Bit of an odd one.
I was was developing some Kodak Tri-x 400 and in a row in the middle of the film there are 4 frames which are half exposed half black, from side to side, not top to bottom. Then another two frames nearer the end then another couple at the end.
the only correlation between the shots is that they are all outdoors, possibly at the top end shutter speed and f-16.
Though the shots either side of the dodgy ones are also on the same days and roughly at the same times.
I've just had the camera cla'd so assume it can't be that?
the only other possibility I thought of and don't know was that I have a digital circular polariser. Though again the other frames are ok with the same filter on.
I developed with Kodak HC110 Dilution H for 14 minutes with new chemicals.
for the next batch of films I'll be taking them to a chap who offered to develop them and give me tuition.
but I am curious to know if this has happened to anyone else?