I am having problems when I set hyperfocal distance on the SX30. I am using almost identical scripts on SX30 and SX220HS, and I only have this issue on the SX30. I set focus to the hyperfocal distance at zoom step 0, and after maybe one in 5 power cycles (autocycles every 4 hrs) the focus sets to minimum instead. I had this problem at other zoom steps too.
For example images you can see here (timelapse on a river):
http://www.flickr.com/photos/usgs_elwhacams/sets/72157631807258313/(power cycle triggers uploads from the eye-fi card over a mifi 2200).
I think the problem is here:
function pre_focus()
local p = get_prop(props.FOCUS_MODE)
if p == 1 then
print "Manual focus (MF) found"
else
while p ~= 1 do
sleep(500)
click("left")
click("right")
click("set")
sleep(500)
p = get_prop(props.FOCUS_MODE)
end
print "Focus set to manual (MF)"
end
local focused = false
hyFo = get_dofinfo().hyp_dist
print("focusing to hyperfocal distance")
set_focus(hyFo)
focused = true
return focusedBut I attached the whole script in case anyone is curious.
CAUTION. THIS SCRIPT WILL DELETE IMAGE FILES IF MEMORY CARD HAS < 512 MB FREE SPACE.I am heading to the site to try to add a sleep(1000) between
hyFo = get_dofinfo().hyp_dist
and
set_focus(hyFo) but I would love to know how/if I can just focus to infinity instead.
I think infinity on the SX30 needs to be set to a large value. According to (
this post) by Philmoz, Infinity = 4294967295 (0xFFFFFFFF), and CHDK treats the value as a signed int so displays it as -1.
Does that mean that I would say set_focus(4294967295) or set_focus(-1) or set_focus(0xFFFFFFFF)?
