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View Full Version : 100m 2.8 question?

kouasupra
10th of June 2009 (Wed), 08:23
I have this len in my case for a while now. It's one of my sharpest len that I have (not to say my L lens aren't sharp). I have a set of kenko tubes on it also to improve my magnification on macro shot (bugs, flowers). Now what I don't understand is how people are able to get so close without narrowing the DOF. Everytime I get close my DOF would get so shallow it makes me uncomfortable to shoot my subject. I've tired everything from F4 to F16, but it would seem to be too dark, or too shallow in dept. I normally turn off the AF and use manual and rock back and forth until I get a sharp image. I've seen some 100mm macro pictures in here that looks like it's taken with a mp-e 65? Am I doing something wrong here?
dragos4h
10th of June 2009 (Wed), 09:48
I think you should think before shooting how you wanna frame the subject so that you will take advantage of the narrow DOF (or focus stack). But let's see what the other more experienced members have to say about this
LordV
10th of June 2009 (Wed), 13:41
Using the 100mm with ext tubes from 1:1 to 2:1 magnification really will require flash in most circumstances to get reasonable DOF with the aperture around F11. Even then the DOF will be fairly shallow. Remember many people here use focus stacking to increase the DOF.

Brian V.
kouasupra
11th of June 2009 (Thu), 03:25
Using the 100mm with ext tubes from 1:1 to 2:1 magnification really will require flash in most circumstances to get reasonable DOF with the aperture around F11. Even then the DOF will be fairly shallow. Remember many people here use focus stacking to increase the DOF.

Brian V.

Brian,

Please explain little more about focus stacking as I am new to macro photography.
LordV
12th of June 2009 (Fri), 02:02
Brian,

Please explain little more about focus stacking as I am new to macro photography.


Tutorial here on focus stacking http://www.wonderfulphotos.com/articles/macro/focus_stacking/

However you should only be thinking about this once you have got used to shooting macro.
Brian V.
kouasupra
13th of June 2009 (Sat), 11:36
Tutorial here on focus stacking http://www.wonderfulphotos.com/articles/macro/focus_stacking/

However you should only be thinking about this once you have got used to shooting macro.
Brian V.

Thank you Brian, I've always love your work!.
Warl0rd
13th of June 2009 (Sat), 16:29
with ET it would be better to turn off AF, set lens to 1:1 and use your body to get the subject into focus, as soon as you see it focus "click", then try to hover over it and keep shooting until your flash runs out (yes you need a flash for ET + f/16)