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Thread: No Bokeh

  1. #21
    Moderator ziploc's Avatar
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    Default Re: No Bokeh

    Quote Originally Posted by Dark Matter View Post
    I am using f2.8 initially but no bokeh so i try again using f2.0, but also no bokeh. Infact seem like same effect for both picture. Oh...I am using A mode.
    Assuming CoC=0.02mm. At 50mm focal length, f/2.8 and focusing distance = 10m, your DOF is 8.16m to 12.9m. If the background is 50m away, it should be out of focus. View your pic on your PC and not the LCD. The LCD is too small to notice it.

  2. #22
    Moderator daredevil123's Avatar
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    Default Re: No Bokeh

    Yup.

    focal length = 50mm
    aperture = f/2.8
    CoC = 0.02 (Nikon D90, D80, D70, D60, D40, D40x)
    Subject distance 10 m

    Depth of field
    Near limit 8.16 m
    Far limit 12.9 m
    Total 4.74 m

    In front of subject 1.84 m (39%)
    Behind subject 2.91 m (61%)

    Hyperfocal distance 44.2 m
    Circle of confusion 0.02 mm

    Looking at this, the DoF range is actually quite big at aroudn 4.5m. Meaning the OOF effect is probably not as much or as creamy as you want it to be. So on a camera LCD, you probably cannot see too much of the out of focus effect.
    And if you are wondering about hyperfocal distance, focusing at a point 44.2m away, everything from 22.1m away till infinity will be sharp in focus.

  3. #23
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    Default Re: No Bokeh

    In the first place.. is the subject in focus? i.e. sharp.

    Using F2.8, If the subject at 10m is sharp and the BG at 50m is not blur.. then it is a bit weird..

    Could it be that the subject is actually not in focus and you happened to focus somewhere between the subject and the BG? then both will be "a little blur"..

    If you had focused at infinity, the BG would likely have very little "bokeh". and the subject should be blurred.. if you're taking a portrait, the subject is probably unrecognizable.

    w/o picture, what actually happens is probably guesswork.. subject to different pple's interpretation of what is the actual situation.


    Quote Originally Posted by Dark Matter View Post
    If the subject is about 10m away and background is about 50m away. Will there be a bokeh effect on the background if I shoot with a 50mm f1.8 using AF. Cause I tried this morning and there is only a very very little bokeh effect. Is it my ignorance or because it is focusing at infinite length thats why there is no bokeh effect.

    I dont recall any article mention anything on this when i read through those article on bokeh. Thus coming here to seek advise from senior and expert. Do bear with me as a noob if my questions sounds ignorance.

  4. #24
    Senior Member ZerocoolAstra's Avatar
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    Default Re: No Bokeh

    ya please post a photo for review
    Exploring! :)

  5. #25

    Default Re: No Bokeh

    My cable to transfer file still with my brother...and me have no card reader so sorry photo still in my camera...
    A photo is an art painted by light.

  6. #26
    Senior Member ZerocoolAstra's Avatar
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    Default Re: No Bokeh

    Quote Originally Posted by Dark Matter View Post
    My cable to transfer file still with my brother...and me have no card reader so sorry photo still in my camera...
    check THIS out!

    cheap and good! I bought 3pcs (to put at home, in my laptop bag, etc... so I never go without one!). All working perfectly.
    Last edited by ZerocoolAstra; 5th October 2009 at 09:21 AM.
    Exploring! :)

  7. #27

    Default Re: No Bokeh

    Quote Originally Posted by ZerocoolAstra View Post
    check THIS out!

    cheap and good! I bought 3pcs (to put at home, in my laptop bag, etc... so I never go without one!). All working perfectly.
    Except that they actually only work at USB 1.1 speeds.
    Alpha

  8. #28
    Senior Member ZerocoolAstra's Avatar
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    Default Re: No Bokeh

    errr... so?


    they're charging $2.70 (incl. delivery) for a device that can read/write SD/SDHC... What more can I ask for?
    Exploring! :)

  9. #29

    Default Re: No Bokeh

    I had also found some Card Reader (multi-card). 1 price at SGD8.80 reads 16 cards (approx) at USB 2.0 speed.

