Page 2 of 6 FirstFirst 1234 ... LastLast
Results 21 to 40 of 105

Thread: lighting ratios (outdoors)

  1. #21

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by surge View Post
    if its a harsh day...and you get exposure readings like 1/500@f8, 3 stop under will be 1/500@f22!!!

    you can set 1/2000at f11 w strobe but you nee one that can fast sync w you can...e.g sb800 for nikon....set manually at fast sync. thats the only way i guess...can use GND unless your subj is level on one side....defintely not if assuming your subj means ppl
    dun quite understand the underlined sentence.can elaborate?

  2. #22
    Senior Member
    Join Date
    Mar 2004
    Location
    Central West
    Posts
    1,952

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by jeanie View Post
    ok, let me try this:

    meter ambient.
    assuming it's 1/250 at f8
    i set a 3 stop underexp
    so i set to 1/2000 at f8
    i have to set my d200 to allow flash FP enabled.
    then on flash, set to TTL
    fire away.
    correct?


    other than TTL to set on flash, any other things i must input?
    and does FP works on Manual and aperture priority in my d200?
    Yep. No other things you need to input into the flash, FP mode works in M and A mode.
    Another option I forgot to mention is instead of upping your shutter speed you can use an ND filter if your camera/flash doesn't support FP mode and you need to go above your x-sync speed.

  3. #23

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by ExplorerZ View Post
    logically wise it will work, but i haven test it (using d50, doesn't have FEL )
    i think yours is the 'fastest' method given the scenario.

    nvrtheless, i will try all the methods listed here.

  4. #24
    Senior Member
    Join Date
    Jan 2006
    Location
    West Legion
    Posts
    7,751

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by jeanie View Post
    dun quite understand the underlined sentence.can elaborate?
    well, you nv mention what kind of shoot, so i said GND which is used mainly for landscape purpose. but since you are talking about portrait now, guess you can forget about this.

    edit: erm wait, guess something wrong with my previous method. you will have to increase the flash exposure by 3stop before FEL.
    Last edited by ExplorerZ; 4th January 2007 at 10:54 AM.

  5. #25

    Default Re: lighting ratios (outdoors)

    If you are using flash... you play around with the exposure compensation and flash exposure compensation.

    For me I usually use +1 to +2 EV for exposure compensation and -1 to -2 for flash exposure compensation. Play around with the 2 parameter according to the ambient lighting to get a more natural exposure.

    The alternative is go fully manual.

    BC

  6. #26
    Senior Member
    Join Date
    Mar 2004
    Location
    Central West
    Posts
    1,952

    Default Re: lighting ratios (outdoors)

    Doing a flash exposure lock at the ambient meter setting and then adjusting the exposure down 3 stops will not work - it will underexpose the subject as your flash is firing at a power where the ambient light has lit your subject mostly. You need your flash to fire correctly at the final camera exposure.

  7. #27
    Senior Member
    Join Date
    Jan 2006
    Location
    West Legion
    Posts
    7,751

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by gooseberry View Post
    Doing a flash exposure lock at the ambient meter setting and then adjusting the exposure down 3 stops will not work - it will underexpose the subject as your flash is firing at a power where the ambient light has lit your subject mostly. You need your flash to fire correctly at the final camera exposure.
    yup, i forgotten to mention one step which i have just added in my prev post

    so it will be +3FV, FEL and then stop down

  8. #28

    Default Re: lighting ratios (outdoors)

    Best is if you can have external strobe. Then set faster shutter speed to darken background.

  9. #29

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by ExplorerZ View Post
    well, you nv mention what kind of shoot, so i said GND which is used mainly for landscape purpose. but since you are talking about portrait now, guess you can forget about this.

    edit: erm wait, guess something wrong with my previous method. you will have to increase the flash exposure by 3stop before FEL.
    how come?
    if i up 3 stops on flash, then i down 3 stops on ambient,
    in total there will be a 6 stop difference.
    no?

  10. #30
    Senior Member
    Join Date
    Jan 2006
    Location
    West Legion
    Posts
    7,751

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by jeanie View Post
    how come?
    if i up 3 stops on flash, then i down 3 stops on ambient,
    in total there will be a 6 stop difference.
    no?
    +3 for flash is to compensation the -3 camera meter exposure.

  11. #31

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by ExplorerZ View Post
    +3 for flash is to compensation the -3 camera meter exposure.

    aiyo!
    now i beginning to blur liao...

    ok will try.

    btw goose, if i use FP flash on sb800, i remember reading that the flash distance will significantly reduced.

  12. #32
    Senior Member
    Join Date
    Jan 2006
    Location
    West Legion
    Posts
    7,751

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by jeanie View Post

    aiyo!
    now i beginning to blur liao...

    ok will try.

    btw goose, if i use FP flash on sb800, i remember reading that the flash distance will significantly reduced.
    well, to be exact, the +3 compensation of flash is to balance off the -3 ambient exposure, so that your flash will fire enough power when you go from f8>22 (you will need 3 stop more of flash power to get correct exposure on subject)

  13. #33

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by ExplorerZ View Post
    +3 for flash is to compensation the -3 camera meter exposure.
    I thought it should be the other way around. Light that your subject will be bright and your ambient dim.

