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It is my understanding that photography is prohibited at the Body Worlds exhibit (I've been there three times).
To answer another question, there are no L-type EF-S lenses. EF is the name of the mount that has been in use in older 35mm Canon film bodies.
35mm and full frame digital sensors need bigger pieces of glass to focus the image onto the film/sensor plane. the 20D/30D/40D/300D/350D/400D use APS-C sized sensors which can make do with smaller pieces of glass, making the overall size of the lens itself smaller. Therefore, EF-S lenses are smaller than their EF equivalent.
Not all Canon lenses have the USM focusing; many of the cheaper models, for instance. The Roman numeral is just the model number of the lens; for instance you will see the 50mm f/1.8 MkII (Mark 2). The MkI model had a distance scale, was, heftier and had a metal lens mount. The MkII version is cheaper and has a plastic lens mount.
Another example: the EF 70-200mm f/2.8L IS USM designates an EF-mount lens, 70-200mm focal length, f/2.8 aperture throughout the range, image stabilizer, ultrasonic motor, and L build quality. There are different generations of the USM, but I do not think these are marked on the lens itself.
For reference, Canon lenses with a gold ring around the front indicate USM inside, red ring is only for L-type lenses, green for DO (diffractive optics) lenses, and silver for budget lenses.
Another thing: it's the Tamron 17-50mm, not 17-55mm.
To answer another question, there are no L-type EF-S lenses. EF is the name of the mount that has been in use in older 35mm Canon film bodies.
35mm and full frame digital sensors need bigger pieces of glass to focus the image onto the film/sensor plane. the 20D/30D/40D/300D/350D/400D use APS-C sized sensors which can make do with smaller pieces of glass, making the overall size of the lens itself smaller. Therefore, EF-S lenses are smaller than their EF equivalent.
Not all Canon lenses have the USM focusing; many of the cheaper models, for instance. The Roman numeral is just the model number of the lens; for instance you will see the 50mm f/1.8 MkII (Mark 2). The MkI model had a distance scale, was, heftier and had a metal lens mount. The MkII version is cheaper and has a plastic lens mount.
Another example: the EF 70-200mm f/2.8L IS USM designates an EF-mount lens, 70-200mm focal length, f/2.8 aperture throughout the range, image stabilizer, ultrasonic motor, and L build quality. There are different generations of the USM, but I do not think these are marked on the lens itself.
For reference, Canon lenses with a gold ring around the front indicate USM inside, red ring is only for L-type lenses, green for DO (diffractive optics) lenses, and silver for budget lenses.
Another thing: it's the Tamron 17-50mm, not 17-55mm.