I'm looking for some diagnostic help with this- I have a strange flare in the middle of this frame. It is the only frame on the roll that has it, and the frame is from the middle of the roll, so it's not an in-camera light leak or the roll leaking.
Camera is a Rolleiflex 2.8E, with a Rolleinar 1 attached. Film is Fuji NPS160.
I did mention the film type- it's Fuji NPS 160. Rolleiflexes take 120. It's always possible it's a processing issue, but the lab that does my C41 for me runs dip-n-dunk, so it's unlikely to be a processing issue. I suppose it COULD be a problem with the film, as the film is about 11 years out of date. But that wouldn't explain why it happened to the middle of a single frame in literally the middle of the roll.
Only a guess, but I can imagine someone in the processing room (checking temps, adding replenisher) when the dip 'n dunk was up in the air between dips, and dripping something from their arm onto your film. Or as I've actually seen with my own reel/tank processing, perhaps a piece of solid matter temporarily adhered to the film, thus changing the development characteristic. Anyway, 11-year-old film is a crap-shoot.