![]() ![]() Helicon focus multiple instance full#Don't try to get full DOF coverage, retaining some very near/far out-of-focus (OOF) areas will help to convey the 3D sensation, and reduce stacking artifacts.įocus stacking in Helicon Focus is pretty straightforward. I use a macro focusing rail for general focus position, and the lens for micro adjustments (Helicon Focus will adjust for the magnification variation due to entry pupil differences). ![]() Take small focus steps, visually stepping from focus position to focus position (DOF is practically non-existing at high magnifications, so the wide-open f/2.8 viewfinder preview is a good guideline). Switching it on/off with the shutter release button helps to speed up operations if the subject can change position. I've set the MR-24s C.Fn 9 to allow the focusing lamp to be set with the shutter release button, because the viewfinder gets very dark with large magnification factors. Check for R/G/B channel clipping on a white subject for a given magnification (magnification 'M' will change fixed exposure as (M+1)^2, so significantly at anything above 1:1).įocus the individual focal plane images in small incremental steps, usually going from closest to most distant. I can check my camera's R/G/B histograms on the camera LCD for clipping, you may need to inspect the histograms in an image editor if your camera doesn't allow to do that. I also prefer to set a different exposure between the A and B flash heads, to add a more 3D look to the subject. Sometimes the ETTL will be triggered to significantly change exposure (which often works fine for handheld outdoor situations) due to subject reflection variations, but I prefer to standardize exposure for focus stacking (even though Helicon Focus can adjust for exposure differences). ![]() Helicon focus multiple instance manual#Just shoot an aperture sequence of a detailed subject, from f/16 to lower f-numbers, and choose the best one in the focus plane (disregard DOF, just go for focus plane quality).Īs for exposure, and since you also have the MT-24EX Macro twin lite flash, I decided to go for manual setting rather than ETTL in the case of indoor (no wind motion!) tripod scenarios. a smaller sensel pitch will most likely lead to a narrower optimal aperture. Other lens/camera copies/combinations may/will lead to somewhat different numbers. I've tested the residual aberration/diffraction effects of my 65mm lens on my 1Ds Mark II, and decided that f/8 (only marginally better than f/9) provides the best single image resolution. Afterall, GIGO (garbage-in-garbage-out) still rules. First and foremost, make sure that the individual image capture quality is optimal. ![]()
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