On 30-Sep-01 Michael Holley wrote: > I want to purchase a used Polaroid back for my 4 x 5 LF camera. Can anyone > recommend a specific model as there seems to be several different types (500, > 545, etc.) ? P.S. S. K. Grimes has some excellent tips on ways photographers can service their Polaroid 545 holders: http://www.skgrimes.com/545/index.htm