This is the POLAROID ProPack. It is the top model of the new style folding pack film cameras. It has manual focussing and it is povided with contacts
for a dedicated electronic flash. The 3000ER setting lets you use 3000
ISO film at F11 instead of F58. As the name suggests, it was meant for
professional use. Automatic exposure system similar to the "original
style" pack cameras. It can use either standard rectangular format OR
square format pack films, the viewfinder has masks for both film
formats, but does not indicate which format is in use.
Lens: F9.2/114mm (3-element plastic) "Everset" electronic shutter, speed ~10 seconds - 1/500 sec. Size: approx. 17x14x8cm, Weight: 710gr. Built-in timer. Tripod Socket. 75/3000/3000ER ISO switch. Tripod Socket. Can use 100 or 80 film packs. Flashcube socket. Contacts for dedicated electronic flash.
Camera with flash attached.
Back view. Non-coupled timer.The timer was necessary for the original Polaroid
film, which had to be developped exactly in time according to the
temperature, whereas the Fuji FP film is self-terminating.