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johnh87955920
Participant
July 25, 2019
Question

Can some help me understand an Artifacts issue with this photograph

  • July 25, 2019
  • 3 replies
  • 1173 views

HiChateau d

Looking for constructive feedback on this photo that was rejected because artifact issue(grain/noise). Any information or incite you can provide would greatly be appreciated.  The picture was taken using a tripod at 3.0 sec at f4 ISO 320 some post processing in lightroom.

Thanks

John

This topic has been closed for replies.

3 replies

jacquelingphoto2017
Community Expert
jacquelingphoto2017Community Expert
Community Expert
July 26, 2019

Hi John,

The image has excessive grains, color fringing (cyan around the edges), and was also shaken during the shot. Even though the camera was mounted on a tripod, shaking sometimes takes place when pressing the shutter button. The best way to prevent this is to use a remote control, to take your shot(s) or to set the timer and take multiple shots.

Grains cannot be avoided, that is why post processing with a photo editor is necessary to make corrections, such as removing noise, artifact, correct white balance, etc. To find these issues you must examine your images at between 100 and 200% magnification. Then make the necessary corrections.

tagproducts_SG_STOCK-CONTRIBUTOR_i18nKeyHelppagetitle and Create better photos for Adobe Stock with 7 tips for success |  are helpful link that will help you to improve your submission.

Best wishes

JG

Ricky336
Community Expert
Ricky336Community Expert
Community Expert
July 25, 2019

I don't seem any camera movement myself. I think what Abambo pointed out is more to do with the lens refraction as it is only noticeable in the highlights and not camera movement or made of more than one photo. The issue I see here is luminance noise, and as you took this at ISO 320 it would give you this kind of result. Better if using a tripod to have a lower ISO - 100. You are using a time exposure after all. 3 sec is not so long either. It is better to have a low ISO for time exposures.

I think the white balance is fine.

Notice the 'grainy' appearance which is noticeable in the sky.

Abambo
Community Expert
AbamboCommunity Expert
Community Expert
July 25, 2019

No, definitively it's camera movement. You see it in the light parts because of the exposure of 3 secs and the increased sensitivity in that part of the picture. It looks like there was a slight movement to the tripod giving a double exposure.

ABAMBO | Hard- and Software Engineer | Photographer
    Ricky336
    Community Expert
    Ricky336Community Expert
    Community Expert
    July 25, 2019

    I disagree in this case. If it were camera shake then it would be consistent signs throughout the whole frame and there aren't.

    What you pointed out is more like chromatic aberration caused by the lights in this case and the pattern is consistent in the highlight areas. I see no actual signs of camera shake here.

    Abambo
    Community Expert
    AbamboCommunity Expert
    Community Expert
    July 25, 2019

    This excerpt is from 200% magnification. You probably build this from 2 or more pictures or the camera moved during the shoot. In addition you have a white balance problem and a noise problem.

    ABAMBO | Hard- and Software Engineer | Photographer
      Abambo
      Community Expert
      AbamboCommunity Expert
      Community Expert
      July 25, 2019

      Some very quick edits:

      I don't feel that it's perfect...but it shows how get more out of your pictures:

      Edited colour balance, except for the chateau. For the street, I brought down the exposure. With the raw file and more time invested it would have been more accurate. This does not address the artefacts in the picture. they are not correctable.

      ABAMBO | Hard- and Software Engineer | Photographer
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