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Thread: Some entry level Qns

  1. #1

    Default Some entry level Qns

    Read on digital photography about adjusting ISO and shutter speed.

    But how how adjusting 2 affect the turn out of the photo?

    For instance, if you want to change the lighting effect of the picture, you can just change idea the ISO or shutter speed (for sceneries) correct? is there a need to adjust both?

    there's a sentence in it also úse the long end of your zoom for tightly cropped images but keep your eye on the ISO to ensure you're getting fast enough shutter speeds to avoid shake' <-- ISO affects shutter speed?

    and with regards to aperture...

    for having a large aperture or small aperture soften the background?

    could really use some help

  2. #2

    Default Re: Some entry level Qns

    Hi there.

    The higher the ISO, the more your shutter speed will be limited, i.e slower. So in a way, the ISO does affect the shutter speed.

    As for a smaller depth of field ('softer background') would mean a smaller aperture, meaning f/1.8 for instance.

  3. #3

    Default Re: Some entry level Qns

    Quote Originally Posted by Linerax View Post
    Hi there.

    The higher the ISO, the more your shutter speed will be limited, i.e slower. So in a way, the ISO does affect the shutter speed.

    As for a smaller depth of field ('softer background') would mean a smaller aperture, meaning f/1.8 for instance.
    You've made some typo errors

    The higher the ISO, the higher the sensitivity of the sensor and the faster the shutter speed can be.

    A large aperture (small f number) would result in a shallow depth of field (out of focused background [which isn't necessary a bad thing]), and not the other way round.
    Last edited by SeAnCoLd; 13th December 2009 at 09:46 PM. Reason: Typo...
    Sean

  4. #4
    Moderator catchlights's Avatar
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    Default Re: Some entry level Qns

    Quote Originally Posted by Ericulf View Post
    Read on digital photography about adjusting ISO and shutter speed.

    But how how adjusting 2 affect the turn out of the photo?

    For instance, if you want to change the lighting effect of the picture, you can just change idea the ISO or shutter speed (for sceneries) correct? is there a need to adjust both?

    there's a sentence in it also úse the long end of your zoom for tightly cropped images but keep your eye on the ISO to ensure you're getting fast enough shutter speeds to avoid shake' <-- ISO affects shutter speed?

    and with regards to aperture...

    for having a large aperture or small aperture soften the background?

    could really use some help
    read this book, you will have a clearer picture..

    Bryan Peterson: Understanding Exposure

    Shoot to Live, Live to Shoot
    www.benjaminloo.com | iStock portfolio

  5. #5

    Default Re: Some entry level Qns

    Quote Originally Posted by Ericulf View Post
    Read on digital photography about adjusting ISO and shutter speed.

    But how how adjusting 2 affect the turn out of the photo?

    For instance, if you want to change the lighting effect of the picture, you can just change idea the ISO or shutter speed (for sceneries) correct? is there a need to adjust both?

    there's a sentence in it also úse the long end of your zoom for tightly cropped images but keep your eye on the ISO to ensure you're getting fast enough shutter speeds to avoid shake' <-- ISO affects shutter speed?

    and with regards to aperture...

    for having a large aperture or small aperture soften the background?

    could really use some help
    Whether the various settings affect each other depends on the mode you're shooting in.

    In Manual mode, adjusting one setting doesn't afect any other settings. Thats because the camera leaves all decision to you, and not second guess what you want. That's why its called manual mode.

    In modes such as aperture priority or shutter speed priority, u get control over just one setting. Eg. for Shutter speed priority, u get to choose what shutter speed to shoot with, and the camera measures the amount of light (metering) impinging on the sensor through the lens and calculates and sets all other variables (aperture, ISO) to make sure you get a properly exposed picture.

    ISO is basically the sensor's sensitivity to light. The higher the ISO, the more sensitive the sensor is, and the less light is required to provide a proper exposure. Since less light is required with higher ISO, the shutter need to be down for a shorter period of time to allow light to reach the sensor. This would translate to a higher shutter speed.

    Please do consult your manual, and scrutinise it if need be. It's really useful.
    Sean

  6. #6

    Default Re: Some entry level Qns

    Quote Originally Posted by SeAnCoLd View Post
    Whether the various settings affect each other depends on the mode you're shooting in.

    In Manual mode, adjusting one setting doesn't afect any other settings. Thats because the camera leaves all decision to you, and not second guess what you want. That's why its called manual mode.

