SaveKodak
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Pick a film that is likely to stick around. To replace a modern film like Acros I'd reach for an equally modern film like Delta 100 or TMAX 100. They won't have Acros's unique tonal rendering, but they also won't hold you back in any way. Top notch films each. I choose to shoot Ilford for B&W to support them, and color for Kodak to support them. Best of both words!