I shoot insects - damselflies, hoverflies etc - in the field. So GG focussing is not an option. I need the focal plane shutter to easily use my enlarger lenses. The hat-on-lens trick will scare my subjects away and I cannot afford more than a couple of seconds of exposure in the field on most days. Any slower and I'll use flash.
Originally Posted by bennoj
As for vibrations, most of the apparent vibration seems to come from the second curtain on my F3 (which has a prodigious "thwack" sound) and hence is irrelevant. Also for relatively long exposures - a second or more - the vibration issues become irrelevant.