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  1. #1
    Join Date
    Aug 2006
    Location
    Chicago, IL USA
    Posts
    935

    Would you send this lens in for repair?

    Hey all. Ive been having sporadic issues with my 12-24/4 where the left side of the image is all messed up. Its blurry, or choppy, or whatever. Its just not good.

    Here is a shot I took at one of our job sites (I'm an Architect) of some of the construction going on. As you can see, everything is in great focus except for the ladder/coat/paint supplies. The entire floor is good, the background is good, the doors on the right hand side are good, but the ladder just didn't want to stay in focus. To me, this means that its a lens issue, not a focusing issue.

    Please take a look at the image below and tell me I'm not just seeing things.

    Edit: Sorry for the large image, but you just couldn't see how bad the ladder was at 800 pixels. It was necessary...
    Last edited by VTEC_EATER; 12-15-2008 at 08:12 AM.
    Nikon D300 | MB-D10 | Nikkor 12-24/4 | Nikkor 50/1.8 | Nikkor 70-200/2.8 VRI | Sigma 18-50/2.8 | SB-800 | SB-80DX (x4) | Radiopopper JrX Studio |

  2. #2
    Join Date
    Sep 2007
    Location
    Near Seattle, WA
    Posts
    368
    I'd agree with you. That left side doesn't look so hot.

    However, I'd find a brick wall to shoot - just to prove this issue beyond a doubt.
    Sam


    Nikon D80, D300s, Nikkormat EL, Tamron 17-50mm f2.8, 55-200mm f4-f5.6 VR AF-S Nikkor, 50mm f1.8 AF-D Nikkor, 80-200mm f2.8 AF-D Nikkor, 135mm f2.8 Nikkor-Q pre-AI, Hanimex 35mm f2.8 doorstop

    www.flickr.com/photos/swpars

  3. #3
    Join Date
    Mar 2005
    Location
    London
    Posts
    1,887
    hmm, it does seem blurry. Does this happen at all focal lengths and apertures?

    oh, and does it happen with other lenses (therefore ruling out a sensor issue)
    Nikon D700
    Sigma 70-200 F2.8
    Sigma 85mm F1.4
    Sigma 15-30 F3.5 - 4.5



    http://www.philipduartephotography.com

    "It's better to be hurt by the truth than comforted by a lie"

  4. #4
    Join Date
    Aug 2006
    Location
    Chicago, IL USA
    Posts
    935
    The shot above was shot at 12mm F/4.5. I know reviews say this lens is soft at large apertures, but if the lens is sharp everywhere else but the left hand side, (to me) that its an issue worthy of having Nikon take a look at. If the whole image had a general softness to it, I would find it more acceptable and probably not throw a stink. But its just really annoying to have the left side of the image be "unusable", ya know.

    Here's another shot at 12mm. This one is much better, but it is also shot at F/8. The left side is still slightly less sharp than the right hand side but it is much better than the first one.
    Nikon D300 | MB-D10 | Nikkor 12-24/4 | Nikkor 50/1.8 | Nikkor 70-200/2.8 VRI | Sigma 18-50/2.8 | SB-800 | SB-80DX (x4) | Radiopopper JrX Studio |

  5. #5
    Join Date
    Aug 2006
    Location
    Chicago, IL USA
    Posts
    935
    Quote Originally Posted by herc182 View Post
    hmm, it does seem blurry. Does this happen at all focal lengths and apertures?
    I really need to do a much more extensive test with this lens, but I think its fairly safe to assume that the wider I go, and the larger the aperture, the more susceptible this lens is to having this problem. As I mentioned above, if the problem was a general "softness" I could live with that. A little unsharpen mask could fix that. But this looks more like a lens alignment issue. It has a strange blurry pattern to it. Like a really bad bokeh effect.

    oh, and does it happen with other lenses (therefore ruling out a sensor issue)
    This only happens with this lens. All my other lenses are very sharp across the entire image. This one just happens to have a couple problems at times.
    Nikon D300 | MB-D10 | Nikkor 12-24/4 | Nikkor 50/1.8 | Nikkor 70-200/2.8 VRI | Sigma 18-50/2.8 | SB-800 | SB-80DX (x4) | Radiopopper JrX Studio |

  6. #6
    Join Date
    Aug 2004
    Location
    Northern Colorado, USA
    Posts
    2,225
    It's hard to say. As Sam suggested, you want to test the lens on a single, detailed, focal plane (Brick wall test). That will tell you if there is an alignment problem. What you are describing above could be simply shallow depth of field issues, and the items that seem out of focus are simply not in the valid DOF to appear sharp. The wider the aperture, the shallower your DOF, and therefore, the more pronounced the issue will be.

