How do I shoot rain drops
Apr 17, 2012 02:33:41 #
All this tells me only one thing, if you drop a camera from far enough up, you are going to need a new camera!
Apr 17, 2012 03:57:15 #
Erv wrote:
Rain has few variables: density, acceleration, surface area are very near constant. Terminal Velocity of large raindrops is about 20 mph, and for a typical raindrops is about 14 mph: http://www.grow.arizona.edu/Grow--GrowResources.php?ResourceId=146 . The terminal velocity is the constant speed attained by a body while falling through a fluid (liquid or gas).
As you can see, the terminal velocity of a body depends on many factors, like the mass of the body, density of the fluid,
density of the body, gravitational acceleration, projected area of the body etc., and is not constant for a particular type of object.
As you can see, the terminal velocity of a body depends on many factors, like the mass of the body, density of the fluid,
density of the body, gravitational acceleration, projected area of the body etc., and is not constant for a particular type of object.
Both are quite manageable to freeze photographically.
Apr 17, 2012 05:44:55 #
Pablo8
Loc: Nottingham UK.
From Physics school days (63 years ago) I seem to remember the formula 32 feet per second per second Rate of acceleration of a falling object. Of course, that is in the UK, over in the USA, it might be different.
Apr 17, 2012 05:52:54 #
Apr 17, 2012 05:59:22 #
[quote=tramsey]OK, when it comes again flash it is and a very high shutter speed.
Yes, when I was teaching a science class to my third graders I remember an object's highest velocity is 120 MPH. If I would've remember that I would've used a higher shutter speed. But you know, would've, could've and should'ves don't count, not even in photography/
Thanks much for the tip.
t[/quo
When you use the flash, I use a fraction of the full power because at 1/16th the power the flash is like 1/25,000 sec. (something on thjat order)
Yes, when I was teaching a science class to my third graders I remember an object's highest velocity is 120 MPH. If I would've remember that I would've used a higher shutter speed. But you know, would've, could've and should'ves don't count, not even in photography/
Thanks much for the tip.
t[/quo
When you use the flash, I use a fraction of the full power because at 1/16th the power the flash is like 1/25,000 sec. (something on thjat order)
Apr 17, 2012 06:35:35 #
Don't forget to set your focus manually or the camera will focus on something in the background. I'm not sure this matters but I would think you would want the rain drops somewhat in focus as well as frozen in air.
Apr 17, 2012 06:43:00 #
Erv wrote:
I don't think you can raise the shutter speed with the flash. It should stop the drop at 250, I think.;) I was once told that if I shot a bullet straight up, it comes down at 130 mph. Not sure that is right. Guess I have to do some googling.
Erv
Erv
Probably comes down a good deal faster. Depends on "streamlining". The 120/130 mph figure is a ball-park figure for a falling body, and takes wind resistance into account. In the second world war large "blockbuster" bombs would go off target because they wobbled as they went through the sound barrier (somewhere around 650 mph). Problem was solved by off-setting the fins so that the bombs spun as they fell and kept straight. A bullet would tumble as it fell, so would have a lot of wind resistance. I still wouldn't like to be underneath it. In theory it would be doing the same speed when it hit the ground as it was when it left the barrel, provided there was no wind resistance. Don't know about raindrops, but they must have a terminal velocity of their own. I'll stop rambling now...
Apr 17, 2012 07:23:43 #
Erv wrote:
I don't think you can raise the shutter speed with the flash. It should stop the drop at 250, I think.;) I was once told that if I shot a bullet straight up, it comes down at 130 mph. Not sure that is right. Guess I have to do some googling.
Erv
Erv
I think Mythbusters did a show on that bullet thing - no big threat.
Apr 17, 2012 07:42:58 #
I would suspect that some of the problem is the translucy of the drops - little or no contrast for the focus to grab. Next time - maybe shooting at something black will let you capture the drops falling in front of it
Apr 17, 2012 07:44:36 #
Apr 17, 2012 08:21:18 #
Apr 17, 2012 08:25:53 #
ole sarg
Loc: south florida
Seems to me that Galileo dropped two cannon balls of different size and weight from the same height at the same time and they both hit the ground at the same time.
Apr 17, 2012 08:32:57 #
jerryc41 wrote:
I think Mythbusters did a show on that bullet thing - no big threat.
They did, and it wasn't.
Apr 17, 2012 08:42:13 #
Erv wrote:
I don't think you can raise the shutter speed with the flash. It should stop the drop at 250, I think.;) I was once told that if I shot a bullet straight up, it comes down at 130 mph. Not sure that is right. Guess I have to do some googling.
Erv
Erv
You may want to check this out.
http://hypertextbook.com/facts/2007/EvanKaplan.shtml
Apr 17, 2012 08:46:02 #
Just a thought, as I look out at the Scottish April shower lashing my window - could your problem, apart from using as high a shutter speed, that you are not focusing on the rain near you.
Do you use manual or auto focus?
Artistwally
Do you use manual or auto focus?
Artistwally
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