    In modes such as aperture priority or shutter speed priority, u get control over just one setting. Eg. for Shutter speed priority, u get to choose what shutter speed to shoot with, and the camera measures the amount of light (metering) impinging on the sensor through the lens and calculates and sets all other variables (aperture, ISO) to make sure you get a properly exposed picture.

    ISO is basically the sensor's sensitivity to light. The higher the ISO, the more sensitive the sensor is, and the less light is required to provide a proper exposure. Since less light is required with higher ISO, the shutter need to be down for a shorter period of time to allow light to reach the sensor. This would translate to a higher shutter speed.

    Please do consult your manual, and scrutinise it if need be. It's really useful.
    yeap. so do you all usually adjust both? or just one factor only? since slower shutter speed will allow more light to enter, hence ISO can be ignored. or using higher ISO so that higher shutter speed can be used?

    Quote Originally Posted by SeAnCoLd View Post
    You've made some typo errors

    The higher the ISO, the higher the sensitivity of the sensor and the faster the shutter speed can be.

    A large aperture (small f number) would result in a shallow depth of field (out of focused background [which isn't necessary a bad thing]), and not the other way round.
    that's what i know also. but i just borrowed issue 84 of digital photography. pg 61 says that úse a small aperture to keep the background in focus'

  7. #7

    Default Re: Some entry level Qns

    Quote Originally Posted by SeAnCoLd View Post
    You've made some typo errors

    The higher the ISO, the higher the sensitivity of the sensor and the faster the shutter speed can be.

    A large aperture (small f number) would result in a shallow depth of field (out of focused background [which isn't necessary a bad thing]), and not the other way round.
    My bad, I'm just starting out on photography too, and that was what I thought until I saw your post.

    Sorry for the mistake there.

    Quote Originally Posted by Ericulf View Post
    that's what i know also. but i just borrowed issue 84 of digital photography. pg 61 says that úse a small aperture to keep the background in focus'
    A smaller aperture would mean a larger f number (hope I didn't get it wrong this time), meaning that it has a greater depth of field, allowing a bigger area of the photo to be in focus.

  8. #8

    Default Re: Some entry level Qns

    Quote Originally Posted by Linerax View Post

    A smaller aperture would mean a larger f number (hope I didn't get it wrong this time), meaning that it has a greater depth of field, allowing a bigger area of the photo to be in focus.

    oh... i GET IT!

    seems like i just confused myself

  9. #9

    Default Re: Some entry level Qns

    Quote Originally Posted by Ericulf View Post
    yeap. so do you all usually adjust both? or just one factor only? since slower shutter speed will allow more light to enter, hence ISO can be ignored. or using higher ISO so that higher shutter speed can be used?

    I like to control and fix an ISO value myself, since high ISO results in more noise.


    that's what i know also. but i just borrowed issue 84 of digital photography. pg 61 says that úse a small aperture to keep the background in focus'

    there is nothing wrong with that sentence. Read up on f values and aperture in your manual. You'll understand that sentence better.
    Please see above comments in red.
    Sean

  10. #10

    Default Re: Some entry level Qns

    Quote Originally Posted by SeAnCoLd View Post
    Please see above comments in red.
    yeap. the aperture thing i just confused myself. i related wrongly.

    but for the ISO thing, what i experiment is that for eg. taking photograph with the sun behind the subject, causing the subject to become a silhouette figure, which is not my intention. hence i tried maxing out ISO, compensation, shutter speed but the photo still turns out black. .: using flash would show the image but it would make it stand out alot and hence the photo turns unnatural. is there a way to counter it?

    sorry for the numerous qns ><

  11. #11

  12. #12
    Moderator daredevil123's Avatar
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    Default Re: Some entry level Qns

    Quote Originally Posted by Ericulf View Post
    yeap. the aperture thing i just confused myself. i related wrongly.

    but for the ISO thing, what i experiment is that for eg. taking photograph with the sun behind the subject, causing the subject to become a silhouette figure, which is not my intention. hence i tried maxing out ISO, compensation, shutter speed but the photo still turns out black. .: using flash would show the image but it would make it stand out alot and hence the photo turns unnatural. is there a way to counter it?

    sorry for the numerous qns ><
    In your situation, changing the ISO will not help. The bright background will trick the camera into thinking that the picture is too bright, therefore adjusting the exposure to suit the bright background, causing the subject to be underexposed. In this situation, if you do not want to use flash, use spot metering on the subject's face. But note by doing this, you will get overexposure in the background.

