Very impressive! What beautiful creatures.

According to medisco.eu, “Helicon FB Tube is an extension tube with integrated electronic microcontroller designed to enable automated focus bracketing in single or continuous shooting modes. Mounted on the camera in the same way as a usual macro extension tube, Helicon FB Tube automatically shifts the focus by one step with each shot thus producing a stack of images of unlimited length that can be rendered into a fully-focused image.”

Oh I ALWAYS used Polaroid back in the day when shooting with a 4x5 or 8x10. I find the SLR much simpler to use and therefor less necessary. John's point about closed eyes though is well taken.

A. BUT -what is it you are looking at? I almost never look at the image but rather I have my display setup to show me the RGB Histograms. That is something I care to look at to see if I need to use EV to make corrections. I guess I feel that, I know what the image looks like as I pointed the camera at it.