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Thread: 50MM F1.8 or 50MM F1.4?

  1. #1

    Default 50MM F1.8 or 50MM F1.4?

    Hi all, i'm just thinking to sell away my 50MM F1.8 and buy a 50MMF1.4. Has been thinking about it for quite some time now.
    What are the pros and cons between this 2 lens? Will the 50MM F1.4 produce a more crisp and clearer image? Thank you all for your advices Merry Christmas!

  2. #2
    Senior Member Override2Zion's Avatar
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    Default Re: 50MM F1.8 or 50MM F1.4?

    Quote Originally Posted by ctxx83 View Post
    Hi all, i'm just thinking to sell away my 50MM F1.8 and buy a 50MMF1.4. Has been thinking about it for quite some time now.
    What are the pros and cons between this 2 lens? Will the 50MM F1.4 produce a more crisp and clearer image? Thank you all for your advices Merry Christmas!
    Generally lenses aren't at their sharpest when wide open, the sweet spot is usually 1 to 2 stops down from the wides aperture. So if you're looking for good sharpness, nice bokeh and have some money to spare then go for the 50mm f/1.4. However, the cost of the f/1.4 would be significantly higher than the value for money f/1.8. Upgrading from a f/1.8 to f/1.4, you gain about 2/3 stops
    Last edited by Override2Zion; 25th December 2010 at 12:30 PM.
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    Senior Member SilverPine's Avatar
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    Default Re: 50MM F1.8 or 50MM F1.4?

    See it with your own eye:

    Digital SLR and Lens Image Quality Comparison - ISO 12233 Chart 100% Crops

    http://www.the-digital-picture.com/R...mp=0&APIComp=5

    .
    Canon 5D II, 20-35 f/2.8L, 28-80 f/2.8L, 70-200 f/4L IS, 100-300 f/5.6L, 100 f/2.8 Macro

  4. #4

    Default Re: 50MM F1.8 or 50MM F1.4?

    Have you considered the Sigma 50 f1.4?

  5. #5

    Default Re: 50MM F1.8 or 50MM F1.4?

    hi Ismokeweed, i prefer canon lens. Tamron and other brand lens, is it comparable to canon lens?

  6. #6

    Default Re: 50MM F1.8 or 50MM F1.4?

    Quote Originally Posted by Override2Zion View Post
    Generally lenses aren't at their sharpest when wide open, the sweet spot is usually 1 to 2 stops down from the wides aperture. So if you're looking for good sharpness, nice bokeh and have some money to spare then go for the 50mm f/1.4. However, the cost of the f/1.4 would be significantly higher than the value for money f/1.8. Upgrading from a f/1.8 to f/1.4, you gain about 2/3 stops
    Hi Zion, what do you mean by 2/3 stops? what is stop? And what do you mean by wide open? hee sorry i'm a noob

  7. #7

    Default Re: 50MM F1.8 or 50MM F1.4?

    Quote Originally Posted by SilverPine View Post
    See it with your own eye:

    Digital SLR and Lens Image Quality Comparison - ISO 12233 Chart 100% Crops

    http://www.the-digital-picture.com/R...mp=0&APIComp=5

    .
    Hi Sliverpine, how do i read the picture which you've posted? Thank you!

  8. #8

    Default Re: 50MM F1.8 or 50MM F1.4?

    Quote Originally Posted by ctxx83 View Post
    Hi Zion, what do you mean by 2/3 stops? what is stop? And what do you mean by wide open? hee sorry i'm a noob
    wide open means the largest possible aperture for that lens, 1 stop of light means twice the amount of light. so for an exposure using 1/30s with f2.8, you can get 1/60s with f1.2 and get the same exposure.

  9. #9

    Default Re: 50MM F1.8 or 50MM F1.4?

    Quote Originally Posted by ctxx83 View Post
    hi Ismokeweed, i prefer canon lens. Tamron and other brand lens, is it comparable to canon lens?
    The sigma is sharper than the canon.

  10. #10
    Senior Member SilverPine's Avatar
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    Default Re: 50MM F1.8 or 50MM F1.4?

