Kodak Plus-X Pan 125

Plus-X existed in the gap between two extremes. Pan-X 32 was too slow for available light. Tri-X 400 was too grainy for anything that needed clean shadow detail. Plus-X at ISO 125 threaded that needle for thirty-odd years, and a substantial portion of the photojournalism archive from the 1960s and 70s ran through it before T-MAX changed the conversation entirely.

The grain is fine without being antiseptic. Shot at box speed in D-76 or HC-110, Plus-X produces negatives with a slightly silver, sparkly texture that prints well on graded paper. The tonal range is gentle: highlights compress before they clip, and shadow detail opens up with even modest overexposure. For studio portraiture, contact sheets from the mid-1970s often have a quality that is genuinely hard to match on modern stock. The latitude was real and shooters trusted it.

By the 1980s the stock was feeling the pressure. T-MAX 100 arrived in 1986 and delivered finer grain at a similar speed, with better zone IX detail. Photographers who needed a clean 125-speed stock started migrating. Plus-X carried on for two more decades, particularly among darkroom workers who found T-grain stocks harder to read on the enlarger easel. Kodak discontinued it in 2011 alongside several other traditional-grain emulsions when it was consolidating the film line.

Reciprocity is mild. The exponent is 1.26, which means a two-minute meter reading becomes about three and a half minutes in real exposure. Zone Light Meter runs that correction automatically the moment you pass one second. Worth knowing if you are shooting architecture interiors or still-life work on old stock you found in a refrigerator somewhere. Plus-X expired slowly and gracefully; rolls from 2008 still produce usable negatives if they were stored cold.