Re: IR Photography
Interesting. To me it is more of an art form than serious photography. Many moons ago I tried a couple of rolls of B/W IR film. Needed a special filter to block out visible light - made a slide on holder from thin cardboard. Exposures were around f8 from about 0.5 to 5 sec (pot luck!) which made a tripod mandatory - still have the very same tripod. Manual guesstimate timing on "B" with a cable release. Focusing was a nightmare because the filter was so dark I had to focus without the filter & then slide it in and adjust to the IR mark on my Supertak 55/2 (which I still have!). Pity I didn't think of Larry's sticky tape astro method to lock the focus. Only 2 or 3 shots out of the 48 were even on the verge of acceptability so that was the end of my adventure. Alan C On 13-Jul-23 04:59 AM, Larry Colen wrote: On Jul 12, 2023, at 7:06 PM, John Sessoms wrote: On 7/12/2023 7:59 PM, Larry Colen wrote: On Jul 12, 2023, at 4:47 PM, John Sessoms 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. H? 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 topdml-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 topdml-le...@pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- %(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.
Re: IR Photography
> On Jul 12, 2023, at 7:06 PM, John Sessoms wrote: > > > > On 7/12/2023 7:59 PM, Larry Colen wrote: >>> On Jul 12, 2023, at 4:47 PM, John Sessoms 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. > > H? 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.
Re: IR Photography
On 7/12/2023 7:59 PM, Larry Colen wrote: On Jul 12, 2023, at 4:47 PM, John Sessoms 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. H? The K20D has live view? -- 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.
Re: PESO 2023 - 234 - GDG
Yes, I do. According to my plant ID app, it’s a variety of marigold. Rick > On Jul 12, 2023, at 1:35 PM, Godfrey DiGiorgi wrote: > > Beginning to look through a bunch of photos I made earlier in the year but > hadn't done much rendering of for lack of time. Heh, everyone loves flowers... > > Yellow Flowers - Caspar, CA 2023 :: https://flic.kr/p/2oP4Qdp > Leica M10-R + Summarit-M 75mm f/2.4 > ISO 100 @ f/8 @ 1/90 > > enjoy! > > G > -- > %(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. -- %(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.
Re: IR Photography
> On Jul 12, 2023, at 4:47 PM, John Sessoms 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? > > 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. > > -- > 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.
IR Photography
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. 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. 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? -- 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.
PESO 2023 - 234 - GDG
Beginning to look through a bunch of photos I made earlier in the year but hadn't done much rendering of for lack of time. Heh, everyone loves flowers... Yellow Flowers - Caspar, CA 2023 :: https://flic.kr/p/2oP4Qdp Leica M10-R + Summarit-M 75mm f/2.4 ISO 100 @ f/8 @ 1/90 enjoy! G -- %(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.
