: Question: I haven't figured out why the linkage doesn't seem
: to allow for foccusing at max aperature and then stopping
: down at exposure...DOV preview is disabled on the lens,
: and whatever f-stop you set the lens to is where the lens "stays"
: at. I guess I could set the f-stop at max, focus, and then set the
: f-stop at the one needed for the shot, but the slightest bump would
: throw everything off I assume...
This is how Oly's manual extension tubes work too. If the bellows and tripod
are sturdy enough it should be possible to turn the aperture ring w/o
changing any setting. If you do want to keep the aperture ring stopped down
while focusing, you need the right screen (1-12 or 1-11). You need such a
screen anyway if you want to go at much higher magnifications than 1:1. The
varimagnifinder is also a good thing to have in combination with cross-hairs
air image focusing.
hnz
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