Lucky AeroPan 200

Lucky AeroPan 200 was never meant for you. Lucky Film Corporation in Baoding made it for the Chinese military, loaded it into reconnaissance cameras for high-altitude work, and the rolls only reached civilian hands when surplus lots leaked onto eBay and Taobao in the late 2000s. Most carry a develop-by date of 2010, which tells you exactly what you are getting into.

The base is panchromatic B&W on a thin aerial substrate, repacked by surplus sellers into recycled 35mm cassettes. No DX coding. No consistent frame count either; sellers wind about 20 exposures per cassette and you lose the last frame to tape splice. Treat box ISO 200 as optimistic. Photographers who have tested the surviving stock rate it at 100 to recover shadow detail, since two decades of room-temperature storage have eaten roughly a stop.

What you get in return is character nobody is producing fresh. The aged emulsion shows cloudy patches in the shadows that look like water spots, a green-cyan cast on the base that clears in development, and a low contrast curve that softens highlights. Compared with similarly aged Soviet Type 17 aerial stock the look is gentler, less crunchy, more like a damaged negative than a high-acutance one.

HC-110 dilution B gives the best results on the rolls people have tested. Rodinal at 1:50 works but pushes shadow noise. Caffenol holds together too. The film curls hard, so a glass carrier helps at scan time.

Not in production. Lucky's black and white restart since 2017 has focused on SHD 100 and SHD 400 rather than the aerial line. What surfaces now is freezer-stock from estate sales or the last surplus brokers.

Reciprocity exponent is 1.31. Zone Light Meter applies the correction past one second, so a metered 30-second exposure becomes about 90 seconds at the negative. With a film this old the reciprocity math is already drifting from the original spec. Bracket on anything past ten seconds and accept that some frames will be unrecoverable.