X-ray line scan cameras produce high-sensitivity, high-resolution, X-ray transmission images of moving objects transported on a conveyor belt or similar apparatus. These cameras are suitable for inspecting the inside of an object without causing damage, for example, detecting foreign bodies mixed in food, quality of electronic components, and completeness of assemblies and packaging.
But metal detectors 'could' cause lost data on CF cards. I've never heard of this happening, but they are more likely to corrupt data than X-ray machines. I've run digital cameras through airport security X-rays many times - never lost a picture or caused damage,
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But metal detectors 'could' cause lost data on CF cards. I've
never heard of this happening, but they are more likely to corrupt
data than X-ray machines. I've run digital cameras through airport
security X-rays many times - never lost a picture or caused damage,
You never heard of it happening yet you assert that metal detectors can cause lot data. No they won't. People want so much for something to worry about, flash cards or digital cameras being affected by metal detectors or x-rays. Oh, how people want to create new urban legends.........
Thanks for your opinion, but what are you complaining about. I never asserted that metal detectors WOULD cause data loss - I put emphasis around 'could' for a reason. I also stated clearly that I had never heard of a case of that happening. The physics involved are there - metal detectors use magnetic fields, moving conductors through magnetic fields will induce a current. That induced current is probably way, way below the threshold needed to cause data loss, but the fact remains, it is not impossible. Thus the word 'could' (emphasis still there). Also, that explains why I stated I'd never heard of it actually happening (I know I'm repeating myself to be clear). I also reassured the OP that I had travelled many times with my digital cameras without any loss.
You never heard of it happening yet you assert that metal detectors
can cause lot data. No they won't. People want so much for
something to worry about, flash cards or digital cameras being
affected by metal detectors or x-rays. Oh, how people want to
create new urban legends.........
Do watch your equipment at airport security. Last trip I had a camera bag and carry on. In additon they had me put my coat and shoes in a seperate tray plus my laptop in a seperate tray. With four items going through in seperate trays that was a lot to keep track of. Stuff has been known to "get lost" at the security checkpoints.
Sorry, I did not mean to make it sound like it was directed to you losing brain cells. It was a generalization as I have seen people bring up concerns about the airport machines on many disscussion boards---- probably because they associate the cards with film and don't understand why the x-rays from the x-ray scanners could affect film .
Sorry, I did not mean to make it sound like it was directed to you
losing brain cells. It was a generalization as I have seen people
bring up concerns about the airport machines on many disscussion
boards---- probably because they associate the cards with film and
don't understand why the x-rays from the x-ray scanners could
affect film .
No. I looked into this very seriously when the first cameras came out. Researched it throughly. The issue can come up with the CF cards, should the X-Ray system be out of spec.... or tuned up really high in high threat conditions. It's not permenant, but can cause (low probabiliy) loss of data on the card.
This was seen much more in sensitive film cameras (ISO>400 ASA) where the film got "fogged" due to foriegn country poor controls on XRay equipment. So far, no failure of a sensor has been attributed to a properly functioning Xray machine in any airport.
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Because your pictures are important to you, this information is presented as an alert to travelers carrying unprocessed film. New FAA-certified (Federal Aviation Administration) explosive detection systems are being used in U.S. airports to scan (x-ray) checked baggage. This stronger scanning equipment is also being used in many non-US airports. The new equipment will fog any unprocessed film that passes through the scanner.
Note: X rays from airport scanners don't affect digital camera images or film that has already been processed, i.e. film from which you have received prints, slides, KODAK PHOTO CD Discs, or KODAK Picture CDs.
X-ray equipment used to inspect carry-on baggage uses a very low level of x-radiation that will not cause noticeable damage to most films. However, baggage that is checked (loaded on the planes as cargo) often goes through equipment with higher energy X rays. Therefore, take these precautions when traveling with unprocessed film:
The FAA provides air travelers in the United States the right to request a non-X-ray inspection of photosensitive products (FAA Reg. 108.17-AIRPLANE OPERATOR SECURITY). The complete regulation is very informative, but section Part 108.17e is most important to travelers carrying film. Click here to go to the FAA Web site: FAA, or view section 17e of FAA Reg. 108: FAA 108. Remember that this only applies to air travelers in the United States.
The processing lab cannot separate X-ray fog from camera exposure, and because this type of X-ray fog often appears in patterns, it is impossible to correct this damage in the duplicating or printing process. Therefore, make every effort to keep your film away from baggage scanning devices.
There are two types of higher-dose scanners. The first type is similar to a hospital CAT scan and uses a low-dose scan followed by a higher-dose scan on specific areas of the baggage. The second type gives a high-dose, full bag scan on the first pass, damaging the film immediately.
Tests indicate that there is significant fogging of unprocessed film when the film sustains a direct hit by either of the different scanner's high-intensity X-ray beam. Faster films show a more dense fog.
Fog caused by the new baggage scanners is usually more pronounced than fog caused by other means. Fog from the CAT scan type of scanner typically appears as soft-edged bands 1/4 to 3/8 inch (1 to 1.5 cm) wide. The orientation of the fog stripe depends on the orientation of the film relative to the X-ray beam. The banding may be linear or wavy and can run lengthwise or horizontally on the film. It can also undulate, depending on the combination of the angle of exposure and the multiple laps of film on the roll. (See images below.) However, the fog will usually lack the more subtle patterns produced by traditional types of X-ray equipment. Additionally, whether or not this stripe is seen in the photographic print may depend on scene content. Busy scenes with flowers, foliage, etc. may obscure or lessen the perception of X-ray effects.
Certain film keeping conditions can produce effects that are confused with X-ray fog. The older the film, the greater accumulation of actinic radiation. With time, ambient radiation slowly fogs the faster silver halide grains so that the film appears grainier. This is especially noticeable on 800 speed or faster film. Keeping the film cool or frozen does NOT change this effect. Over time, radiation can penetrate or occur naturally in nearly all materials.
You can usually distinguish the more common types of X-ray fog by the distinct patterns and increased granularity. On 35 mm film, reverse-wind streaks are often mistaken for X-ray fog. However, these streaks are more evenly spaced and prominent, and tend to bow outward from the film perforations.
As noted earlier, exposure to some types of airport security equipment produces pronounced bands of plus density (dark patches) or minus density (light patches). The fog pattern can resemble typical white-light fogging that occurs in a defined path, i.e. from pinhole light leaks in equipment. The most defining characteristics of fog caused by the CAT scan type of equipment are the well defined width of the bands and a uniform density, with an increase in granularity within the band. The banding typically runs continuously through the whole roll or is broken by patterns from the laps of film in the roll.
In any of these cases, you should request visual inspection of your film and of any cameras containing film. Depending on the format(s) of film you have, carrying a light-tight changing bag may be advisable to help the inspection process. Remember that this is only a guaranteed option in U.S. air travel. Outside of the U.S. you are required to comply with the local standards and regulations. 658cc48d5c
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