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Thread: newbie need help on image sharpness

  1. #1

    Default newbie need help on image sharpness

    hi, i am using EF-S 55-250 to get some flower shots. focus on flower but notice the objects next to it is blur, but further one seems sharp. is there something wrong with the lens ?

    second picture - seems abit soft. any comments ? what can i do to improve sharpness ? thanks for your help



  2. #2
    Senior Member Diavonex's Avatar
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    Default Re: newbie need help on image sharpness

    For tiny flower, use Spot Focusing.

    For a flower that fills the center of frame, use Center Weighted Focusing.

    If picture is soft, you can increase the in-camera Saturation

    Use a tripod if you do not have steady hands.

    Also read up Depth Of Field (DOF)

    Note: Different manufacturer use different names for their focusing system.
    Last edited by Diavonex; 30th June 2010 at 09:19 PM.

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    Moderator ed9119's Avatar
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    Default Re: newbie need help on image sharpness

    you will get movement of subject with the lightest of breezes.... and if you shot this handheld, it doubles the headache

    you need to work on metering as well .... the scene in both images look harsh and over by about 1.5 stops

    best of luck !
    shaddap and just shoot .... up close
    Walkeast

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    Default Re: newbie need help on image sharpness

    You need to understand also the relation between the aperture you are shooting at and it's result on the depth of field. Shooting at a large aperture at a long focal length will make it hard for you to keep everything in focus, and that might answer why you see that the objects next to the flower aren't in focus.

  5. #5

    Default Re: newbie need help on image sharpness

    1. Use the correct aperture
    2. Focus correctly
    3. Do not move
    4. Shoot

  6. #6
    Senior Member madmartian's Avatar
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    Default Re: newbie need help on image sharpness

    Quote Originally Posted by davidnn99 View Post
    hi, i am using EF-S 55-250 to get some flower shots. focus on flower but notice the objects next to it is blur, but further one seems sharp. is there something wrong with the lens ?
    second picture - seems abit soft. any comments ? what can i do to improve sharpness ? thanks for your help
    It dosen't really matter which lens you use, but please do yourself a favor. Try to understand the functions of the camera that help take a picture. Like how does an aperture work with focusing (DOF), with shutter speed & with exposure. Also elements of nature plays a part.
    Go & read up some books on flower photography & one of the important read is the camera's manual.
    Happy reading & happy shooting
    Take the shot!

  7. #7

    Default Re: newbie need help on image sharpness

    Quote Originally Posted by Diavonex View Post
    For tiny flower, use Spot Focusing.

    For a flower that fills the center of frame, use Center Weighted Focusing.

    If picture is soft, you can increase the in-camera Saturation

    Use a tripod if you do not have steady hands.

    Also read up Depth Of Field (DOF)

    Note: Different manufacturer use different names for their focusing system.

    hmmm... isn't spot & center weighted metering rather than focusing?

  8. #8
    Senior Member Diavonex's Avatar
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    Default Re: newbie need help on image sharpness

    Quote Originally Posted by chiangkxv View Post
    hmmm... isn't spot & center weighted metering rather than focusing?
    You must read up all about Focusing and Metering Mode. They are two different things.

  9. #9

    Default Re: newbie need help on image sharpness

    What's the shutter speed? does this also occur if flash fired?
    |SonyA700|T180mmf3.5|M70-210mmf4|S30mmf1.4|T17-50mmf2.8|T90mmf2.8|M5600hsdX2|

  10. #10

    Default Re: newbie need help on image sharpness

    Quote Originally Posted by Diavonex View Post
    For tiny flower, use Spot Focusing.

    For a flower that fills the center of frame, use Center Weighted Focusing.

    If picture is soft, you can increase the in-camera Saturation

    Use a tripod if you do not have steady hands.

    Also read up Depth Of Field (DOF)

    Note: Different manufacturer use different names for their focusing system.
    I did a google and I didn't get any result of any camera system having Center Weighted Focusing mode. And what the hell does saturation got to do with sharpness?

