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Thread: Camera's Functions

  1. #61

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    Originally posted by Flare
    Long exposure is very slow shutter speed, and allows more light to enter... perhaps of a few seconds... The aperture settings will depends... if you are shooting say boat quay at night... due to the little amount of light available, you may need both a slow shutter and a wide aperture to gather sufficient light. Especially if there's limitation due tothe camera. Say your camera's longest shutter is 4 seconds, but at 4 seconds with a small aperture, you still cannot correctly expose the shot, you may need to use a wider aperture along with a 4 second aperture to achieve the correct exposure.
    oh ok, got it thanx

    For digital zoom, the more enlargement you make, the poorer the end quality. Since digital enlargement uses what information available to create the extra pixels, the more extra information creat the poorer the quality... Let's say you have 1 pixel, and do a 2x digital enlargement, from 1 pixel, you make 4 more (2x the width and 2x the length)... if you make a 10x enlargement... you are making up 100 pixels (10 by 10) from 1 pixel... so say the pixel is green, you just make 100 pixels of green... so the image may be larger... it'll look ugly... compared to a smaller picture...
    I know that. What I'm refering to is how to do a digital zoom? If it's what I'm stating just now, then the number of x digital zoom on those cameras would be useless right?

  2. #62

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    Originally posted by revenant



    I know that. What I'm refering to is how to do a digital zoom? If it's what I'm stating just now, then the number of x digital zoom on those cameras would be useless right?
    Not say useless but not important. Sometimes I feel they use it as a marketing ploy to con people. What is impt is the optical zoom.

  3. #63

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    Originally posted by copland


    Not say useless but not important. Sometimes I feel they use it as a marketing ploy to con people. What is impt is the optical zoom.
    sheesh.... might as well advertise A101 as 10x digital zoom....

  4. #64
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    Correct.... But I find my digital zoom useful sometimes... Like at JBP the other day... When using my 2x digital zoom, my camera meter and focuses using a smaller area... give me more accurate metering. =)

  5. #65

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    Originally posted by Flare
    Correct.... But I find my digital zoom useful sometimes... Like at JBP the other day... When using my 2x digital zoom, my camera meter and focuses using a smaller area... give me more accurate metering. =)
    how you use the digital zoom?

  6. #66

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    Just one thing to take note when doing long exposure shot. Digital cameras suffers from long exposure noise. While some did a good job at eliminating such noise, the same cannot be said for consumer digicams. Probably that's why some of these cams limit their shutter speeds to 1 second

    Regards,
    JK

  7. #67

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    Originally posted by tanjk
    Just one thing to take note when doing long exposure shot. Digital cameras suffers from long exposure noise. While some did a good job at eliminating such noise, the same cannot be said for consumer digicams. Probably that's why some of these cams limit their shutter speeds to 1 second

    Regards,
    JK
    thanx for that

  8. #68
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    Originally posted by revenant


    how you use the digital zoom?
    For me, I have a button which switches on my 2x digital zoom. When I switch it on, the camera only use the center half of the CCD to take the picture, focus and meter... so if the subject I want can only be reached with my digital zoom, I switch it on and the camera meters the subject i'm interested in and is not bothered by the stuff outside, which results in better metering... of course I can do the exposure compensation manually... But when shooting things that moves, like birds, I don't have the luxary of time... Never used by digital zoom until my JBP trip... found the metering more accurate, especially those of my flash shots...

  9. #69

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    Originally posted by Flare


    For me, I have a button which switches on my 2x digital zoom. When I switch it on, the camera only use the center half of the CCD to take the picture, focus and meter... so if the subject I want can only be reached with my digital zoom, I switch it on and the camera meters the subject i'm interested in and is not bothered by the stuff outside, which results in better metering... of course I can do the exposure compensation manually... But when shooting things that moves, like birds, I don't have the luxary of time... Never used by digital zoom until my JBP trip... found the metering more accurate, especially those of my flash shots...
    oh ok. Do you mean different cameras have different digital zoom "capability" ?

  10. #70
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    correct... it depends on the design of the camera... 2x and 3x are more common tho.

