Larry, have you thought about UV? It should be sensitive to that as well now. I kind of like UV photography. Thanks for sharing these. I look forward to more of your adventures with IR. I think that my older k-7 is going to be "fixed" that way eventually.
On Sat, Aug 10, 2013 at 9:11 PM, Larry Colen <l...@red4est.com> wrote: > On Sat, Aug 10, 2013 at 09:08:31PM -0400, Zos Xavius wrote: >> so the ultra pink IR shots are taken with the hot filter still in >> place? I know this is possible, but that exposures are greatly > > The ultra pink shots are taken with an IR only filter in front of the > sensor or the light source. I suspect that the green elements in a > bayerfilter are a notch filter, and don't let the IR through, > while the red and blue are band block filters and let IR through. > > > >> lengthened to the order of minutes sometimes as the cut filter only >> lets small amounts of IR wavelengths pass. I was under the assumption >> that shooting with a naked sensor and an IR only filter would have the >> same results, but with normal exposure times. That's actually why I >> asked if the filter was in place in all of these pictures. Clearly >> more spectrum is coming through if you ask me. I never thought that >> mixing the two would look so drastic and almost flat. Interesting. > > >> >> On Sat, Aug 10, 2013 at 8:46 PM, David Parsons <parsons.da...@gmail.com> >> wrote: >> > With an IR filter in front of the lens, and a normal IR cut filter on >> > the sensor, yes foliage turns pink (some reds get through 720nm >> > filters). Everything has a red and pink color to it. >> > >> > When you remove the IR cut filter from the sensor, it is seeing IR and >> > visible at the same time, so colors are all kinds of shifted. >> > >> > It all depends on how much IR reflectivity different materials have. >> > >> > On Sat, Aug 10, 2013 at 8:41 PM, Zos Xavius <zosxav...@gmail.com> wrote: >> >> are these all with a filter? I thought greens went pink in IR yet the >> >> lettuce is clearly still green. very odd. Its not what I would expect >> >> at all. I'm so used to seeing extremely processed IR pictures. >> >> >> >> On Sat, Aug 10, 2013 at 7:21 PM, Larry Colen <l...@red4est.com> wrote: >> >>> Excellent! Thanks! >> >>> >> >>> On Sat, Aug 10, 2013 at 06:32:01PM -0400, Matthew Hunt wrote: >> >>>> On Sat, Aug 10, 2013 at 6:22 PM, Larry Colen <l...@red4est.com> wrote: >> >>>> >> >>>> > 4) The color adjustment in LR doesn't go far enough, in either >> >>>> > temperature >> >>>> > or tint. I will eventually experiment with two pass color >> >>>> > correction, exporting >> >>>> > the file to DNG or TIFF, then running it through again. >> >>>> >> >>>> I have no personal experience, but I have read of people creating >> >>>> custom camera profiles to deal with the inadequate color temperature >> >>>> range. See, for example: >> >>>> >> >>>> http://www.luminescentphoto.com/blog/2013/07/15/setting-white-balance-on-infrared-images-with-lightroom-with-video/ >> >>>> >> >>>> -- >> >>>> PDML Pentax-Discuss Mail List >> >>>> PDML@pdml.net >> >>>> http://pdml.net/mailman/listinfo/pdml_pdml.net >> >>>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> >>>> follow the directions. >> >>> >> >>> -- >> >>> Larry Colen l...@red4est.com >> >>> http://red4est.com/lrc >> >>> >> >>> >> >>> -- >> >>> PDML Pentax-Discuss Mail List >> >>> PDML@pdml.net >> >>> http://pdml.net/mailman/listinfo/pdml_pdml.net >> >>> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> >>> follow the directions. >> >> >> >> -- >> >> PDML Pentax-Discuss Mail List >> >> PDML@pdml.net >> >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> >> follow the directions. >> > >> > >> > >> > -- >> > David Parsons Photography >> > http://www.davidparsonsphoto.com >> > >> > Aloha Photographer Photoblog >> > http://alohaphotog.blogspot.com/ >> > >> > -- >> > PDML Pentax-Discuss Mail List >> > PDML@pdml.net >> > http://pdml.net/mailman/listinfo/pdml_pdml.net >> > to UNSUBSCRIBE from the PDML, please visit the link directly above and >> > follow the directions. >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > Larry Colen l...@red4est.com http://red4est.com/lrc > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
