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Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

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Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#111

My first job over a decade ago was managing a photo lab. The x-ray machines would often damage film that people traveled with. Amateur photographers just weren't aware. The damage typically looks like white fuzzy diagonal lines across the image. It's not enough to completely destroy a picture, but it'll ruin it. The most common widespread damage we saw were people that bought like 50 disposable cameras for their Cari…

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Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#112
post #107

Earlier quoted context omitted.

There are companies like Silbersalz ( https://silbersalz35.com/ ) selling ECN-2 cinefilm stock in 35mm cartridges. You have to return the film to them for processing, rather than take it to a C-41 lab - and they warn that if you send them to a C-41 lab, you can damage the lab's equipment and ruin everyone else's photos as well as your own. I don't know how paranoid the warning is, but that seems like it could be pret…

> There are companies like Silbersalz ( https://silbersalz35.com/ ) selling ECN-2 cinefilm stock in 35mm cartridges. To be fair, anyone buying that likely knows what they're getting into. Tri-X was sold next to C-41 film in every store, so a lot of people would just grab it when they wanted B&W thinking it was the same thing to develop as color film. (Yes, there is B&W C-41 film as well)

> To be fair, anyone buying that likely knows what they're getting into.

True, I'm just dwelling on the possible consequences. I have some Silbersalz film myself that I haven't used yet, and I'm actively imagining everything that could go wrong.

> Yes, there is B&W C-41 film as well

Ilford XP2 - it looks a bit different from typical B&W film, with very flat whites.

I used to love XP1, which came out sepia when processed C-41.

Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#113

I have been traveling with a Filmguard bag. Sometimes they take it out and ask for a hand inspection, sometimes they don't they rarely insist on scanning the films themselves outside the bag. Regardless never check-in your films. Nothing can protect them from the powerful scan for check-in luggages.

Those bags do not do what you think they do.

When a TSA x-ray operator sees an opaque bag on the screen, he/she just turns up the exposure until the contents are visible. Not much help there for your film.

Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#114

What about those full body scanners? I always opt out due to health concerns. Does anyone known anything about the actual radiation levels involved in those and the safety standards the machines must live up to?

If you assume the dose is absorbed by the "whole body," then it isnt of any concern. However, in reality the energy is so low that almost all the dose is absorbed by the outer portions of skin, which could be more hazardous. Public-facing literature i've come across doesnt address this, so erring on the side of caution isnt a bad idea. More importantly it disincentivises use of these devices for security theater.

Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#115

What about those full body scanners? I always opt out due to health concerns. Does anyone known anything about the actual radiation levels involved in those and the safety standards the machines must live up to?

I know a lot about them; I researched them extensively even to the point of talking to designers.

I came to the understanding that they're quite harmless; even considering the radiation doses you get while flying after (because, radiation is additive of course)- However using them many times per day can cause damage to the skin over long periods of time.

Regardless, Opt out anyway; if people choose to opt out the economics of the devices will stop making sense and perhaps they'll be a little less invasive in future.

I will always opt-out, even when I'm being threatened or condescended to (as was the case in Gatwick airport some time ago).

Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#116
post #68

Earlier quoted context omitted.

Don't SSD have some kind of cyclic redundancy check?

I posted the same comment yesterday and for some reason got downvoted to oblivion. SSDs do not rely on bits being correct. Raw bit error rates in multi-level flash are generally over 1%. In other words if you read a 4K page you are guaranteed to get several wrong bits. The only reason a of it works at all is because of sophisticated error-correcting codes.

I posted the same comment yesterday and for some reason got downvoted to oblivion.

Probably because of the "90% bit error rate" part of the comment. Obviously SSDs can't tolerate anything close to 90% bit errors.

If that kind of error rate could be corrected in the general case, it would have profound implications for information theory in general, not just hard drive manufacturing. It would be equivalent to a data compression algorithm that could crunch anything by 90%.

Basically the only way this could work would be if the SSD's actual physical capacity were several times larger than specified, so that the vast majority of its space could be used for redundant encoding. I'm sure that's true to some extent, but I doubt a 100 GB drive is actually a 1 TB drive with 90% redundancy.

Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#117
post #71

Earlier quoted context omitted.

> Buying a 100 megapixel digital camera would cost me ten thousand dollars minimum. Hasselblad makes some nice ones. https://www.hasselblad.com/h-system/

Yeah, they're marvelous. But the digital back by itself is $26,000. A full camera is around $35k.

There are some options in the $3-5k range. $3k gets you a used Pentax 645Z which is pretty nice.

(I know, I know, only $3-5k, what a deal. Better than the "cash payment for a pretty nice car" range though.)

Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#118
post #57
post #30

Earlier quoted context omitted.

You’re getting all kinds of answers but a key one, for me, is that film is unavoidably slow and expensive. Digital cameras teach you that each frame is cheap and throwaway. That encourages some kinds of photographic/artful thinking while obscuring others. Old masters of large format film photography have a workflow and thought process that’s vastly different from modern digicam shooting. When you have just one or two…

This, this and this. I've consistently found my keeper ratio to be much higher when shooting film, as the memory cards are small and single-use only. That forces you to think your composition through, take an extra second or two to ensure the exposure is good - it basically enforces self discipline. (Which reminds me I've got a few rolls to develop after my latest outing with the Texas Leica - a Fuji G690BL; the 6*9…

I personally find the act of throwing away the garbage shots to be paralyzing with digital. If you have 8 nearly identical shots, which do you keep? And the act of examining and comparing to make a choice based on some minute detail drastically slows down the whole cataloging and editing process.

It's the paralysis of choice. Less is literally more, and I personally don't find an evening of spending a couple hours paralyzed by choice and analyzing minute details to be enjoyable. At all.

And yes, film makes you think a concept through fully and optimize everything before you press the shutter. My 'hit' rate is much higher with film than digital.

I have so many cameras I don't have time to use them all, but my Fuji cameras and LF lenses are definitely among my favorites as well. Very underrated, Fuji didn't do a good job of advertising in the west at all. My general purpose camera is a Pentax 67 though. Looking forward to trying a new Polaroid rangefinder that was converted to 4x5 as well. Just bought some Velvia for a cool $2 per frame.

Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#119

Genuine question: Why do people still use film anymore? I know some big movie studios do sometimes use it (The Hobbit comes to mind), but I don’t understand why anyone would use film when we have DSLRs that can have resolutions over 30 megapixels. EDIT: added “why” at beginning

The reason why people still shoot on film (or record vinyl records) is the same reason why people still make ukiyo-e woodblock prints: it's an art form, and both the process and the results are interesting.

Re: Kodak Alaris warns the TSA's new airport CT scanners can damage undeveloped film

#120

Genuine question: Why do people still use film anymore? I know some big movie studios do sometimes use it (The Hobbit comes to mind), but I don’t understand why anyone would use film when we have DSLRs that can have resolutions over 30 megapixels. EDIT: added “why” at beginning

I still use and travel a lot with film, including ISO800 and ISO3200 film the latter of which is totally destroyed if it goes through the scanner, even in an film protection bag. Megapixels are unimportant, there is a look to film you can’t reproduce no matter how many VSCO plugins you use :)

To be clear, film protection bags don't work for scanners at all. And if the operator sees a blob he can't image, he is likely to back up the belt and increase the power until he can.

Film protection bags are to protect against fogging from radiation at higher altitudes, not the scanners.

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