  11. #71

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    Originally posted by Flare
    correct... it depends on the design of the camera... 2x and 3x are more common tho.
    oh ok

    err.... I think I made up my mind already. I'll start off with a "low-end" digicam first. If ever in the future I'm attracted strongly by digital photography, I'll get a better one

    Right now, some of the digicams on my list are the

    Fuji A101
    Canon A10 / A20

    Hopefully someone would want to let go his/her, I'll get it
    Last edited by revenant; 15th April 2002 at 10:12 PM.

  12. #72
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    Hee Hee... try the buy and sell subforum...

  13. #73

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    Originally posted by Flare
    Hee Hee... try the buy and sell subforum...
    I frequent there every now and then.

  14. #74

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    Guys, can I know how / what's the use of this modes?

    Manual ( manually set the aperture, shutter speed etc? )
    Shutter Priority ( read up a bit about it but don't really understands )
    Aperture Priority ( read up a bit about it but don't really understands )
    Program ( Totally don't know )

  15. #75

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    Originally posted by revenant
    Guys, can I know how / what's the use of this modes?

    Manual ( manually set the aperture, shutter speed etc? )
    Shutter Priority ( read up a bit about it but don't really understands )
    Aperture Priority ( read up a bit about it but don't really understands )
    Program ( Totally don't know )
    manual - you set shutter speed and aperture
    shutter priority - you set shutter speed, camera decides on aperture
    aperture priority - you set aperture, camera decides on shutter speed
    program - camera decides on aperture and shutter speed, but you can adjust exposure compensation etc.

  16. #76

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    Originally posted by Tweek


    manual - you set shutter speed and aperture
    shutter priority - you set shutter speed, camera decides on aperture
    aperture priority - you set aperture, camera decides on shutter speed
    program - camera decides on aperture and shutter speed, but you can adjust exposure compensation etc.
    thanx.

    oh ya, what's exposure compensation? those -1 , 0, +1

  17. #77
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    When do you use them:

    shutter priority - motion is the prime concern. You use fast shutter speed to freeze motions and slow shutter speed to blur them.

    aperture priority - controlling of depth-of-field (DOF), or how blur the background is. Larger aperture (small f-value, eg. f/2.8) makes the background more blur then smaller aperture (large f-value, eg. f/16). Other factors that also affect DOF: lens to object distance, focal length of the lens, object to background distance.

    program - use this mode when you are not too concern about the above or want a quick snap, e.g. flash photography, landscape, street shooting, etc.

    manual - when you want to deviate from the cemera's exposure meter, eg. learning basics of exposure control, or taking night scenes.
    Last edited by ziploc; 16th April 2002 at 03:10 PM.

  18. #78

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    Originally posted by ziploc
    When do you use them:

    shutter priority - motion is the prime concern. You use fast shutter speed to freeze motions and slow shutter speed to blur them.

    aperture priority - controlling of depth-of-field (DOF), or how blur the background is. Larger aperture (small f-value, eg. f/2.8) makes the background more blur then smaller aperture (large f-value, eg. f/16). Other factors that also affect DOF: lens to object distance, focal length of the lens, object to background distance.

    program - use this mode when you are not too concern about the above or want a quick snap, e.g. flash photography, landscape, street shooting, etc.

    manual - when you want to deviate from the cemera's exposure meter, eg. learning basics of exposure control, or taking night scenes.
    thanx for the clear explaination

  19. #79

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    Originally posted by revenant

    So the aperture settings is mainly for blurring effect? Smaller f-stop, bigger hole blur background. Bigger f-stop, smaller hole, blur foreground. What if I want the photo to be normal? Both foreground and background to be sharp, use the "middle" f-stop?

    Just to correct something from an earlier post.
    The aperture setting can be imagined as the sharpness of the background.
    If a small aperture (larger f-stop like f/22) is used, the background will be sharper than using a wide apertude (small f-stop like f/2.8).

    Smaller aperture (hole) or larger f-stop like f/2.8 do not just give a blur foreground (subjects in front of the subject in focus).

    To make as much foreground and background be in focus, a small aperture (hole) or larger f-stop like f/22 is used.


  20. #80

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    Originally posted by Bean


    Smaller aperture (hole) or larger f-stop like f/2.8 do not just give a blur foreground (subjects in front of the subject in focus).

    Correction! Larger f-stop is not f/2.8

    Anyway, thanx for ur help

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