In my "film" shoulder bag currently sits :
- Unloaded Canon 7 (working selenium meter that seems to match my incident meter most the time)
- Canon 50mm f/1.8 attached (type 6, Serenar optics, but newer alloy casing/body, 8 blade aperture, curved inward)
- Metal body and rear LTM lens cap from the original canon lens/body.
- Plastic FSU rear LTM cap
- Spare 312 batteries (for my hearing aids, I do the same in my digital bag)
- Pilot G2 gel pen
- Pad (either ancient officemax memo pad, or Rhodia pad, habit since they're both fountain pen friendly)
- Couple Lens pens
- White wash cloth (either as a lens, or camera wrap when stacking inside the bag, or to help with the cold)
- Minolta Auto Meter IVf (incident meter for ambient, and corded/non-corded flash/strobe)
- 20 Inch shutter release cable
- 135-36 Ilford HP5+ 400
- 135-36 Kodak Tri-X 400
- 2x 135-36 Foma Retropan 320
- 135-36 Ilford FP4+ 125
- 135-36 Kodak TMax P3200 (exp 2004, expose at 400 or 800)
- 135-24 Kodak Ultratec (ISO 3 Orthochromatic, rolled from bulk)
- Canon Serenar (1951) 35mm f/2.8 (this lens tends to go back and forth from my Canon 7, to being adapted onto my Olympus E-M5 mirrorless)
My 'digital' backpack tends to gets quite a bit more loaded.
But film wise it might hold the overflow such as my Univex Mercury II half frame camera in conjunction with the other stuff.