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Thread: Tang Shooters LXXXIII - TCSS Thread...

  1. #501

    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by lkkang View Post

    I have seen that thread...
    and it is very confusing in a sense that it is not easy to understand optics.
    We are cool, just friendly discussion nia..

    For a same lens ( say 50mm ), if you mount onto different body, you are only seeing part or portion of the image circle produced from this lens.

    imagine a portrait shoot.
    Scenario 1:
    all standing the same distance away from the subject
    using medium format will let you shoot a full body of the subject with 50mm lens
    using FF format will let you shoot half body and
    using cropped sensor will let you shoot head and shoulder only.

    The amount of bokeh is the same when all is using the same F-stop and because distance from lens to subject is the same.

    Scenario 2:
    medium format is standing 3m from the subject and is shooting full body of the subject.
    FF format is standing 5m from the subject and is also shooting full body of the subject.
    cropped sensor is standing 8m from the subject and is also shooting full body of the subject.

    The amount of bokeh is different when all is using the same F-stop. Because the distance of the subject is different. When your subject is nearer to you, you tend to produce better bokeh ( this is optics ). This can be easily felt when you are shooting macro..... the macro subject is so close to your lens and even at F16, slightly mis-focus and your subject is blur already.
    Quote Originally Posted by jawzsg View Post
    Yeshz...blazy bbbuttie, the specified Circle of Confusion for a crop @ 1.6 = 0.019mm and FF ish 0.03mm, and based on the formula for DOF calculation,

    Dn= s(H-f) / H+s-2f
    Df = s(H-f) / H-s

    where H = Hyperfocal distance calculated based on the circle of confusion. Hence there is an advantage in the FF with regards to background blur...

    thankx billy thankx camel... i go back read...
    cant read now else for sure i fall in sleep in office

  2. #502
    Member/Tangshooter zh3ng's Avatar
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    for the first time, TCSS got into some serious photography technical discussions!!

  3. #503
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by lkkang View Post

    I have seen that thread...
    and it is very confusing in a sense that it is not easy to understand optics.
    We are cool, just friendly discussion nia..

    For a same lens ( say 50mm ), if you mount onto different body, you are only seeing part or portion of the image circle produced from this lens.

    imagine a portrait shoot.
    Scenario 1:
    all standing the same distance away from the subject
    using medium format will let you shoot a full body of the subject with 50mm lens
    using FF format will let you shoot half body and
    using cropped sensor will let you shoot head and shoulder only.

    The amount of bokeh is the same when all is using the same F-stop and because distance from lens to subject is the same.

    Scenario 2:
    medium format is standing 3m from the subject and is shooting full body of the subject.
    FF format is standing 5m from the subject and is also shooting full body of the subject.
    cropped sensor is standing 8m from the subject and is also shooting full body of the subject.

    The amount of bokeh is different when all is using the same F-stop. Because the distance of the subject is different. When your subject is nearer to you, you tend to produce better bokeh ( this is optics ). This can be easily felt when you are shooting macro..... the macro subject is so close to your lens and even at F16, slightly mis-focus and your subject is blur already.
    thanks for sharing.

  4. #504

    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by zh3ng View Post
    for the first time, TCSS got into some serious photography technical discussions!!
    i know camel, billy n king james is serious one
    and i wont surprise if tonight c camel post some sample of his test
    Last edited by juste_millieu; 18th March 2010 at 11:26 AM.

  5. #505
    Member/Tangshooter
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by lkkang View Post

    I have seen that thread...
    and it is very confusing in a sense that it is not easy to understand optics.
    We are cool, just friendly discussion nia..

    For a same lens ( say 50mm ), if you mount onto different body, you are only seeing part or portion of the image circle produced from this lens.

    imagine a portrait shoot.
    Scenario 1:
    all standing the same distance away from the subject
    using medium format will let you shoot a full body of the subject with 50mm lens
    using FF format will let you shoot half body and
    using cropped sensor will let you shoot head and shoulder only.

    The amount of bokeh is the same when all is using the same F-stop and because distance from lens to subject is the same.

