> On Jul 12, 2023, at 7:06 PM, John Sessoms <jsessoms...@nc.rr.com> wrote: > > > > 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 ... ???
You *should* be able to get shots indoors just as you would with a standard camera. > >>> >>> 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? Hmmm, that’s an issue. Maybe take some test shots and look at the preview screen zoomed in. If you photograph under LED or fluorescent light there should be no IR. > > > -- > Vivere in aeternum aut mori conatur > > -- > This email has been checked for viruses by AVG antivirus software. > www.avg.com > -- > %(real_name)s Pentax-Discuss Mail List > To unsubscribe send an email to pdml-le...@pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- Larry Colen l...@red4est.com sent from ret13est -- %(real_name)s Pentax-Discuss Mail List To unsubscribe send an email to pdml-le...@pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
