Infrared photography
Feb 17, 2021 03:52:32 #
Pablo8
Loc: Nottingham UK.
Glad that I had my 1st DSLR (D70) converted with 720nm filter installed. Hand-held shots are easy, no more 10 to 20 second exposures, tripod, focus set up, screw in the filter, etc. etc . Of course, one really needs sunshine, and suitable subject matter. Have fun!!
Feb 17, 2021 08:09:50 #
petrochemist
Loc: UK
dsmeltz wrote:
Just do not confuse simulation for real IR. For instance, do not use a simulation to determine if you have air leaks around your windows.
When talking of IR photography people usually mean near Infra red covering 700 to 1100nm. Air leaks won't show using NIR, which needs temperatures in the hundreds of degrees for emissions to be visible.
You seem to be thinking of Thermal Imaging which is very different, needing a specially made sensor (ordinary silicon is transparent above 1150nm). Thermal imaging systems are much lower resolution - I don't think any are made that match 10 year old cameras for resolution.
Aug 6, 2021 07:31:55 #
julian.gang wrote:
Part 1. Is there a photography program that simulates a infrared filter on the front of the camera?...Julian
Honestly, julian, who cares?
Take whatever near-Infrared simulation program you can find, twiddle all the knobs & switches you desire, and apply it to this visible light-only photo. Now MAKE SURE it's going to match how it really appears in "pure" IR, such as a photo taken with a long-pass IR filter that has its "cut off" (actually, 50% transmission point) @ 780 nm. Then go to part 2 to see what it should resemble.
Aug 6, 2021 07:43:28 #
lev29 wrote:
While "your simulation program" may have rendered the vegetation appropriately, how did it do in predicting that the stripes but not the stars would "vanish"? Part 2.
Honestly, julian, who cares? (continued)
This is what it should resemble:
Honestly, julian, who cares? (continued)
This is what it should resemble:
Spectral simulation isn't, by and large, too reliable. Your question (with the poorly-worded subject title,) reminded me of those colored gels marketed in the 1950s, the ones that people ostensibly were to apply to the front of their black & white TV screens to get "color TV".
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