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Cabbaflage

By Robert_Malcolm  
The beauty of fresh food.

Tags: Red Sliced Cabbage Cross section

Voters: taggart, VIKI, woolybill1 and 1 more


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Comments


taggart Plus
11 46 12 United States
22 Jan 2011 11:54PM
Love the abstract design on the back slice!
JEnnn

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woolybill1 Plus
9 22 67 United Kingdom
23 Jan 2011 9:56AM
Excellent title, too Smile
Bill
DRicherby 7 269 725 United Kingdom
23 Jan 2011 4:34PM
Love the title! Red cabbage makes for an excellent still-life when presented like this. I do think you need more depth of field, though, to get everything sharp. Out-of-focus foregrounds rarely work, especially when it's something we're interested in looking at. We're used to the idea of something being too far away to see clearly but 'too close to see clearly' is something that people with normal vision only experience for things right under their noses.

I reckon you were shooting from about six feet away and, at that distance, f/22 will give you about seven inches of depth of field (according to DOFMaster ), which should be just about enough. Bear in mind that, at this sort of distance, the sharp region is split roughly 50/50 in front of and behind the point of focus so you'll need to focus in front of the cut face of the cabbage to get everything sharp. The alternative is to use a technique called focus-stacking -- take a selection of photographs at wider aperture (say, f/8) each focused on different points and combine the sharp parts of each in Photoshop or specialist software. This is more work but does let you shoot at the lens's optimal aperture -- narrow apertures like f/22 cause a slight decrease in sharpness because of diffraction.

Quick question: why ISO-400? With a one-second exposure, you were obviously on a tripod so a 4-second exposure at ISO-100 would give you the same shot but with less noise (i.e., more detail).
23 Jan 2011 5:16PM
Pretty simple, really.

I wanted the foreground OoF - I have plenty of other apertures in the other 20 or so shots.

ISO400 means less time in-camera processing. If I have 150 shots to take in a day (today) then saving a few seconds on each is valuable.

None of these is going to be printed at larger than A4, so the amount of detail is perfectly acceptable. Using a full-frame sensor with in-camera noise processing also means that I don't really have to worry about squittly things like 'detail' on shots within the normal ISO range.

I have asked for one shot to be critiqued and have now been given three. If I have any more without request I shall just stop posting. It's a photograph. I like it. I thought someone else might too.

Enough?

Oh, yes. 6ft? Go look up DOFMaster for 24 inches, then tell me what aperture I need for DoF of 7 inches with a very crispy cut open face of cabbage. In my head it's probably about f146.
DRicherby 7 269 725 United Kingdom
23 Jan 2011 5:34PM
Please note that all photos posted are open to critique. Since you've asked me not to, I'll try to remember but it was only after you replied that I remembered I'd commented on your photos before.

I'm surprised you were as close as two feet as I had a look through a 150mm-equivalent lens and 2ft doesn't seem to provide enough field of view. 6ft does look like rather a poor estimate, though, and yes, you would need an absurdly narrow aperture to get everything sharp at only a couplefew feet from the subject.
23 Jan 2011 8:21PM
Field of view and 'enough' usually relies on the size of the subject as well as distance to object and focal length. Why not have a try at my latest upload - be careful, it's tricky.

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