    BTW do I still need to post my pic?
    A photo is an art painted by light.

  10. #30
    Senior Member ZerocoolAstra's Avatar
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    Default Re: No Bokeh

    well, if you still have any doubts you need to clarify, please do post up.
    Nobody's forcing you
    Exploring! :)

  11. #31
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    Default Re: No Bokeh

    Refer post #24..

    Quote Originally Posted by Dark Matter View Post

    BTW do I still need to post my pic?

  12. #32

    Default Re: No Bokeh

    I feels that this shot is not well taken, so abit shy to post it out. But any way here it goes...

    A photo is an art painted by light.

  13. #33

    Default Re: No Bokeh

    You removed all the EXIf data. Please tell us the shot settings, especially the f-stop.

    But in that pic you can see that the background is a bit OOF, so you have some already.
    Alpha

  14. #34

    Default Re: No Bokeh

    the background is too near and the object is too big for the focal length to render any bokeh. even if u shooting a full length portraits, u probably wont get a good bokeh with this situation.

  15. #35
    Senior Member ZerocoolAstra's Avatar
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    Default Re: No Bokeh

    Quote Originally Posted by Dark Matter View Post
    I feels that this shot is not well taken, so abit shy to post it out. But any way here it goes...

    You used a 50mm/1.8 on a DX-format camera, yet you managed to fit the entire car + some space into the frame. This tells me you were a hell of a long distance from the car.
    In all likelihood the background-subject distance is probably only twice as much as the camera-subject distance. How to make the background significantly out of focus in this case?
    Exploring! :)

  16. #36
    Senior Member ZerocoolAstra's Avatar
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    Default Re: No Bokeh

    actually it looks like the focusing is out as well. The car does not appear to be 100% in focus.
    Exploring! :)

  17. #37

    Default Re: No Bokeh

    Quote Originally Posted by Rashkae View Post
    You removed all the EXIf data. Please tell us the shot settings, especially the f-stop.

    But in that pic you can see that the background is a bit OOF, so you have some already.
    BTW...How do remove EXIF data I also dont know...I only resize and adjust exposure by nero photo editor. Here my setting...

    1/4000__f1.8__ISO 200__A mode__AF-S 50mm f1.8__auto WB.

    Quote Originally Posted by flipfreak View Post
    the background is too near and the object is too big for the focal length to render any bokeh. even if u shooting a full length portraits, u probably wont get a good bokeh with this situation.
    OK.
    A photo is an art painted by light.

  18. #38

    Default Re: No Bokeh

    Quote Originally Posted by ZerocoolAstra View Post
    You used a 50mm/1.8 on a DX-format camera, yet you managed to fit the entire car + some space into the frame. This tells me you were a hell of a long distance from the car.
    In all likelihood the background-subject distance is probably only twice as much as the camera-subject distance. How to make the background significantly out of focus in this case?
    me----------car-----------------------------building

    Approximately like that.
    A photo is an art painted by light.

  19. #39

    Default Re: No Bokeh

    Quote Originally Posted by ZerocoolAstra View Post
    actually it looks like the focusing is out as well. The car does not appear to be 100% in focus.
    Is it due to f1.8 cause I focus on the fog lamp (manual select single point focus)
    A photo is an art painted by light.

  20. #40
    Senior Member ZerocoolAstra's Avatar
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    Default Re: No Bokeh

    Quote Originally Posted by Dark Matter
    me----------car-----------------------------building

    Approximately like that.
    ideally should be
    camera--subject------------------------------------------------------------background

    and even then you're not going to get a really smooth blur. Blur enough to look nice, but not sports page (EPL) kind of blur.


    Quote Originally Posted by Dark Matter
    Is it due to f1.8 cause I focus on the fog lamp (manual select single point focus)
    fog lamp is not 100% in focus. Looks like the ground slightly nearer than the bird is in focus.
    it looks like a focus problem, not due to the depth of field.
    My 50/1.8 is pretty sharp where I focus it, even at f/1.8
    Some people say the lens is soft at that aperture, but it still looks sharp enough to me.
    Exploring! :)

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