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Thread: Canon 50mm f/1.8 lens - sharpness

  1. #1

    Default Canon 50mm f/1.8 lens - sharpness

    Hi all

    I'm new to DSLRs. Wanted to check if the sharpness of the the Canon 50mm f/1.8 lens is only at the autofocus points (using 1000D) which lights up as red in the viewfinder? Realise that the surrounding areas are blurred. Is this the way it should be ? Wanted to attach one picture but the posting rules doesn't allow me to attach (wonder why?).

    Thanks in advance. cheers

  2. #2

    Default Re: Canon 50mm f/1.8 lens - sharpness

    It depends on the aperture that you are using. I suggest you read a bit more about depth of field. Your manual will also cover this topic in the "aperture" section.

    Try stopping down the aperture to 2.8, 4, 8 and 16 and you'll see the correlation.
    Alpha

  3. #3

    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by debs1153 View Post
    Wanted to attach one picture but the posting rules doesn't allow me to attach (wonder why?).
    Right here in the Newbies Corner is a sticky called "forum-related FAQs for newbies". Read there how to post images here.
    Alpha

  4. #4
    Senior Member
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    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by debs1153 View Post
    Hi all

    I'm new to DSLRs. Wanted to check if the sharpness of the the Canon 50mm f/1.8 lens is only at the autofocus points (using 1000D) which lights up as red in the viewfinder? Realise that the surrounding areas are blurred. Is this the way it should be ? Wanted to attach one picture but the posting rules doesn't allow me to attach (wonder why?).

    Thanks in advance. cheers
    The amount of background blur or 'bokeh' depends on aperture used and distance between u and your subject, and your subject to the background.

    As of now u only have 3 posts and there are certain criteria for pictures posting, so it's not possible for u yet.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  5. #5

    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by Snoweagle View Post
    As of now u only have 3 posts and there are certain criteria for pictures posting, so it's not possible for u yet.
    Oh? LOL, forgot the limitations
    Alpha

  6. #6

    Default Re: Canon 50mm f/1.8 lens - sharpness

    Well, you could post a link to the photo instead and provide the exif as well so people could help more.

  7. #7

    Default Re: Canon 50mm f/1.8 lens - sharpness

    I could post images on my second ever post on the forums o.O

    Will be interested to see the photos. 50mm f1.8 is such a gorgeous lens.

  8. #8

    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by Snoweagle View Post
    The amount of background blur or 'bokeh' depends on aperture used and distance between u and your subject, and your subject to the background.
    "bokeh" is the "quality" of background blur, not amount.

  9. #9
    Senior Member limwhow's Avatar
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    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by miaoteh View Post
    "bokeh" is the "quality" of background blur, not amount.
    Wah.. haha... Snoweagle, you kena humtum!

  10. #10
    Senior Member giantcanopy's Avatar
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    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by debs1153 View Post
    Hi all

    I'm new to DSLRs. Wanted to check if the sharpness of the the Canon 50mm f/1.8 lens is only at the autofocus points (using 1000D) which lights up as red in the viewfinder? Realise that the surrounding areas are blurred. Is this the way it should be ? Wanted to attach one picture but the posting rules doesn't allow me to attach (wonder why?).

    Thanks in advance. cheers
    U will always be viewing at maximal aperture of 1.8 in this instance thru the viewfinder except when u depress the DoF preview button in the event u stop down the aperture and u would like to see how the depth of field appears

    The stop down in aperture is automatic when u snap the shutter release. the picture will translate the aperture u set.

    * but if u r complaining about the razor thin dof in the pics u got save the focussed point, then it is because of a larger aperture.

    happy shooting!

    ryan
    Last edited by giantcanopy; 8th November 2009 at 05:18 PM.

  11. #11
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    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by miaoteh View Post
    "bokeh" is the "quality" of background blur, not amount.
    bokeh is simply the blur in out-of-focus areas of an image. -.-

  12. #12

    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by limwhow View Post
    Wah.. haha... Snoweagle, you kena humtum!
    not to humtum anyone lar..

    Quote Originally Posted by coolin View Post
    bokeh is simply the blur in out-of-focus areas of an image. -.-
    http://en.wikipedia.org/wiki/Bokeh
    http://www.bobatkins.com/photography...cal/bokeh.html
    http://www.kenrockwell.com/tech/bokeh.htm

  13. #13
    Deregistered shaoken's Avatar
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    Default Re: Canon 50mm f/1.8 lens - sharpness

    This has to do with Depth Of Field (DOF)..

  14. #14
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    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by limwhow View Post
    Wah.. haha... Snoweagle, you kena humtum!
    Dotsss...
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  15. #15

    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by coolin View Post
    bokeh is simply the blur in out-of-focus areas of an image. -.-
    Nope. That's wrong.
    Alpha

  16. #16

    Default Re: Canon 50mm f/1.8 lens - sharpness

    Quote Originally Posted by coolin View Post
    bokeh is simply the blur in out-of-focus areas of an image. -.-
    Totally wrong..... read up the link Miaoteh has posted

  17. #17

    Default Re: Canon 50mm f/1.8 lens - sharpness

    guys, thanks for all your help. Based on your feedback, realised that I was too close to the subject, took more pictures and understand it better now. The lens is sharp and like the picture quality....happy to register the warranty now. cheers.

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