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Photo Gallery and Contests Discuss A response to another photo tip question... in the Multimedia - Audio, Video, Photos and more! forums; i hope this isnt too technical...this is a response to a PM that i received... an image is created by the camera collecting the necessary amount of light to properly ...
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    timned88's Avatar
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    A response to another photo tip question...

    i hope this isnt too technical...this is a response to a PM that i received...


    an image is created by the camera collecting the necessary amount of light to properly expose the scene.

    it is the product of 3 variables, time (shutter speed), aperature (f number), and film speed (iso number).

    there are several ways to ensure that one captures enough light to properly expose the scene. the first is through time. for some of my night shots of attractions, the castle, etc. that is the way i go. i use a compact tripod for this as the shutter speeds are WAY too slow for any camera to hand hold (~2-15 seconds).

    the next way is through a larger aperature (smaller f-number). f 2.8 is one stop wider open than f4, which in turn yields twice as much light. the tradeoff is you lose one stop worth of depth of field (the amount of the photo that is in focus).

    the third way is to increase the ISO (film speed). 200 is one stop faster than 100, and 400 is one stop faster than 200 and thus 4x faster than 100, etc. the tradeoff with digital is the same as with film. whereas faster film was grainer, digital become noiser.

    so, it's really a 3 way equasion to get the proper exposure. as one variable increases or decreases, the other two adjust accordingly. 1 second at f4 at iso 100 is the same exposure as 1/2 second at f2.8 at iso 100. it is also the same as 1/2 second at f4 at iso 200, etc, etc.

    the rule of thumb for being able to handhold a slower exposure is 1/x, where x is the focal length (milimeter). ie. 52 mm where the larger the number the more "zoomed in" you are. generally speaking, the more you zoom in, the less maximum aperature you can get and as such the shutter speed slows down.

    there are three types of blurry photos...ones that just aren't focused right to begin with, ones with motion blur, and ones with camera shake.

    if you are looking to get sharp handheld focused photos without problems, you might be in for a hard time unless you have super steady hands. i, an experienced photographer, do not possess this ability - there are precious few than can hand hold a camera for much more than 1/15 second without problems. (camera shake)

    to get photos of spectromagic, etc. you need enough camera to be able to expose the scene with at least 1/50 - 1/60 second to be able to stop the motion enough to not get motion blur. motion blur occurs when the subject is moving faster than the shutter speed of the camera can stop.

    be sure to visit my disney photo blog...
    http://timdevine-disney.blogspot.com

    tim devine

    Tim Devine, owner of THE MAGIC IN PIXELS.

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    Tim, I just looked at your blog for the first time yesterday and you have some amazing photos! I will be using some of your tips for our WDW trip that is now only 2 weeks away! Thanks so much!

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    trickster is offline Hakuna Matata!!... It means no worries!!
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    I too had a look yesterday - I have svaed your site as one of my favourites now!!

    Your photos are amazing - I'm gonna have to write down a few tips!!
    Rich

    "Most of my life I have done what I wanted to do. I have had fun on the job.
    I have never been able to confine that fun to office hours." ~ Walt Disney

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    timned88's Avatar
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    if you like my blog, be sure to check out my new site

    http://www.themagicinpixels.com

    Tim Devine, owner of THE MAGIC IN PIXELS.

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