    BC

  14. #34

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by Scaglietti View Post
    I thought it should be the other way around. Light that your subject will be bright and your ambient dim.

    BC
    think he is answering wrt to my thread requirements cos i stated i wanted a 3 stop underexp for ambient to subject.

    if the other way round, then i would use balance matrix fill flash.
    no?

  15. #35
    Senior Member
    Join Date
    Jan 2006
    Location
    West Legion
    Posts
    7,751

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by Scaglietti View Post
    I thought it should be the other way around. Light that your subject will be bright and your ambient dim.

    BC
    i tot thats why she trying to achieve? overrall balance exposure even if the background is 3stop brighter?

    maybe i should state the whole thing again.
    +3 flash, meter on the subject, FEL, -3 exposure (f8 > 22), fire. and maybe a little of fine tune.

  16. #36

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by jeanie View Post
    think he is answering wrt to my thread requirements cos i stated i wanted a 3 stop underexp for ambient to subject.

    if the other way round, then i would use balance matrix fill flash.
    no?
    Ok ok... now I see why...

    So you problem is that you have a extremely bring background and you try to fill you subject using a flash.

    When you use a fill flash, the flash will usually just illuminate the subject and not the background. The balance fill-in programme in your SB-800 will normal do the job very well in the TTL/BL mode.

    It is very unlikely that you use the flash and still have the background +3EV overexposed unless you have having a extremely bright background and a super weak flash. (For theoretical discussion, ExplorerZ is right, but practically that should not happen.)

    When flash is used, the tendancy is that you have a very bright subject and a dim background which looks unnatural. You will normally need to do some exposure compensation to get the balance between the subject and background. Usually you do a +ve exposure compensation and a -ve flash exposure compensation.

    I have yet to encounter a situation when I use flash and I do exposure compensation the other way around.

    BC

  17. #37
    Senior Member
    Join Date
    Jan 2006
    Location
    West Legion
    Posts
    7,751

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by Scaglietti View Post
    Ok ok... now I see why...

    So you problem is that you have a extremely bring background and you try to fill you subject using a flash.

    When you use a fill flash, the flash will usually just illuminate the subject and not the background. The balance fill-in programme in your SB-800 will normal do the job very well in the TTL/BL mode.

    It is very unlikely that you use the flash and still have the background +3EV overexposed unless you have having a extremely bright background and a super weak flash. (For theoretical discussion, ExplorerZ is right, but practically that should not happen.)

    When flash is used, the tendancy is that you have a very bright subject and a dim background which looks unnatural. You will normally need to do some exposure compensation to get the balance between the subject and background. Usually you do a +ve exposure compensation and a -ve flash exposure compensation.

    I have yet to encounter a situation when I use flash and I do exposure compensation the other way around.

    BC
    I guess she is shooting someone against bright sky which most of the time are completely blown.

  18. #38
    Member
    Join Date
    Mar 2002
    Location
    north
    Posts
    1,310

    Default Re: lighting ratios (outdoors)

    Quote Originally Posted by jeanie View Post
    dun quite understand the underlined sentence.can elaborate?
    GND can only be used to balance exposure of landscape of foreground/background adn the grad cut off at the horizon.

    if you wanna underexpose ambient. meter for ambient at -3 stops, go for shutter priority at 1/250( D200 case) adn use flash to illuminate the subject.

    but chances is the f stop w be near f22 n flash will have to fire real hard to get decent light.

    the other way is to shoot at like 6 plus...light not so harsh and easily to obtain flash sync.

    maybe you can explain wat you are trying to do...why wanna underespore background 3 stops...like a lot le

  19. #39

    Default Re: lighting ratios (outdoors)

    if you guys can, take a good read at this book by daniel lezano and bjorn thomassen

    100 WAYS TO TAKE BETTER PORTRAIT PHOTOGRAPHS

    on page 58, he mentioned a technique call keyshifting

    he only mentioned a 3 stop compensation for background vs subject.but to a noob like me, i'm juggling in my mind how and WHAT to set on my flash and camera.

    man...i'm almost done reading all the photography books bought from kinokuniya.

  20. #40
    Senior Member
    Join Date
    Mar 2004
    Location
    Central West
    Posts
    1,952

    Default Re: lighting ratios (outdoors)

    As mentioned earlier, simple and easy way to achieve it is

    Set your flash to standard TTL.
    If you are in A mode on your camera, dial in -3eV exposure compensation on the camera (this will increase your shutter speed - you may need to go into FP mode if the shutter speed goes above your x-sync speed). If you are in M mode, adjust your aperture/shutter speed so that the background will be underexposed by 3eV.
    Take the shot.


    Quote Originally Posted by jeanie View Post
    btw goose, if i use FP flash on sb800, i remember reading that the flash distance will significantly reduced.
    Yes, the main disadvantage of FP mode is the flash power is reduced to approx. 1/8 power.

Page 2 of 6 FirstFirst 1234 ... LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •