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PostPosted: Thu Mar 17, 2011 2:12 pm 
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I have just been looking at a few images, and there seem to be a few focussing and aperture issues.

Image 1 - F/5.6 1/320 ISO 100
Image 2 - F/5.6 1/320 ISO 100
Image 3 - F/5.6 1/320 ISO 100

I used manual mode, using a minimum shutter speed of the focal lengh of my lens, with plenty of head room. I used ISO 100 because it was a sunny day, a predicted aperture of F/5.6 because I thought that it was about right. The white balance was set to the sun setting.

I used the particular shutter speed that I did to get the exposure bar level at 0, correctly exposed. All the shots were taken hand held, outputting to a 100% JPG recorded in camera, which was reduced to 640x480 for upload purposes.

The auto focus setting is set to "one shot", which I don't know much about.

Some of the images are not quite focussed, and none are really that sharp.

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Last edited by Canon 500D on Sun Mar 20, 2011 11:15 pm, edited 1 time in total.

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PostPosted: Thu Mar 17, 2011 2:27 pm 
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Which focus point did you use? Did you move after you locked focus?

It's hard to say from the small photos if everything is sharp, but the 2nd photo does look blurred. Could you put some larger ones up? like, 800px on the long side even...

Photo 1 & 3 don't look bad in terms of focus from the image sizes you've linked to here, but #2 looks like your focal plane shifted in front of the horses (toward the camera).

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PostPosted: Thu Mar 17, 2011 2:38 pm 
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I am not sure which one this is, I should really be more organised.

Once the focus was locked, I did not really move about much.

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PostPosted: Thu Mar 17, 2011 2:41 pm 
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Remember the kitlens isnt that sharp at the maxima of the lens (18 and 55mm).

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Ruben

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PostPosted: Thu Mar 17, 2011 3:29 pm 
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That larger one appears to be Image #1 in the first post, and it honestly doesn't look that unsharp or out of focus at all. In my opinion, technically-speaking it's not a bad photo at all - well exposed and the subject is well in focus. I guess if you were after a background that was in focus as well you could have shot at f/8 and bumped up to ISO 200 or f/11 and ISO 400, but that's up to you.

I'd be interested to know what #2 looks like in a larger size though, because it really does look as though the focus has shifted toward the camera.

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PostPosted: Thu Mar 17, 2011 3:58 pm 
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Last edited by Canon 500D on Sun Mar 20, 2011 11:14 pm, edited 1 time in total.

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PostPosted: Thu Mar 17, 2011 4:04 pm 
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The 3rd one isnt focused correctly. Did you use Live View? That could cause the problem, as Live View on most DSLRs is meant to use on tripods.

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Ruben

Panasonic DMC-FZ18, Panasonic DMC-FZ28, Canon G5, Canon 350D, Canon 50D + BG-E2N
Tamron 17-50 2.8, Canon EF 70-200mm f/4L USM,
Canon 18-55 II plus lots of Minolta MD/M42 lenses and bodies


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PostPosted: Thu Mar 17, 2011 5:13 pm 
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The focus in original #2, large-size #3 is at the bottom of the frame. You can tell this because the trees are more out of focus than in #1/3 in the original or #1/2 in the large size, and the grass at the bottom is getting sharper.

Were you using a manually-selected AF point or were you letting the camera choose? Were you re-focusing between shots? That (re-focusing between shutter-presses) is why I choose to use back-button focusing as it lets me lock focus independently of shooting. Possibly something to consider?

Interesting to note, the EXIF says the blurry shot was taken 2 seconds before the two other in-focus ones, while the two non-blurry ones were taken one second apart... Maybe a re-focus in between fixed the mis-focus?

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PostPosted: Thu Mar 17, 2011 6:32 pm 
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I may have re focussed, but this should not be an issue atall, unless you are comparing the images to each other. The settings were identical.

I was using the camera hand held, and did not shoot in live view.

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