On 7/12/2023 7:59 PM, Larry Colen wrote:
On Jul 12, 2023, at 4:47 PM, John Sessoms <jsessoms...@nc.rr.com> wrote:
I had my K20D converted to Amplified Color (665nm) IR.
Had my first chance to test it out today. Didn't notice they'd reset the
default output to JPEG, so I'm going to have to make another test outing.
Yeah, that bit me when I took my K20 to burning man after having it repaired.
When I got home and started to process the photos I couldn't figure out why
they wouldn't adjust properly.
First thing I've noticed is it doesn't seem to work very well if it's not bright
sunlight. Test shots I took indoors don't show ANY image unless I boost the ISO way
high & use high exposure compensation.
So you have it blocking all visible light?
"IF" I understand what they did, they replaced the regular IR filter
with another filter that passes IR below 665nm so that I get visible
light PLUS the upper end of the IR spectrum ... ???
IR is supposed to be really good for harsh daylight (shooting in the middle of
the day), so I took it out from 1:00 to 3:00 today to photograph a field of
sunflowers that are just coming into bloom.
I had it at F8 using the SMC Pentax-DA 1:1.8 50mm lens it seems like everything
is really soft (out of focus?) except for stuff out on the horizon.
I've got to go out and make another test, but anyone got ideas?
You'll need to focus based on the live view, which is what the sensor sees,
either that or manually focus based ton the distance scale and the little red
dot that shows the IR focus point. The autofocus system focuses for the visual
spectrum, but IR focuses differently.
Hmmmm? The K20D has live view?
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