So a few years ago my father passed and I recently stumbled across his Cannon FTb. I took some photography courses in school and really enjoyed it so I figured I'd give it a shot - I never had used film just digital. I know some what about iso and over/under exposure but it's been a few years so I have a specific situation I want to inquire about. I bought/used 400 color film - but dumb me wasn't paying attention to the camera settings and I shot a roll on 250. It was an overcast day and was still relatively bright. What will this likely do to the shots? I was planning on taking these to a film lab - should I mention that I shot them the way I did? Are they worth taking? What should I expect?