you can influence the web page styling, you can use CSS box-shadow (just use a bright color to get a glow instead of a shadow).
Aug
18
comment Techniques to make images with dark background 'pop'
Usually a dark background makes photos pop more when viewed on a backlit screen - if not that might be a sign that your photos are underexposed?
Aug
13
answered Is the distance scale on a lens linear?
Aug
12
comment Is the distance scale on a lens linear?
The scale is hyperbolic - it maps the bounded range of distance scale positions onto the infinite range of focus distances [mfd, ∞] where mfd is the minimum focus distance. Unfortunately I'm too tired right now to figure out the math to calculate the distance scale position corresponding to an arbitrary focus distance :/
Aug
12
comment Is there an “optimal” background distance when striving for a minimally distracting background?
Yeah, I suppose this was more of an exercise in thinking aloud (and not quite thinking through) than a "proper" question from my part. Still, the answer and comments were helpful, thank you, and sorry about the delay in accepting!
Aug
12
accepted Is there an “optimal” background distance when striving for a minimally distracting background?
Aug
12
comment Astrophotography with an 800mm
And Jupiter! Its angular diameter is always greater than Mars's, and on average greater than Venus's. It's also fairly easy to resolve the Galilean moons as points of light around Jupiter.
Aug
12
comment What is the reason of “banded” bokeh on Sony a7?
I'm pretty sure it's just those lenses - it's hard to see how the camera body would affect the bokeh rendition in any obvious manner.
Aug
8
comment Star photography
@SelimArikan Sure, I just meant the way the house is blurred.
Aug
7
comment Star photography
Yeah, the 1:1 image makes it clear that camera movement is the culprit, good point!
Aug
7
comment Star photography
@Pat: Then it is most probably camera vibration that caused the blurriness. Some IS implementations may actually cause feedback loops blurring the picture when on a tripod - that should not be a problem with modern lenses but just to be safe, it is usually recommended to disable stabilization when using a tripod.
Aug
7
answered Star photography
Aug
1
asked Is there an “optimal” background distance when striving for a minimally distracting background?
Jul
30
revised Camera bodies with a EF-S mount
deleted 2 characters in body; added 7 characters in body