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Thought's on IR and full spectrum? (please share if you've got some) 01/09/26(Fri)16:16:03 No.4493013
Thought's on IR and full spectrum? (please share if you've got some) 01/09/26(Fri)16:16:03 No.4493013
Thought's on IR and full spectrum? (please share if you've got some) Anonymous 01/09/26(Fri)16:16:03 No.4493013 [Reply]▶
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I like having the extra possible color spaces to work with when I want
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I really like IR, it’s a fun shooting experience made much easier now that i have a rangefinder. I’ve been shooting IR for several years now, and only now I’m I really starting to «get» it. Pyrocat has been my developer of choice for it now.
However I only like B&W IR, i think films like aerochrome and the full spectrum digital stuff is kind of silly unless you use the colors for a reason. When I say this I’m reminded of the photographer who shot child soldiers in Africa on aerochrome.
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>>4493043
Norway in winter isn’t the best time to use IR, but nevertheless I continue. This was some weird weather. Fog rolling in with intermittent sun.
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>>4493043
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>>4493043
rz67, 6 second exposure
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>>4493052
i’m a pleb so i use this
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>>4493057
Nice. 510 pyro is better for smaller negatives and a good "beginner" pyro anyways. If stained fixer bothers you pyrocat MC does not turn my TF4 fixer piss yellow.
It's quite easy to mix and super inexpensive if you ever decide to give it a shot. The only pain is getting some of the chemicals to dissolve fully in the propylene glycol if you choose to use it for shelf stability. Photographers formulary has all the raw chems for it.
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>>4493043
censor because blue board but earlier when i was using IR I found some grow bulbs that emit the frequencies of light IR is especially sensitive to. made for some of my favorite images like picrel
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>>4493033
Takes one to know one
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A DIY full spectrum conversion is a great way to get some use out of an older camera
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I bought 3 Rolls of IR sensitve BW film because just putting that in my camera is easier than converting my DSLR.
Unfortunately I fucked up when buying the filter so all of the IR shots came out blank. But I still got two rolls left and I'm waiting for trees to grow leaves again and sunny days being more common to try again
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>>4493564
Be careful my dude, a lot of automatic SLRs use a infrared light as a part of the film advance mechanisim which can fog or outright blank your IR film.
Normally I hear about fogging but it's not impossible this happened to you and it was extra bad.
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>>4493588
The camera is fully mechanical so no worries there.
The film looks like regular BW film if you use it without a filter, so luckily I took every picture twice (to compare if I got the exposure right and get a better feel for the effect mostly) and only the ones with the filter came out blank, because I got one with the wrong wavelength.
The regular photos like picrel are fine, so the the roll wasn't completely wasted.
But I do want to caution people how sensitive this film is. I got what looks like quite a bit of light leaks well into the first few frames and I suspect it's just from handling the canister outside on a sunny day.
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>>4493613
>I got what looks like quite a bit of light leaks well into the first few frames and I suspect it's just from handling the canister outside on a sunny day.
picrel
You can see there is some leakage at the beginning of the film as well as around the sprocket holes.
Next time I'll definitely make sure to load the film at home or at least find a nice shady spot
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>>4493655
>>4493655
I used some cheap noname 850nm Filter from China, but the Film (Rollei Infrared) only goes to 750nm, so no idea how I managed to mess that up.
I couldn't find any solid numbers on how much I needed to adjust the exposure for the filter so I think I went for like 5 or 6 stops of overexposure.
It's honestly just really fun to shoot to, because it's such a deliberate process, of setting up your tripod, composing the image, dialing in your setting, putting in on the filter. Really relaxing.
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i only know digital.ir at the sensor.
but i want more.
what are the limits?
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>>4494099
>what are the limits?
They don't make the "good" IR film (HIE) anymore, which could get 900nm. Digital will get you 800+nm, current production films aviphot and SFX will get you around 720nm.
Take the microbolometer pill, 7500+nm
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Direct sunlight, incandescent or xenon flash light is fine for IT but normal led or fluorescent does not have enough IR. Vintage lenses which have the IR focusing mark are designed to work with IR, but modern lenses usually have not.
For full spectrum, chromatic aberration can be a problem on any lens.
(Modded Canon A810, W12 minus blue filter, hue +120.)
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>>4494121
(Not OP)
Slap a chinkexpress IR pass (720nm or more) filter on digital camera, few seconds exposure for subjects in direct sunlight depending of the camera builtin IR cut filter. Optionally first take a photo of grass in sunlight thru IR filter and set custom white balance in camera by that.
Results will not be great but it's a start.
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>>4494243
Modded camera + W12 + RGB->BRG channel swap is digital imitation of Aerochrome false color film.
Visible light blocking IR pass + white balance on grass is almost monochrome but channel swap still improves the look.
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>>4494275
If I remember right the camera I modded and shot that with cost 40€ in local shop new. (Canon PowerShit A800.)
I replaced the IR cut filter with one cut from a polyester 780nm IR pass filter which cost around 30€ + postage.
Low end PowerShots had thin IR cut filter which could be tossed or replaced.
Cameras with a thick builtin filter (low end Nikons?) may need a clear glass replacement to focus properly.
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