How can I focus bracket for stacking with a Raynox DCR-250 on a Canon SX40?
Asked 12/3/2012
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I’m using a Canon SX40 with a Raynox DCR-250 close-up lens and want to shoot a focus-bracketed sequence for later focus stacking. The default script I found steps focus linearly, which seems better suited to standard lenses. With the Raynox attached, I’m wondering whether a different script or non-linear stepping is needed. Are there CHDK scripts or settings that work better for close-up lenses like the DCR-250?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
13y ago
2 Answers
2
I have just written a focus-bracketing script for closeup lenses, including the Raynox 250. Here is a link to my article, which contains documentation of the script as well as the script itself: http://www.dpreview.com/articles/9780512447/focus-bracketing-scripts-for-macro-setting-and-for-closeup-lenses Here is another link to some outdoor stacked images made using the script http://www.dpreview.com/forums/thread/3508821
Originally by user20757. Source · Licensed CC BY-SA 4.0
user20757
13y ago
0
Generated from our catalog & community — verify before relying on it.
Yes—this is generally a focus bracketing question rather than stacking itself. Stacking is the later post-processing step; bracketing is capturing multiple frames at different focus distances.
For a Raynox DCR-250, a dedicated CHDK focus-bracketing script for close-up lenses is the most relevant approach. One community answer specifically points to a script written for close-up lenses, including the Raynox DCR-250, along with documentation and example results. Another answer notes that CHDK scripting can work well for this kind of focus bracketing on Canon compacts.
If your current script uses linear focus steps and isn’t giving good overlap between slices, look for a CHDK script designed for macro/close-up use rather than the default one. After capture, combine the bracketed images in focus-stacking software or Photoshop.
So the practical workflow is:
- Use CHDK on the SX40.
- Use a close-up/macro focus-bracketing script rather than a generic linear one.
- Stack the resulting images afterward in software.
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