To Blur and Freeze

Discussion in 'Beyond the Basics' started by khushi2004, Apr 10, 2004.

  1. khushi2004

    khushi2004 TPF Noob!

    Joined:
    Mar 12, 2004
    Messages:
    28
    Likes Received:
    0
    Hi,
    I want to take some shots to get blur picture and freeze the moving subject in sunny day. Okay i hv basic knowledge like to blur i need lower shutter speed like 1/15, 1/8.
    and to freeze the picture i have to use higher shutter speed like 1/1000, 1/2000.
    But in this both case i not sure what will be my correct aperture. And one more thing i hv aperture priority camera and i am setting my shutter speed by changing my film speed.

    For example: i am taking my picture at f11 @ 1/500 this is my correct exposure now i want to blur the picture if i reduce my shutter speed to lower one it doesn't affect my picture.

    I don;t want to get my picture overexposed while trying to take blur picture.
    regards!
     
  2. khushi2004

    khushi2004 TPF Noob!

    Joined:
    Mar 12, 2004
    Messages:
    28
    Likes Received:
    0
    Hi guys is there any useful link based on my question!
     
  3. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

    Joined:
    Aug 25, 2003
    Messages:
    7,021
    Likes Received:
    34
    Location:
    Lawrence, KS
    Can others edit my Photos:
    Photos NOT OK to edit
    What kind of camera are you using? And does it also have shutter priority mode?

    You probably shouldn't be adjusting film speed to get the camera to change settings, as that will over or under expose.

    If you have a starting point, such as f/11 @ 1/500th, that you know is the correct exposure, then as you adjust one setting (either shutter or apeture), you adjust the other in the opposite direction to maintain the same exposure.

    If f/11 @ 1/500th is correct exposure, then all of the following give the same exposure, although obviously different aspects of the image will be changed (DOF, blur/freeze, etc...)

    f/2.8 @ 1/8000th
    f/4 @ 1/4000th
    f/5.6 @ 1/2000th
    f/8 @ 1/1000th
    f/11 @ 1/500th
    f/16 @ 1/250th
    f/22 @ 1/125th

    As one setting is adjusted to allow more light, the other must be adjusted to reduce light in order to maintain the saem exposure as you started out with.

    Check out the FAQ post at the top of this forum.
     
  4. Goofup

    Goofup TPF Noob!

    Joined:
    Feb 21, 2004
    Messages:
    141
    Likes Received:
    0
    Location:
    Middle of Oklahoma
    Can others edit my Photos:
    Photos OK to edit
    An even simpler way to look at it:
    1) don't adjust the film speed to achieve a result unless you absolutely have to.

    2) Using aperture priority is fine- all you have to do is adjust the aperture and the camera will find the correct shutter speed for you automatically! (Basically, the more open the lens, the faster the shutter speed and vice versa.)
     
  5. e_

    e_ TPF Noob!

    Joined:
    Jun 20, 2003
    Messages:
    177
    Likes Received:
    0
    Location:
    ...... itinerant ..........
     

    Hi guys!

    Great to see everything's cranking along @ TPF

    I had some down time and was just passing through - thought to throw in my tuppence worth for this question

    Ksmattfish explains it well but the shutter speeds (even with the aperture closed down) remain problematic

    Several suggestions:

    * Use a slower film

    * Use a filter

    * Experiment with lowering the ISO setting on camera; modern negative film should be able to handle up to 3 stops (without any change to development times¹) and still give an acceptable result

    * To achieve blur with a 'faster' shutter speed - position yourself so that moving object travels at right angles to/across the face of your lens

    Failing that (and having noted your wish to shoot on a sunny day) it may be necessary to wait for less light

    Have fun!

    :)

    è_

    EDIT: (¹)
     
  6. photobug

    photobug TPF Noob!

    Joined:
    Apr 19, 2003
    Messages:
    1,562
    Likes Received:
    4
    Location:
    Pasco, WA
    Hey stranger! How goes the world of photojournalism? :)
     
  7. e_

    e_ TPF Noob!

    Joined:
    Jun 20, 2003
    Messages:
    177
    Likes Received:
    0
    Location:
    ...... itinerant ..........
     
    Jim!

    ... it's nice to be remembered, my friend. Thank you

    Life is good - and work is busy

    Just taking an Easter break / some gentle R 'n R

    Cheers!

    :D

    è_
     
  8. khushi2004

    khushi2004 TPF Noob!

    Joined:
    Mar 12, 2004
    Messages:
    28
    Likes Received:
    0
    My camera is aperture priority i can not set my shutter speed only aperture.
    Okay i tried to take some shots (running person) to get blur picture, i took some shots at f11 @1/500 (ASA 400) for correct reading and i want to test to get blur picture by reducing shutter speed to 1/8. But if i do it by film speed setting like:

    I trying to reduce my shutter speed by changing film speed to get 1/8
    f11@1/500 (ASA 400 what i using)
    f11@1/250 (ASA 200)
    f11@1/125 (ASA 100)
    f11@1/60 (ASA 50)
    f11@1/30 (ASA 25)

    But i don; t have film speed setting below than 25 so as one expert have given me some clue that changing aperture we can make same exposure like f11@1/500 will be same as f22@1/125.
    If i change my exposure setting to f22@1/125 i can reach upto 1/8 so is it correct method to do.
    And what sort of things i hv to take care while making picture blur.
     
  9. khushi2004

    khushi2004 TPF Noob!

    Joined:
    Mar 12, 2004
    Messages:
    28
    Likes Received:
    0
    so i f i take picture
    AT
    so if i change my aperture to f22 i can get 1/15 by reducing film speed to ASA 25.
    But it will definitly harm my picture, coz i don;t hv shutter priority!
     
  10. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

    Joined:
    Aug 25, 2003
    Messages:
    7,021
    Likes Received:
    34
    Location:
    Lawrence, KS
    Can others edit my Photos:
    Photos NOT OK to edit
    We can help you better if you could tell us the brand/style of camera you are using. Is it film? Digital? Etc....
     
  11. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

    Joined:
    Dec 16, 2003
    Messages:
    33,817
    Likes Received:
    1,811
    Location:
    Edmonton
    Can others edit my Photos:
    Photos NOT OK to edit
    If you take a photo with 400 ISO film, with the camera set for 25 iso...your photos will be 4 stops over exposed. Rather than just change the camera setting, change the film. Even if you use ISO 100 film, shooting at 25 will be closer to getting the right exposure.

    You could use a filter or two to cut the light and get a proper exposure at slower shutter speeds.

    Maybe you are trying to get shots where the moving subject has motion blur but actually appears sharp. This is done by using slow shutter speeds and a flash. The slow shutter give the blur and the flash freezes the action. Now the catch is that your camera/flash has to have the "2nd curtain sync" option. Otherwise the flash will fire at the start of the long exposure and you will get a sharp subject with motion blur in front rather than behind.
     
  12. khushi2004

    khushi2004 TPF Noob!

    Joined:
    Mar 12, 2004
    Messages:
    28
    Likes Received:
    0
    I hv aperture priority camera Canon AV1
    and using film 400 ISO .
     

Share This Page