First, thanks to Martin for his response on lens cleaning! I recently decided to make the change on the battery in my 35GT, replacing the PX27 style battery with the new battery cap and (2) CR1/3N batteries. The original battery in the camera when I got it was an EPX27 which seemed to work ok. When I would press the battery check button, the meter needle in the viewfinder would operate properly, that is, it would drop to 1/30 and then rise to center itself on 1/125. When I made the change to the newer CR 1/3N batteries, The needle now drops to 1/30 and then rises to 1/500. Is this normal? I did shot a roll of 24 exposure 100 ISO print film, just to check the camera. The first half of the roll was shot with the EPX 27 battery installed and the second half with the CR 1/3N batteries installed. I honestly could not detect any difference between battery sources, at least in terms of film exposure. Any thoughts?