I don't get this.
When you do focus stacking (several exposures each with a shallow DOF) and then blend them together, how does the software know what to take from each photo?
uOpt Goldmember  2,283 posts Likes: 3 Joined Jun 2009 Location: Boston, MA, USA More info | Nov 05, 2010 15:37 | #1 I don't get this. My imagine composition sucks. I need a heavier lens.
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GJim Goldmember  More info | Nov 05, 2010 16:14 | #2 Good question - I think it works on contrast between adjacent pixels; thus it helps to have images where there is quite a bit of difference between object and background. G'Jim c):{- ... 2x 50D (Both Gripped), 2x 7D (Both Gripped), 2x 5D Mk II (One gripped), 1x 60D, assorted glass (10-800mm), sundry accoutrements.
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Nov 05, 2010 16:55 | #3 Contrast would be what the camera AF does in the first place. Makes sense. My imagine composition sucks. I need a heavier lens.
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Nov 05, 2010 20:58 | #4 Software can also get confused and give some - interesting - results:  However (at least with Combine ZP that I use) its more than just contrast comparisions that goes on with focus stacking. You have to ensure that you've not clipped a single highlight or colour channel otherwise your nice exposed single slides will have the exposure added up and you'll get blown details in the final composite stack. You can also do focus stacking manually yourself by using layermasks and masking off the blurred areas from one shot to show its sharp zones over the original - however this takes ages and is very fiddly. Also I've found that focus stacking will add up the sharpness and detail as well - the resulting composites (when they work) are often fantastically sharp! Tools of the trade: Canon 400D, Canon 7D, Canon 70-200mm f2.8 IS L M2, Sigma 120-300mm f2.8 OS, Canon MPE 65mm f2.8 macro, Sigma 150mm f2.8 macro, Tamron 24-70mm f2.4, Sigma 70mm f2.8 macro, Sigma 8-16mm f4.5-5.6, Raynox DCR 250, loads of teleconverters and a flashy thingy too
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racketman Cream of the Crop  More info | Nov 12, 2010 15:56 | #5 impressive 36 image stack here: Toby
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 | x 1600 |
| y 1600 |
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