    The other way is to use flash. If using a flash gun, set BL mode on.
    Last edited by daredevil123; 13th December 2009 at 10:52 PM.

  13. #13
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    Default Re: Some entry level Qns

    If you want to, then why not

    What are you shooting?
    Handheld or tripod?
    How much motion blur can you accept?
    How much noise can you accept?
    How much depth of field do you need?

    Answering those questions will help you get the settings for your ISO, shutter speed and aperture.

  14. #14

    Default Re: Some entry level Qns

    Quote Originally Posted by Ericulf View Post
    yeap. the aperture thing i just confused myself. i related wrongly.

    but for the ISO thing, what i experiment is that for eg. taking photograph with the sun behind the subject, causing the subject to become a silhouette figure, which is not my intention. hence i tried maxing out ISO, compensation, shutter speed but the photo still turns out black. .: using flash would show the image but it would make it stand out alot and hence the photo turns unnatural. is there a way to counter it?

    sorry for the numerous qns ><
    are you sure you tweaked the shutter speed? slowing down the shutter speed (using the same aperture) will brighten your subject (at the expense of overexposing your background) because it lets in more light..btw you can adjust your flash compensation, set it to negative compensation so it fires a weak flash
    Last edited by gimumancer; 13th December 2009 at 11:51 PM.

  15. #15

    Default Re: Some entry level Qns

    1. Read your manual. It's explained.
    2. Read the Stickes in the Newbies section about the photography basics for newbies.
    Alpha

  16. #16
    Senior Member limwhow's Avatar
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    Default Re: Some entry level Qns

    Quote Originally Posted by Linerax View Post
    My bad, I'm just starting out on photography too, and that was what I thought until I saw your post.

    Sorry for the mistake there.


    A smaller aperture would mean a larger f number (hope I didn't get it wrong this time), meaning that it has a greater depth of field, allowing a bigger area of the photo to be in focus.
    Hi, Linerax. I take my hat off to you for admitting your mistake. I find this an uncommon virtue on the forum, because it takes courage.
    Never mind being new. Never mind asking apparently 'silly' questions. There will always be experienced members who will, in their own fashion & style, point out a path for you to search for the answer.
    Good for you!

  17. #17
    Senior Member limwhow's Avatar
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    Default Re: Some entry level Qns

    Quote Originally Posted by Ericulf View Post
    yeap. the aperture thing i just confused myself. i related wrongly.

    but for the ISO thing, what i experiment is that for eg. taking photograph with the sun behind the subject, causing the subject to become a silhouette figure, which is not my intention. hence i tried maxing out ISO, compensation, shutter speed but the photo still turns out black. .: using flash would show the image but it would make it stand out alot and hence the photo turns unnatural. is there a way to counter it?

    sorry for the numerous qns ><
    Ericulf, bro Daredevil123 has given a great answer to this scenario of yours.
    Anyway, my post here is just to give you the encouragement to keep reading and asking.
    No worries being new.
    Sometimes our thought process gets stuck somewhere... and we just need that little pointer to nudge us onto the correct direction.

  18. #18

    Default Re: Some entry level Qns

    Thanks for the pointers! ^^

  19. #19
    Senior Member ZerocoolAstra's Avatar
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    Default Re: Some entry level Qns

    Quote Originally Posted by Ericulf
    yeap. the aperture thing i just confused myself. i related wrongly.

    but for the ISO thing, what i experiment is that for eg. taking photograph with the sun behind the subject, causing the subject to become a silhouette figure, which is not my intention. hence i tried maxing out ISO, compensation, shutter speed but the photo still turns out black. .: using flash would show the image but it would make it stand out alot and hence the photo turns unnatural. is there a way to counter it?

    sorry for the numerous qns ><
    Your situation is one which has a very great difference between the brightest area of the photo and the darkest.
    The human eyes excel over camera sensors in being able to view a scene such as the one you describe, yet still being able to see detail in both the dark and bright areas.

    With a camera, you'll either have to reduce the brightness of the bright area (quite difficult), or increase the brightness of the dark area (possible with fill-in flash).
    Exploring! :)

  20. #20

    Default Re: Some entry level Qns

    Q4: What is a flattened image?

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