    Scenario 2:
    medium format is standing 3m from the subject and is shooting full body of the subject.
    FF format is standing 5m from the subject and is also shooting full body of the subject.
    cropped sensor is standing 8m from the subject and is also shooting full body of the subject.

    The amount of bokeh is different when all is using the same F-stop. Because the distance of the subject is different. When your subject is nearer to you, you tend to produce better bokeh ( this is optics ). This can be easily felt when you are shooting macro..... the macro subject is so close to your lens and even at F16, slightly mis-focus and your subject is blur already.
    Good explaination!
    Scenario 2 sounds logical to me...
    This is an electronic post which requires no signature.

  6. #506
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by jawzsg View Post
    Yeshz...blazy bbbuttie, the specified Circle of Confusion for a crop @ 1.6 = 0.019mm and FF ish 0.03mm, and based on the formula for DOF calculation,

    Dn= s(H-f) / H+s-2f
    Df = s(H-f) / H-s

    where H = Hyperfocal distance calculated based on the circle of confusion. Hence there is an advantage in the FF with regards to background blur...
    u r the man! gotch formula oso!
    Dr jawzsg!
    This is an electronic post which requires no signature.

  7. #507
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by jawzsg View Post
    Yeshz...blazy bbbuttie, the specified Circle of Confusion for a crop @ 1.6 = 0.019mm and FF ish 0.03mm, and based on the formula for DOF calculation,

    Dn= s(H-f) / H+s-2f
    Df = s(H-f) / H-s

    where H = Hyperfocal distance calculated based on the circle of confusion. Hence there is an advantage in the FF with regards to background blur...
    this camel is prof camel

  8. #508
    Member/Tangshooter zh3ng's Avatar
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    DOF not mean Depth of Females meh?

    If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

    the bigger the boobie, the more bokeh u get.

  9. #509

    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by zh3ng View Post
    DOF not mean Depth of Females meh?

    If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

    the bigger the boobie, the more bokeh u get.

  10. #510

    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    zheng buttie, today so bz har?
    didnt c u login msn oso

  11. #511
    Member/Tangshooter zh3ng's Avatar
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by juste_millieu View Post
    zheng buttie, today so bz har?
    didnt c u login msn oso
    ohhh. no leh. haha i forgot to on. haha.

  12. #512
    Member/Tangshooter Redsun's Avatar
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by zh3ng View Post
    DOF not mean Depth of Females meh?

    If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

    the bigger the boobie, the more bokeh u get.
    quote 1st for ronger to see

  13. #513
    Member/Tangshooter zh3ng's Avatar
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by Redsun View Post
    quote 1st for ronger to see
    harlow rs korkor

  14. #514

    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by Redsun View Post
    quote 1st for ronger to see
    good morning ronald.... have u decide which backpack to bbb?

  15. #515
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by zh3ng View Post
    DOF not mean Depth of Females meh?

    If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

    the bigger the boobie, the more bokeh u get.
    poison too deep liao

  16. #516
    Member Jimmy81's Avatar
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by zh3ng View Post
    DOF not mean Depth of Females meh?

    If you stand nearer to a female wib big boobie(aperture), the more you will stare(focus) at the boobie only resulting in all other things to be blur (bokeh).

    the bigger the boobie, the more bokeh u get.
    Stare too long will get a palm mark on ur face

  17. #517
    Member/Tangshooter zh3ng's Avatar
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by Jimmy81 View Post
    Stare too long will get a palm mark on ur face
    then your mind will go gong gong and see stars. This we call Overexposed.

  18. #518
    Member/Tangshooter Redsun's Avatar
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    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    Quote Originally Posted by juste_millieu View Post
    good morning ronald.... have u decide which backpack to bbb?
    lol going cp to see

  19. #519

    Default Re: Tang Shooters LXXXIII - TCSS Thread...

    battlestar galactica - human
    Video Missing

    battlestar galactica - cyclon
    Video Missing

  20. #520

    Default Re: Tang Shooters LXXXIII - TCSS Thread...


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