    Quote Originally Posted by ctxx83 View Post
    Hi Sliverpine, how do i read the picture which you've posted? Thank you!
    Two lens for comparation, selection on the left is f/1.4 right is f/1.8
    Please selection your camera currently used.
    Selection the f stop for both lens you need to compare.
    Picture show the f/1.4 lens used when your mouse pointer is outside the picture, move your mouse pointer inside the picture, the picture will change to picture taken from f/1.8.

    This method is the show how sharp the lens look like when you use it with your camera type.

    .
    Canon 5D II, 20-35 f/2.8L, 28-80 f/2.8L, 70-200 f/4L IS, 100-300 f/5.6L, 100 f/2.8 Macro

  11. #11
    Senior Member Override2Zion's Avatar
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    Default Re: 50MM F1.8 or 50MM F1.4?

    Quote Originally Posted by ctxx83 View Post
    Hi Zion, what do you mean by 2/3 stops? what is stop? And what do you mean by wide open? hee sorry i'm a noob
    A stop increase in light means twice as light as before. Cameras usually allow you to adjust shutter/aperture/iso based on 1/2 or 1/3 stops

    Here is a scale of 1/3 increments for aperture,
    1.0 1.1 1.2 1.4 1.6 1.8 2.0 2.2 2.5 2.8 3.2 3.5 4 4.5 5.0 5.6 6.3 7.1 8 9 10 11 13 14 16 18 20 22
    The full-stops are highlighted in Red.

    If you have a f/1.4 lens, that means the aperture goes up to 1.4 wide open. As the number increases, it means your aperture goes smaller. Every full stop you decrease the aperture size by, you are halving the amount light of light entering your camera per unit time. For example, f/1.4 -> f/2.0, you are reducing 1 full stop, at f/2.0 you get half the amount of light entering the camera as compared to f/1.4.

    Quote Originally Posted by AhKar View Post
    ...so for an exposure using 1/30s with f2.8, you can get 1/60s with f1.2 and get the same exposure.
    Actually this calculation is incorrect, 1/30s -> 1/60s is 1 stop decrease in light, to compensate for that to get same exposure you must set aperture from f/2.8 -> f/2 to gain 1 stop of light.
    Last edited by Override2Zion; 26th December 2010 at 11:04 AM.
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  12. #12
    Senior Member SilverPine's Avatar
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    Default Re: 50MM F1.8 or 50MM F1.4?

    Quote Originally Posted by rickymartin View Post
    The sigma is sharper than the canon.
    Compare Canon 50mm f/1.4 with Sigma 50mm f/1.4 using f/5.6 as example, for Sigma's lens corner of the picture is softer:

    Digital SLR and Lens Image Quality Comparison - ISO 12233 Chart 100% Crops

    http://www.the-digital-picture.com/R...mp=0&APIComp=6

    .
    Canon 5D II, 20-35 f/2.8L, 28-80 f/2.8L, 70-200 f/4L IS, 100-300 f/5.6L, 100 f/2.8 Macro

  13. #13

    Default Re: 50MM F1.8 or 50MM F1.4?

    Thanks a millions, fellows! you guys are great! Thank you all for the advices and the theories. Thank you again!

  14. #14
    Moderator Octarine's Avatar
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    Default Re: 50MM F1.8 or 50MM F1.4?

    Since TS has no clue about the very basics the discussion between different lenses is quite pointless. Back to the Newbies Guide.
    EOS

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    Member dennisc's Avatar
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    Default Re: 50MM F1.8 or 50MM F1.4?

    Canon 50mm 1.4 is a gem of a lens to me, luv the contrast and the certain feel on the pics it produces. I'm sure a few owners would vouch on it. Luv it almost as much as the 85mm f1.2
    Happy 51st Nday Singapore!!!! Shot this Taiwanese Model @ 30th July Nday fireworks

  16. #16

    Default Re: 50MM F1.8 or 50MM F1.4?

    go with sigma 50 1.4, way better in ca control and sharpness over canon, higher accuracy and performance is truly premium

    barrel distortion is very minimal wide open

    canon 50 1.4 is still soft, not worth investing if picture quality really matters to ya brudda

    edit : i'd rather ya stick to ya 1.8
    Last edited by Kiwira; 26th December 2010 at 07:24 AM.
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