Blurring in image

botty.1963

botty.1963

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Name
Steve
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Hi all. Over the last few weeks I have noticed quality issues on some of my images, it's not something I have seen before. The lens is a Canon 24-105 L-Series version 1. The issue is intermittent, occurs when I use the same settings, and only affects a part of the image. I have attached one of my images, ignore the general quality as it is a RAW that I converted to JPG and uploaded to Facebook, and I have just attached the copy downloaded from Facebook as I am not on my PC at the moment to attach the original.

However, it does demonstrate the issue. If you look at the bottom of the picture it is very blurred, and gives the impression that it may be a DOF issue, however, it also happens on images where there is a very shallow DOF; again intermittent. I haven't noticed this issue with other lenses such as the 70-200 L-Series I was using yesterday.

I have the AF on and IS switched on, it sort of looks to me like something the IS would do to an image if using a tripod, but that I would assume would be across the full image if it was being caused by the IS. Any suggestions would be helpful.
 

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It may be worth taking some shots with it mounted on a tripod using a high shutter speed and turning the ISO off to get the best good sharp baseline image. I have had this kind of problem before when a lens had some rough handling and one of the elements was de-centred. If your tripod shots look OK it could be a problem with your IS.
 
I used to have the 24-105 Mki which I later traded in for a Mkii. I had no problems with either lens in and always leave the IS on including when using a tripod. Canon state that there is no need to turn the IS off and this happens automatically if the camera movement is very low such as when mounted on a tripod. I would be interested to know where the point of focus was. You can tell by viewing the Raw file on the camera screen or in Canon's DPP. Compare this to where you wanted the point of focus to be.

Dave
 
The issue is that it only started a few weeks ago. I went on a hike and noticed a few of the images with this 'blur' so assumed that I had done something different, but have then noticed it a number of times since then with the same lens. When I am out hiking I just have the camera set to AV mode at f7.1 so that I can just shoot as I am hiking. I also have spot focus as I like to control exactly where the point of focus is. So nothing settings wise has changed, just this intermittent issue which just looks a little like the area of the photo has been 'shaken'.
 
i can provide no help to your question, but i just came back from there yesterday after spending a week there, we stayed just down the hill, it is the yellow ish house behind the old church in your photo
 
I had an issue like this with one of my Olympus lenses and it was indeed a fault. I want to say they said it was a floating element issue but that doesn’t sound right. If I can remember what it was I’ll let you know.

That hill’s a fair old climb isn’t it ;)
 
Is that Robin Hood's Bay? Was there about 8 years ago
 
The image is too small to tell but is symptomatic of two things; either a loose lens mount or a failing IS that's out of alignment.
 
burleyviking said:
i can provide no help to your question, but i just came back from there yesterday after spending a week there, we stayed just down the hill, it is the yellow ish house behind the old church in your photo
Click to expand...
Hope you had a great week, we just popped there for a few hours and just enjoyed sitting by the sea.
 
I have just added a JPG of another photo as an example. If you look at the garden area that is an example of this intermittent issue.
 

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Have you cleaned the Autos Focus sensors? not the main sensor.
watch the whole of this video, sorted out my problem of OOF. I used a round swab with a foam tip,


 
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botty.1963 said:
I have just added a JPG of another photo as an example. If you look at the garden area that is an example of this intermittent issue.
Click to expand...
It looks to me like everything around the garden area is sharper; L/R-F/B, and it's also affecting the stone wall. I can't think of anything to explain that type of effect, especially because it is random. Does it seem to be fairly consistent in location? Have you cleaned the lens/sensor?
 
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