from close to infinity), even for the exact same body (EOS 60D) and lens (EF-S 10-22mm) I was dissapointed to get different numbers at almost every attempt.
Helicon remote with 6d remote video full#
As my first objective was to simply count the number of steps of a full throw (i.e. At least, that was my observation when I was trying to automate landscape focus stacking with Magic Lantern. The battery level indeed seems to have an impact on the size of an individual focussing step. The question of Rowland Shaw is a pertinent one. So my question is, what factors determine the shape of these functions? Do I have explicitly measure all combinations of cameras and lenes? In the same time, both cameras did approximately the same with 50mm lens. For example, I expected that different leses will act the same for different cameras, but as you can see from the plot, it is not true.Ĭanon 5D Mark III did the same for two different 100mm and 100mm(L) lenses, but Canon 6D have different results for these lenses. We can ship the following tables with our software, but we want to reduce their number. Here 100mm stands for "Canon EF 100mm f/2.8 Macro USM", 100mm(L) stands for "Canon EF 100mm f/2.8L Macro IS USM". Here is the plot for two cameras and three lenses: We determined the size of the step depending on the current focus distance. We've done some tests for different cameras and lenses. And we need to know, how far will focus plane move when user presses a > button to move focus on medium step. We know that we are focused on object, say, 400mm far from the camera. I suppose there is no robust way to determine the exact distance the focus plane is moved when one of these buttons are pressed.īut in our software, we really need to know at least an estimate. Because hardware of a lens simply doesn't provide the corresponding information. This is how it looks in Canon EOS utility:Īs long as I know, there is no way to find out the exact position of the focus plane using Canon SDK.
Helicon remote with 6d remote video software#
When a DSLR camera is used for remote shooting, corresponding software usually provides very simple way to change focus position: small, medium and large steps forward or backward.
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