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Thread: Sigma 70-200mm f2.8 shots

  1. #1

    Default Sigma 70-200mm f2.8 shots

    Just got myself a new lens. Is this lens sharp enough? It's my first time buying a second hand lens ><









    Thanks. (:

  2. #2

    Default Re: Sigma 70-200mm f2.8 shots









    Some more reference shots, btw the autofocus of the lens tends to be out of focus sometimes, so i'm getting about 70% focused vs 30% out-of-focused shots.

  3. #3
    Moderator rhino123's Avatar
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    Default Re: Sigma 70-200mm f2.8 shots

    I don't understand... do you find the lens sharp enough (yourself?), or do you suspect that the lens is faulty because it was not performing to your expectation?

    As to the lens tends to be out of focus sometime might be because of your own technique and not the lens' problem. If you are shooting at moving subject at a shallow DOF, when that subject was out of the plane, of course you get out of focus shot.
    I am not a photographer, just someone who happened to have a couple of cameras.
    My lousy shots

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    Default Re: Sigma 70-200mm f2.8 shots

    As Rhino pointed out, Sharpness is decided by the user him/herself. Each person's acceptable sharpness differs. The OOF may also be user technique problem. If it's the user technique problem, even with the 'original' 70-200 f2.8 also will get oof.
    Too many great equipments but too little quality photos. [My Flickr] | [My Blog]

  5. #5

    Default Re: Sigma 70-200mm f2.8 shots

    all the ref pics looks sharp though (websize).

  6. #6

    Default Re: Sigma 70-200mm f2.8 shots

    Sharp meaning, as compared to the same lens. I'm just hoping that I won't bump into a lens that's faulty, and then if I want to sell it off I can't. ><

  7. #7

    Default Re: Sigma 70-200mm f2.8 shots

    As the stage lights are often blue, purple, green and all sorts of colour other than white, is there any white balance settings that can compensate for the random change of lighting colours? :/

  8. #8

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    Quote Originally Posted by holyxiaoxin View Post
    As the stage lights are often blue, purple, green and all sorts of colour other than white, is there any white balance settings that can compensate for the random change of lighting colours? :/
    Shoot in black and white. All fixed.

    The colored lights add the the feel of the shots, providing a viewer with more of the mood that was there. Why try to remove it?
    Last edited by Rashkae; 21st March 2013 at 11:58 AM.
    Alpha

  9. #9

    Default Re: Sigma 70-200mm f2.8 shots

    Quote Originally Posted by holyxiaoxin View Post
    As the stage lights are often blue, purple, green and all sorts of colour other than white, is there any white balance settings that can compensate for the random change of lighting colours? :/
    Nothing you can do in camera. You can try adjusting the individual channels in post but it's not worth the time.
    Last edited by dodgethis; 21st March 2013 at 12:44 PM.
    Canon 5D MkIII|70-200 f/2.8L IS II USM|24-70 f2.8 L II USM|Σ 50 f1.4 EX DG HSM

  10. #10
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    Default Re: Sigma 70-200mm f2.8 shots

    Quote Originally Posted by holyxiaoxin View Post
    As the stage lights are often blue, purple, green and all sorts of colour other than white, is there any white balance settings that can compensate for the random change of lighting colours? :/
    What I do is, get the WB of the stage before any of those coloured lights are on, use this shot as the base for your "true" white. Then set the custom WB based on this shot. After the CWB, just continue to shoot as per normal..

    And shoot in raw, and should there be any changes to the WB, just adjust the first one, then mass apply to the rest (can be done pretty quickly in LR, Sync all). This should get you closer to what you see....
    Too many great equipments but too little quality photos. [My Flickr] | [My Blog]

  11. #11
    Moderator rhino123's Avatar
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    Default Re: Sigma 70-200mm f2.8 shots

    Quote Originally Posted by holyxiaoxin View Post
    Sharp meaning, as compared to the same lens. I'm just hoping that I won't bump into a lens that's faulty, and then if I want to sell it off I can't. ><
    Again... nobody know for sure... bcos nobody know what setting you are using, what is the environment those shots are taken in, what is the condition, etc... so nobody know if that lens is sharp enough, even if he/she had another copy of the lens. The only way to test is to mount the same camera on a sturdy tripod, then take two different copies of the same lens, mount them one by one to the test camera, took a couple of shots at the same target at a controlled environment, then you can tell if the lens you got is sharp enough... even then it is not really representative.
    I am not a photographer, just someone who happened to have a couple of cameras.
    My lousy shots

  12. #12
    Moderator rhino123's Avatar
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    Default Re: Sigma 70-200mm f2.8 shots

    Quote Originally Posted by holyxiaoxin View Post
    As the stage lights are often blue, purple, green and all sorts of colour other than white, is there any white balance settings that can compensate for the random change of lighting colours? :/
    Frankly speaking... no.

    You can shoot in RAW, then post process it like mentioned before.
    I am not a photographer, just someone who happened to have a couple of cameras.
    My lousy shots

  13. #13
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    Default Re: Sigma 70-200mm f2.8 shots

    Dear TS, in your quest to determine the sharpness of your purchase you have chosen a set of challenging conditions to test it. Try again in better light and use a tripod in order to eliminate the other main cause of blur images i.e. shaky hands. Good luck.

  14. #14

    Default Re: Sigma 70-200mm f2.8 shots

    to me it look sharp here, maybe you can provide some with 100% corp pic.

    btw Sigma 70-200 os? hsm? hsm ii?

  15. #15

    Default Re: Sigma 70-200mm f2.8 shots

    btw i used a hsm ii b4 for quite sometime, it's acceptable at 2.8 but iq improve when stop down to 5.6 ~~~

  16. #16
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    Default

    Well can see individual strands of hair, looks pretty sharp, how 'sharp' you want..lol

  17. #17

    Default Re: Sigma 70-200mm f2.8 shots

    Sigma 70-200mm F2.8 EX DG Macro HSM II, i will post a 100% crop soon.

  18. #18

    Default Re: Sigma 70-200mm f2.8 shots

    There are the 100% crop unedited photos.




  19. #19

    Default Re: Sigma 70-200mm f2.8 shots

    are there easier ways to obtained 100% cropped photos from lightroom4, than just crop using the boxes icon on the develop section, by guessing the 1:1 crop and then slowly adjust my cropping up to 1:1?

  20. #20

    Default Re: Sigma 70-200mm f2.8 shots

    looks ok to me.

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