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Old Aug 8, 2007, 10:04 PM   #1
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shot in macro mode, AF and as close as I can
but the fly is not very clear.
Is it the limit of the 18-55mm lense?



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Old Aug 8, 2007, 10:25 PM   #2
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In the picture, it appears (to me) the the torso and some of the fly's legs are very crisp and in focus, but towards either end of this little guy, things get a bit blurry. That blur is caused by a thin DOF, the EXIF was stripped so I can't see the camera settings, but I am guessing it was shot at ~55mm with a pretty wide aperture with an f-number no higher than f8.So, to me, it appears that you have reached the limits due to a thin DOF, not the lens. When shooting macro, it's best to stop the lens down as far as possible to keep as much of your subject in focus as you can.
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Old Aug 8, 2007, 10:51 PM   #3
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The kit lens does OK for most things but it is limited when it comes to macro. While you'd probably get a better picture with a smaller aperture and a tripod and/or external flash (did you use flash?), a real macro lens is SO much easier to use!
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Old Aug 9, 2007, 9:36 PM   #4
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thanks for the comments inneyeseakay & mtngal
exif is FL=55mm A = F13 Shutter speed = 1/60
when I shot with macro set up the aperture is F13
but when I change to AV mode the aperture is F8 and I can change its value
so stop the lense down meaning change the aperture to F9.5 or F6.7?
thanks
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Old Aug 9, 2007, 9:44 PM   #5
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Actually, stopping the lens down means to make the aperture opening smaller, you would do this by going to a higher f-number (14,16,18,20...)

Here are some examples of DOF. First, this shot was taken with the lens "wide-open" (meaning, the lowest possible f-number for the particular lens)
---Pentax *istDS, Tamron XR 28-200mmat 28mm f/3.8---
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Old Aug 11, 2007, 10:43 AM   #6
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Now, this shot was taken with the lens "completely stopped down" (meaning, thehighest possible f-number for the particular lens)
---Pentax *istDS, Tamron XR 28-200mmat 28mm f/22---
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Old Aug 12, 2007, 3:22 AM   #7
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thanks for theillustrated explanation inneyeseekay.
somehow I got my F number in reverse?
this one is F32

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Old Aug 12, 2007, 3:32 AM   #8
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and this one is F/5.6
both pics were taken with Sigma 70-300 macro
with focal lenth 300mm
shutter speed 1/180sec
thanks

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