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.
