Yes, it may look that way. However, to get a better assessment of spectral sensitivity, a color chart from a reputable manufacturer provides a much better reference. Still, in the flag image, looking at adjacent blue and red color/greyscale areas, my measurements show the red having about twice as much density as the blue. I would not put too much stock in these measurements, though. Again, an evenly illuminated color chart is a better target for comparison.Aparat, based on the flag pic both its red and in particular its blue sensitivity seems much lower than most pancro films
pentaxuser
I posted a question a while back to ask if anyone had jimmied around with their CatLABS photos in post processing software before posting them, but no one responded.
@faberryman Me, neither. Straight from default Vuescan settings for generic black and white negative.Hadn't seen that. No post processing in mine. Straight scan from Epson V600, all indicators neutral.
It would seem that lack of curl is one of the advantages/plus points that this film has
I have no idea if grain comes from the negative or the scanner but some of Huss' examples seem particularly grainy while others much less so
pentaxuser
Here are two samples with the R72 filter. The infrared images have the signature dramatic skies. Both at around ISO 3.2.
This is really cool! Thank you so much for posting this comparison. I am still waiting for my Superpan 200 to arrive. I will try to run a test once it does. By the way, how did you find the physical characteristics of the two films, esp. in terms of the PET base, how thin it is, how little it curls, the color of the emulsion side, etc.?I did a test, shooting Superpan 200 and the Catlabs film, both at iso160, same lighting, same camera, same aperture and shutter speed, developed at the same time, in the same tank, in d761:1 for 10mins, 45 secs. Here's what they look like:
View attachment 321606
At the very least, the Superpan 200 I have is a bit slower than the Catlabs.
Superpan (the black line is from tape residue)
and Catlabs:
They look very similar but the Catlabs film is noticeably faster. But, to be fair, my Superpan is now a couple of years old.
By the way, how did you find the physical characteristics of the two films, esp. in terms of the PET base, how thin it is, how little it curls, the color of the emulsion side, etc.?
Donald what do you shoot your Rollei IR400 at with a R72? Most seem to use between 3 and 6
Thanks
pentaxuser
Yeah, that sounds about right in my experience. I used EI 3.2 for the CatLABS film with a Hoya R72 filter, and I thought those frames needed an extra stop of exposure.I haven't, yet. I got several rolls of the film, and the filter, but haven't had a chance to shoot it (never mind process) yet. Now I think of it, though, filter factor for Rollei with R72 is around 7-8 stops, isn't it? Seven would put it at EI 4.
They're not. I agree, but one can get an interesting infrared effect with those films, particularly if one is after a dramatic, near-black sky.Yep, these aren't "real" infrared films, they just have enough extended red to have some sensitivity beyond 720 nm. HIE was only about 5 stops correction with that filter, as I recall (from reading, never had a chance to shoot that, either).
By the way, your choice of soup cans for the test is very clever, as a lot of people (at least in the US) are familiar with them. They are great for assessing color and sharpness/resolution, while the white/grey background makes for a very effective test of tonality.
I did a test, shooting Superpan 200 and the Catlabs film, both at iso160, same lighting, same camera, same aperture and shutter speed, developed at the same time, in the same tank, in d761:1 for 10mins, 45 secs. Here's what they look like:
View attachment 321606
At the very least, the Superpan 200 I have is a bit slower than the Catlabs.
Superpan (the black line is from tape residue)
View attachment 321608
and Catlabs:
View attachment 321607
They look very similar but the Catlabs film is noticeably faster. But, to be fair, my Superpan is now a couple of years old.
Excellent stuff!
I don't think a couple of years will slow your film down. It seems the Catlabs is different at least in speed.
I'll process it in Rodinal some time in the next couple of days.
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