Polaroid Type 57

Type 57 was the high-speed sheet in the Polaroid 4x5 family, rated at ISO 3000. That number is not a typo. The emulsion was built for situations where Type 52 at 400 was not fast enough: forensic and scientific work, medical imaging, oscilloscope photography, available-light press shooting in genuinely terrible conditions. Police evidence labs in the 1970s and 80s used 57 routinely because they could pull a usable print from a handheld camera in a dim crime-scene interior.

The trade-off was visible. Grain was coarse by any standard, contrast ran high, and the tonal scale was compressed compared with Type 52 or 54. None of that was a flaw if you understood the purpose. Push Tri-X to 3200 in HC-110 and you got similar grain on a much longer turnaround. With Type 57 you had the print in hand in fifteen seconds.

Working photographers used Type 57 less as a proof and more as a final image when the speed was the only thing that mattered. A handheld 4x5 image in a poorly lit room was simply not possible on conventional sheet film of the same era.

Compared with pushed Kodak 2475 Recording Film in 35mm, Type 57 had less grain and more density. The 4x5 negative size carried resolution that the high speed would otherwise have given up.

Format was 4x5 single sheets in twenty-sheet boxes for the 545 holder. Discontinued in 2008 with the rest of the peel-apart line. Surviving stock is rare even among Polaroid hoarders because most of it was used up for working purposes rather than archived.

Reciprocity exponent is 1.0. Zone Light Meter treats the metered time as the shot time. For low-light proof work where the speed was the entire point, the lack of correction was itself a feature: a 1-second handheld reading was a 1-second shot, no math, no surprise.