I just purchased an Olympus 5050 and PT-015 for my upcoming trip to Bonaire. I will be using it for macro only with the internal strobe and an L&M Mod light. I've been doing a little experimenting with it on land to get used to operating it and it seems like I'll probably use it in Apeture or Manual mode. In both of those modes the camera seems to default to ISO 64. Is there much difference in image quality ie; noise, etc. between ISO 64 and the higher ISO settings.
Larry
I've shot at 64 and 100 and not noticed any quality differences.
TedJ
If there is enough light (artificial or ambient) I leave mine on 64. The difference is not huge but the picture can get quite noisy at 100.
In both of those modes the camera seems to default to ISO 64.
You can select an ISO (64 - 400) using the menu instead of relying on Auto. Also make sure you have 'All reset' off or that will reset all your menu settings to default, on of which is 'Auto' for the ISO setting.