Your are likely correct, I should said the majority of folks who have posted here seem to shoot at a lower ISO, outside of PhotoTrio most likely shoot at box speed. And again true, old TriX shot at 1600 and developed in Diafine while a little soft had very good shadow details. The newer version of TriX with a thinner emulsion cannnot absorb as part A developer as the new thicker emulsion version.
The fact that Mary Ellen Mark liked to shoot Tri-X at EI 250 does not mean that Tri-X was not an ISO 400 film. Kodak claimed it was an ISO 400 film because they tested the film according to the ISO rubric for determining film speed and determined that it was ISO 400.
CatLABS claims that its new film has an "EI ISO" film speed of 320. I do not know 1) what "EI ISO" is supposed to mean, 2) whether CatLABS determined that its new film has a film speed of 320 according to the ISO rubric, or 3) if the film does have an ISO film speed of 320, why they nevertheless recommend that it be shot at EI 200. Maybe they just think their new film looks better overexposed.
Aren't zombies at least half alive?
Kodak has been the best sales person for Harman products. Panatomic X gone, use Pan F. Plus X gone use FP-4. Improve Tri X, use HP-5. Drop Tmax 3200, use Delta 3200.
"EI ISO" probably means that their testing shows 320 in the usual ways, but lacks the full rigor required to actually call it ISO, while they recommend shooting it at 200 for best results. That does make sense - downrating film a little is really common with most black and white films benefiting from being given at least a little more exposure than the ISO index would call for. It's just not that common in marketing for the company to say so, so I found it a bit odd. No problem, just unusual.
"EI ISO" probably means that their testing shows 320 in the usual ways, but lacks the full rigor required to actually call it ISO, while they recommend shooting it at 200 for best results. That does make sense - downrating film a little is really common with most black and white films benefiting from being given at least a little more exposure than the ISO index would call for. It's just not that common in marketing for the company to say so, so I found it a bit odd. No problem, just unusual.
Paul, when you open your cassettes, assuming it is 35mm, can I ask that you tell us if they have the electrical tape like aparat reported and what the code underneath the tape says. If it's 120 roll film does it say what the speed is on the backing paper?
Thanks
pentaxuser
Probably a good choice if you don’t look at the box. Fortunately, there is no data sheet to sow confusion,i’m just gonna shoot it at 200, like their site says.
I’d say most Portra 400 is shot at box speed, except for people who hang around sites like Photrio, which may or may not include a lot of moms.Similar to Kodak Portra 400. Everyone and their mom acknowledges it is an iso 400 film, but has to shoot it at 200.
My 5 rolls have a non DX coded white label, there is bar code and the CatLabs logo, list the ISO as 320. Once I shoot the roll I will peel the label back to see what is underneath.
Can you provide a link. I didn't see this on their website, or Facebook or Instagram pages.
It's at the bottom of this page https://www.catlabs.info/about-us under 'Gender-Pay-Gap Discount:'.
Funniest post in this thread. If not of the year on PHOTRIO. Whether intentional or not.
I suppose Catlabs should be happy about the film publicity it got from this thread; I mean, it is already 12 pages!!
Thanks. Odd place to put it, but I am glad they offer women the discount.
They are not lively shadows! They are zombie shadows!
Wow. That’s pretty grumpy.I'm not.
I still am waiting for everyone’s sample images and film speed tests, so let's give it a few days.Think it's about time to mute this thread.
OK, you win. That one's funnier.
I’d say most Portra 400 is shot at box speed, except for people who hang around sites like Photrio, which may or may not include a lot of moms.
Not according to insta/youtube/tiktok/FB/myspace…
Not according to insta/youtube/tiktok/FB/myspace…
Of course they are. Who knows what evil lurks in the hearts of men ?
Wow. That’s pretty grumpy.
I still am waiting for everyone’s sample images and film speed tests, so let's give it a few days.
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