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AB22 Easy Tiger

AB22 Easy Tiger

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Name
Graeme
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I'm a mod on a football message board and have managed to persuade them to hold a photography competition every month. One of the posters came up with this:
Roger said:
I am puzzled. In pursuit of my photo for this month's competition, I have been trying to take some photos of mould growing. 1st attempt was this
picture.php

That was taken with an aperture of f/3.2 (and shutter speed of 0.3 sec) I wanted to increase the depth of field from that photo so was playing with a smaller aperture and longer exposure. But every time I did this I got what appeared to be motion blur. I have never had this problem before and everything was fairly solid on the tripod (I checked this several times) . It was indoors, so no wind and I had the camera mirror locked up and activated by self-timer. The photo below was f/18 and shutter speed of 13 seconds, so yes plenty time for movement/vibrations but to that extent? and why no sign at all on the 0.3 second photo?
picture.php

It was a coffee puck on a bench so it shouldn't have been going anywhere. The bench was on a concrete floor

Puzzling me this one and I will have to have another try. Its not like the 1st photo was a "fast" shutter speed and the results were repeatable.
Click to expand...

Any idea what's happening?
 
was it dslr, could be mirror vibration :shrug:
 
Oh b****r, I can see the images, can no one else?

The mirror was locked up, by the way.

Image 1:
picture.php

Image 2:
picture.php


The same thing happened every time he tried it.
 
what surface was the tripod sitting
i am thinking vibration from suspended flooring....hard to feel through your feet

tie a string around the tripod head and suspend a heavy weight from it...this will push the legs down and dampen any vibrations

cant you get the pics to load
 
Wow, there's a lot of movement going on in that second photo. As he reckons the tripod is solid, there is no chance of the subject moving and he has locked the mirror up, I would have said the movement comes from when he presses the shutter, but he's using the timer!

Also though about the floor, and whether his movement during exposure would have been an influence, but he says it's a concrete floor.

Can't think of much else to be honest, but it does look like movement rather than diffraction issues.
 
He tells me he was very careful not to move anything, and the results were repeatable - the same thing happened every time he tried it.
 
The movement looks very smooth, has he tightened up his tripod head up tight. If it was loose it would give exactly the same result every time.
 
If he tried a diff pic at a diff place do he get a good pic or still blurred?
 
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