Forum Moderators: wheatpenny Forum Coordinators: Anim8dtoon
Photography F.A.Q (Last Updated: 2025 Feb 03 6:38 am)
That's 'how nice' and 'stark' B/W--its way too late LOL. Just outside photographing an Imperial moth--what a beauty--bigger than many birds. Now it is--for sure--bedtime. A quick question too--notice how much 'noise' there is in the sky in the IR??--and not in the color converted to b/w. I'm wondering if that's due to the haze--that the filter picked up. Anyone know?? Diane
The first one is way cool Diane... Thumbs Up Not sure about the IR and why it is noisy... My guess is that it is reading the moisture in the air at diferent levels of intensity, or that it has something to do with reciricol failure, but I do not understand this enough yet to be sure. BTW... I do not know if it is possible, but that old shed might make some really cool shots if done from the inside out. I bet at the right time of day the lighting coming through those open slats would be spectacular. Now I am off to shoot something... I do not know what, but it is 6:35 AM in my time zone and I am going to find something to photograph.
OK. Let's get technical! IR basically involves it self as the absorbance and therefore re-emittance of IR energy. So YES you will see an effect of water since it sbsorbs IR! Haze is probably NOT IR active in the wavelength range of what your filter is operating at. Gases such at turpentine should be, grass powder ( since grass is IR active ) will be, ect. Which is why I suggested the different material experiment. At least you will get a feel for how different substances interact witht he IR. Don't forget then that, even if there is a dusty haze before a subject you can still photograph it pretty clearly. Because the haze WON"T absorb IR. Does this make sense? Bsteph
Yes, I do like it a lot. I made the mistake of selecting only the foreground grass instead of the whole grass area--I'm trying to see in my mind what you did with the mask/fill. I'll have to try it and then I'll get it. The sky is easy--totally understand what you did and why. I knew the shed was off on its levels but wasn't quite sure how to handle it. I guess you mean that you used the same mask on the top level??? Thanks so much--I didn't really expect you to 'do it' S, but that's a big help. Bsteph, I do understand-thanks. This haze (I should have called it fog, which is what it really is) was definitely not dust haze--it was wet haze--basically a cloud sitting on top of us more or less--which happens fairly often. I have ordered a book called 'Art of Infrared Photography' by John Paduano--I know from reading some reviews and synposes that he discusses materials and how they act and react to IR--for instance, I gathered that spruce and pine do not emit much IR. That means that large areas of our mountains down here may not show a lot of IR activity except in areas where deciduous and evergreens are mixed. At our high altitudes, spruce (which are also highly endangered by pollution and acid rain from the west) are the trees you see the most. Anxious to get up to the higher altitudes and get some pics and see for myself. Diane
No but it can show you fancy graphs! Remember your earlier statememnts about the differences of various plant leaves. How about the differences of various chemical groups. In school on IR, one Mass Spectrum, and a Magnegtic Resonance Spectrum was all it took to tell exactly which of 5 or so chemical species were present. Bsteph
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What are you all doing out there--not a lot of photography or at least not posting. Can't keep a forum going without posts. So here's the rest of my photography day. Well, thick as soup haze and then torrential rain, more tomorrow. Luck of the draw, I guess. This was the rest of my afternoon--as I said, 'thick as soup' haze--what I love is how the IR filter is able to gather details in spite of the haze. Here is the color converted to duotone gray first. Notice Bakers Mt in the rear--indistinguishable. However, you do get pretty good detail on the foreground grass.