  11. #11

    Default Re: newbie need help on image sharpness

    hi there, i also just started photography not long ago.. jus sharing a lil of my knowledge..
    you can try searching center weighted average.. your camera hav metering mode?
    btw wad camera re u using?

    Quote Originally Posted by crusher View Post
    I did a google and I didn't get any result of any camera system having Center Weighted Focusing mode. And what the hell does saturation got to do with sharpness?

  12. #12

    Default Re: newbie need help on image sharpness

    thanks all the sifus for the tips. will read up and try it next time. the pics were taken hand held. dont know much about metering and have a slight understanding of DOF.

  13. #13

    Default Re: newbie need help on image sharpness

    and i am using 500D, no flash in bright daylight., using aperture priority

  14. #14
    Senior Member Diavonex's Avatar
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    Default Re: newbie need help on image sharpness

    Quote Originally Posted by crusher View Post
    I did a google and I didn't get any result of any camera system having Center Weighted Focusing mode. And what the hell does saturation got to do with sharpness?
    I suggested increasing the saturation because TS says his/her picture looks soft.
    Last edited by Diavonex; 1st July 2010 at 01:05 AM.

  15. #15
    Moderator Octarine's Avatar
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    Default Re: newbie need help on image sharpness

    Quote Originally Posted by Diavonex View Post
    For tiny flower, use Spot Focusing.
    For a flower that fills the center of frame, use Center Weighted Focusing.
    Care to show the source for these terms? So far I came across Spot Metering, Center Weighted Metering and others.. (e.g. Matrix metering). And then there is focusing: One Shot, Continuous Focusing (Canon: AI Servo) using either the center AF point or any other AF point or even a group of AF points.
    It's nice that you want to help but please use the correct terms and definitions, otherwise you just spread confusion.
    Last edited by Octarine; 30th June 2010 at 11:59 PM.
    EOS

  16. #16
    Senior Member Diavonex's Avatar
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    Default Re: newbie need help on image sharpness

    Okay it's Center AF and not Center-Weighted AF.

    Agree, it's important to use the right terminology.
    Last edited by Diavonex; 1st July 2010 at 12:38 AM.

  17. #17

    Default Re: newbie need help on image sharpness

    Quote Originally Posted by davidnn99 View Post
    hi, i am using EF-S 55-250 to get some flower shots. focus on flower but notice the objects next to it is blur, but further one seems sharp. is there something wrong with the lens ?

    second picture - seems abit soft. any comments ? what can i do to improve sharpness ? thanks for your help
    Try google for DOF.
    Basically the "further one" appears to be in the same plane as the flower your focusing is on, so it will be within the DOF (i.e sharp)
    The "next to it" is blur:
    most prob as it is on another plane and out of the depth for your chosen aperture
    or/and it is slightly moving.

    2nd image, help yourself by shooting on a tripod. If you want to learn, experiment to shoot at different shutter speed to familiarize yourself at what shutter speed you need to freeze yr subjects.

    Any do note the difference bet Focusing, Metering, Softness and Saturation

    Cheers

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    Default Re: newbie need help on image sharpness

    Quote Originally Posted by Diavonex View Post
    For tiny flower, use Spot Focusing.

    For a flower that fills the center of frame, use Center Weighted Focusing.

    If picture is soft, you can increase the in-camera Saturation


    Note: Different manufacturer use different names for their focusing system.
    Do you even know what you're talking about???

  19. #19
    Senior Member Diavonex's Avatar
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    Default Re: newbie need help on image sharpness

    Quote Originally Posted by Scoop View Post
    Do you even know what you're talking about???
    Yes, I did use the wrong terminology center-weighted focusing instead of center focusing.

    So enjoy and rub it in.

  20. #20
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    Default Re: newbie need help on image sharpness

    if you are using AI-servo mode, the camera may tend to off-focus occasionally.. especially if the subject is moving (or in low light).. the flowers in 2nd pics tend to move a lot even with little wind.. so you might want to check again the AF mode also..
    1st picture seems fine to my eyes.. the blurred ones are due to DOF..
    Last edited by aungzawwin; 1st July 2010 at 11:13 AM.

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