My Stackshot is set to Auto-Dist with a stepsize of 3 micrometers. When I start the stack, I can clearly see that the travel-distance between the first and second photo is always *a lot* bigger than between all the other photos. For me, it is annoying and I have the feeling that you "miss" a lot of information that is between the first two photos. Is this normal?
Here is an example of the first four jpeg's of a stack directly from the camera:
photo 1: http://bars.rug.nl/status/nl/026136f94c8e1b61
photo 2: http://bars.rug.nl/status/nl/c8673b44e1b1d193
photo 3: http://bars.rug.nl/status/nl/679e368c4069513b
photo 4: http://bars.rug.nl/status/nl/826857ec0ea786ba
Stackshot Auto-Dist, first step too big, is it normal?
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nielsgeode
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rjlittlefield
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It sounds to me like 1) you are starting your stack with a reversal of direction, and 2) you have a "backlash" setting in the controller that is larger than your physical device.
See the discussion at http://zerenesystems.com/cms/stacker/do ... t/backlash for methods to determine an accurate value for backlash.
Even better, eliminate backlash as an issue entirely by manually running the StackShot from its end position back to its start position and then somewhat beyond start, before telling it to begin shooting the stack. This will force the rail to take up all the backlash in the first move before it starts shooting.
--Rik
See the discussion at http://zerenesystems.com/cms/stacker/do ... t/backlash for methods to determine an accurate value for backlash.
Even better, eliminate backlash as an issue entirely by manually running the StackShot from its end position back to its start position and then somewhat beyond start, before telling it to begin shooting the stack. This will force the rail to take up all the backlash in the first move before it starts shooting.
--Rik