    Shoot a brick wall (or similarly detailed surface) straight on at f4. That will tell you what you need to know.
    Eric Lund
    Nikon D200
    Nikkors: 17-55mm f2.8, 18-200mm f3.5-f4.5 VR, 70-300mm f4.5-5.6 VR, 35mm f2, 50mm f1.8, 55mm f2.8 AI-S micro, 105mm f2.8 VR micro
    Other Lenses: Tokina 12-24 f4, Tamron 75-300mm f4-5.6 LD macro
    Stuff: Nikon SB800, Nikon MBD200, Gitzo 1327 Tripod w/RRS BH-55LR Ballhead, Sekonic L-358 meter

  7. #7
    Join Date
    Aug 2006
    Location
    Chicago, IL USA
    Posts
    935
    I will try a few brick wall shots, but in most of the "testings" Ive done, everything looks good. Its real world shots where this problem exists. As you can see in the first shot, the ladder and the doors are on the same plane. The doors are sharp and the ladder is not. The ground at the very bottom of the photo is sharp, and the background is equally as "sharp" (I didn't use a lot of USM as Ive been accused of over sharpening my images).

    The only part that is not good is the left side.

    Let me take some brick wall shots at lunch and I will post up a couple of those tests.
    Nikon D300 | MB-D10 | Nikkor 12-24/4 | Nikkor 50/1.8 | Nikkor 70-200/2.8 VRI | Sigma 18-50/2.8 | SB-800 | SB-80DX (x4) | Radiopopper JrX Studio |

  8. #8
    Join Date
    Aug 2006
    Location
    Chicago, IL USA
    Posts
    935

    WARNING!!! Boring photos ahead!

    Okay. I took some brick wall test shots. Shots are as follows: 12mm F/4, F/8, F/16; 24mm F/4, F/8, F/16
    Last edited by VTEC_EATER; 12-15-2008 at 12:24 PM.
    Nikon D300 | MB-D10 | Nikkor 12-24/4 | Nikkor 50/1.8 | Nikkor 70-200/2.8 VRI | Sigma 18-50/2.8 | SB-800 | SB-80DX (x4) | Radiopopper JrX Studio |

  9. #9
    Join Date
    Aug 2006
    Location
    Chicago, IL USA
    Posts
    935
    Now, the brick wall tests are showing softness on the right side, not the left. All of my real world shots have the softness on the left.

    Overall, I'm not disappointed with the image quality in the brick wall tests, but many of my real world shots are ruined by what you see in post #1.

    Like I said, its totally sporadic when it happens. Some days its perfect, others it is not.
    Nikon D300 | MB-D10 | Nikkor 12-24/4 | Nikkor 50/1.8 | Nikkor 70-200/2.8 VRI | Sigma 18-50/2.8 | SB-800 | SB-80DX (x4) | Radiopopper JrX Studio |

  10. #10
    Join Date
    Jun 2007
    Location
    Dubai, UAE
    Posts
    2,907
    send it in...cause it does seem messed up!!!
    Film
    Nikon EM, Series E lenses 50mm f1.8|28mm f1.8|100mm f2.8, Sigma 80-200mm f4.5-5.6
    Minolta Riva 100AF, Sinpo PQ-3, Olympus mju-III wide 100, Yashica 635
    Digital
    Sony cybershot W90, cybershot T90
    Canon A720i|400D|7D|5DMKII|85mm f1.8|24-105mm f4|135mm f2|40mm f2.8|430EX II*2|BG-E3|BG-E7
    Sigma 24mm f1.8|50mm f2.8|105mm f2.8 Samyang 8mm fisheye
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