yesterday I shot 6 rolls, 3 RR80 and 3 RR400. I find a lot of the speed depends on HOW you meter. if you use an in camera meter, you will get different speeds than using a hand held meter. I use an Incident meter. I use ISO 4 for RR80 and 8 for RR200, using a 720 filter, so 5 stops, then develop for my normal speed for the emulsion. when I took the rolls out to hang to dry, I always forget, for a second, and think how under exposed they images are. then remember that the negs will look thin because of the IR effect. just scanned yesterday, but I love this time of year. the oak trees look great with IR shots
john
There’s a simple and valuable piece of advice I wish someone would have told me before. X-)It is very important NOT TO meter the sky, especially when using IR films.
yeh, its funny how the in camera meter really tries hard to bring a black sky back to middle grey. i got an ISO of .5 when I metered with an in camera meter just using the standard "meter by what you want in the picture" approach.It is very important NOT TO meter the sky, especially when using IR films.
Or a TLRanother thing that really helps, A rangefinder!
Beautiful!here is a simple small resize. hand held, shot at ISO 4, so F4.5 1/60 as metered with incident meter. Stanford Dish trail. this time of year the oaks just look great with IR. always hoping I get a secret IR something when I shoot the radio telescope. alas, another year, another no message
another thing that really helps, A rangefinder! shot with a contax G1. side sun and still get that great glow!
john
View attachment 271116
You first have to define speed.What is actually the fastest IR film available?
Well, that would be 700 to 750nm as that is what IR film covers today.You first have to define speed.
For instance sensitivy at longest wavelenght or at a certain wavelength.
here is a simple small resize. hand held, shot at ISO 4, so F4.5 1/60 as metered with incident meter. Stanford Dish trail. this time of year the oaks just look great with IR. always hoping I get a secret IR something when I shoot the radio telescope. alas, another year, another no message
another thing that really helps, A rangefinder! shot with a contax G1. side sun and still get that great glow!
john
View attachment 271116
Interesting shot of oaks. I shot Rollei IR 400 w/720nm filter, and the oaks respond much less strongly than grasses and other types of trees (typically lighter green leaves). Here is one. See the oaks on the left side of the distant hill, and the gorge below. There is a little response, but not compared to the [green] grasses, and for instance the tree on the right. Sun was pretty high in the sky. Were the grasses green or dry in your shot? TLR helps for sure!
I externally metered at ISO 6 w/720nm filter on. Looked at incident and reflective (avoiding sky).
Little Tree by Mark Wyatt, on Flickr
all the white leaves in my pict are from new growth leaves. old leaves on other types of oaks will not give me white leaves either. only new growth leaves give off strong wood effect.
The light green (new growth) seems to be key. Was the grass dry or green?
Ilford's SFX is a good film, but the Rollei IR product is a bit better. Both are at their best if exposed through a Hoya R72 filter rather than a standard dark red. Here is an example of the Rollei Infrared film in 4x5 format:
View attachment 244608
Here is the Rollei IR film in 35mm format:
View attachment 244609
What a GREAT picture.
Color infrared was used to research crop health and water stress wasn’t it? Plants with healthy amounts of chlorophyll and which are not water stressed will reflect the most amount of Near IR light (due to active photosynthesis and inner leaf anatomy).
I almost want to say it would work better on C3 plants like potato, so one could use EIR to detect wilts. Interestingly thermal IR coupled with near-IR has been investigated for sensing when to irrigate crops (here). Interesting though, the dowel may well be very reflective as pine is a pretty light colored wood. It wouldn't be surprising if the stem of that succulent is photosynthesizing as well, they've got some pretty crafty mechanisms to survive in dry conditions. Anyway, I digress! That's a neat picture with some real fantastic wood effect Mark, it really makes me want to try doing some IR imaging of my garden this year. What film did you use for those?What about this? Look at this succulent. But note that it's trunk is also reflecting a lot of near IR. Even more interesting, there are two wood dowels holding the plant up (the plant is wrapped around one, and there is another right next to it leaning to the right). They may be pine dowels. They also seem to be reflecting a lot of near IR! Maybe they are just re-reflecting light from the succulent? In infrared imaging, you have to watch out for emission sources that can misinform you about a nearby object's temperature. To the right, in the distance you will see other trunks, and other pieces of wood holding a pant up, but they do not reflect near IR to any excessive degree.
Potted Plant by Mark Wyatt, on Flickr
You can see one of teh dowels in an earlier standard B&W image. It is pretty light in color with a MedY filter.
Plant by Mark Wyatt, on Flickr
I almost want to say it would work better on C3 plants like potato, so one could use EIR to detect wilts. Interestingly thermal IR coupled with near-IR has been investigated for sensing when to irrigate crops (here). Interesting though, the dowel may well be very reflective as pine is a pretty light colored wood. It wouldn't be surprising if the stem of that succulent is photosynthesizing as well, they've got some pretty crafty mechanisms to survive in dry conditions. Anyway, I digress! That's a neat picture with some real fantastic wood effect Mark, it really makes me want to try doing some IR imaging of my garden this year. What film did you use for those?
What about this? Look at this succulent. But note that it's trunk is also reflecting a lot of near IR. Even more interesting, there are two wood dowels holding the plant up (the plant is wrapped around one, and there is another right next to it leaning to the right). They may be pine dowels. They also seem to be reflecting a lot of near IR! Maybe they are just re-reflecting light from the succulent? In infrared imaging, you have to watch out for emission sources that can misinform you about a nearby object's temperature. To the right, in the distance you will see other trunks, and other pieces of wood holding a pant up, but they do not reflect near IR to any excessive degree.
Potted Plant by Mark Wyatt, on Flickr
You can see one of teh dowels in an earlier standard B&W image. It is pretty light in color with a MedY filter.
Plant by Mark Wyatt, on Flickr
Wow that’s very interesting. Foma is cheap as chips where I am. Will definitely try it.Reading through the thread I have not seen Fomapan 400 mentioned - not a dedicated IR film but obviously capable of some 'wood-effect': https://emulsive.org/reviews/film-r...ews/fomapan-400-arista-edu-ultra-400-infrared
Reading through the thread I have not seen Fomapan 400 mentioned - not a dedicated IR film but obviously capable of some 'wood-effect': https://emulsive.org/reviews/film-r...ews/fomapan-400-arista-edu-ultra-400-infrared
I'd seen that as well, but the data sheet clearly shows the sensitivity taking a nosedive around 675nm, and bottoming out at just under 700nm. They even say it can be processed in infrared-- leaving me very confused.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?