brian]
Cleared for Takeoff
Pretty cool article showing why camera phone pics suck when taken through the prop arc:
http://jasmcole.com/2014/10/12/rolling-shutters/
http://jasmcole.com/2014/10/12/rolling-shutters/
brian];1582390 said:Yea, what EdFred said. A good high speed film on a bright day and a high shutter speed (etc.), you can stop the prop - sometimes...
Most of the time, it is just a dim arc in the air. I have a good DSLR and that is what I get: a dim prop arc which to me is the better pic. (If the prop is stopped, I think the pilot should be at least sweating pretty good.)
By the way, most DSLRs seem to sample the data differently - maybe multiple times. But I'm only a DSLR pilot too - don't ask me too many technical questions there.
For example, here's a shot I took a couple weeks ago with 1/60th of a second shutter speed:
Yeah, DSLRs grab the entire sensor at once. Very different from the little cameras in phones and action cams. A DSLR and an old film camera will behave the same. A high shutter speed will freeze the prop, a low one will result in a pleasant blur.
For example, here's a shot I took a couple weeks ago with 1/60th of a second shutter speed:
What did pictures of a moving propeller look like in the old days with 35mm film? Just blurry? Or could the shutter be fast enough to actually see the blade?
brian];1582379 said:Pretty cool article showing why camera phone pics suck when taken through the prop arc:
http://jasmcole.com/2014/10/12/rolling-shutters/
I'm surprised how sharp that was for 1/60, it's a good shot. My Cannon 7D can get up to 1/8000. I would love to see how that looks.
That article fails to point out that rolling shutter effects only apply to current CMOS camera sensors - while CCD camera sensors use a global shutter, so that effect doesn't occur on them.
So if you want to avoid that issue entirely, just make sure to use a camera with CCD sensors, not CMOS sensors. My Canon camera uses CCD and all my movies with moving props yield only the blur one would expect of a non-zero exposure time.
Ok, so what is the cheapest, compact HD video camera that uses CCD?