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Focus stacking
I'm finding that I'm not getting as much front-to-back sharpness on my jewellery photos as I'd like. Does anyone use focus stacking, and what package do you prefer?
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Never tried that Peter, but I do get good depth of field results in close ups,when using my Nikon DSLR fitted with a Nikkor 60mm Micro set at f32.
James
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I'm using a Nikkor 105mm micro - at f40, the sharpness is fantastic, but the depth of field is minimal. One of the dof calculators reckons it's no more than 1-2mm... My older 55mm micro Nikkor has no electronics, so metering is a bit more of a nuisance (take the shot, study the histogram, adjust accordingly).
I've been trying Helicon Focus; so far I think it is giving me better results than Zerene stacker. It seems a faff having a laptop tethered to the camera, but it does make capturing the focus stack relatively painless.
It's also cheaper than buying another lens!
Last edited by ps_bond; 06-01-2013 at 01:26 PM.
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hello there, i never managed to get hands on, but i did some research as is something would like to learn. Zerene Stacker seem a good package used from professional photographer. zerenesystems.com/cms/home
Tony
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When I said Helicon Focus is giving me better results than Zerene Stacker, I mean that a) I've been experimenting with both and b) I've been analysing the resulting output.
Helicon Focus gives a result I find preferable on specular highlights; it also results in better definition on highly reflective surfaces than Zerene. Results may differ for different subject material.
I'll try and find time to resize & post results from the 2, along with the f40 shot. They're just messing, so the lighting is ambient rather than studio.
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I have a basic Canon EOS1100D, and the lens is 18-55mm. When set on 'Av' (aperture priority) and the f. number very high (up to f22) there is no problem with depth of focus.
There is also a macro setting which is totally automatic, so I never use it for jewellery. Am I misunderstanding the question?
Last edited by Dennis; 06-01-2013 at 02:42 PM.
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The problem's partly of my own making: The kit lens that came with my Nikon won't focus as close as I want/need. The longer zoom I have primarily for sports use focusses even further away... So I bought a Nikkor 105mm to supplement the 55mm I have. The combination of the longer lens (and the fact that with a partial-frame sensor there's a pretend 1.5x magnification factor) results in fantastic sharpness at high levels of magnification, but a very small dof even with the aperture stopped down.
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I was about to upload the stacked files, only to notice that the one created by Zerene Stacker isn't all that big - it's not quite 270kB, while the one generated by Helicon is around 1.5MB. So a loss of detail is to be expected... I'll have to go back in to see if I can persuade it to generate a larger file.
f40 shot:
Using Helicon Focus:
There's been no other manipulation, so the resulting effective exposures differ. Also interesting to note how much Helicon has resized things - although this lens "breathes" and the image size changes with changes in focus. Oh, the stack shot for Helicon was all done at f5.6.
Another thought - manual focus confirmation isn't great on this camera (I miss the prism screens of the old SLRs); the only way to get decent focus confirmation is to switch it to live mode, then zoom in on an area of interest.
Last edited by ps_bond; 07-01-2013 at 10:50 AM.
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Have you tried taking the photo using less zoom then cropping the image?
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Prime lens
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