Maximum effective ISO is an estimate of the highest sensitivity at which a camera can capture excellent quality photos.
Cameras with higher effective ISO will be better choices for indoor photography, night shooting, and indoor sports photography, especially if you intend to make large prints.
You can learn more at our glossary entry.
Maximum effective ISO test data courtesy of DxO Mark.FZ200 test data on DxO Mark DMC-FZ28 test data on DxO Mark
Max aperture f/2.8 across full 24x optical zoom range of Leica DC Vario-Elmarit-branded lens; Relatively sharp and detailed images for a superzoom camera; Full-res burst shooting at 12 frames per second; Advanced photographic capabilities (manual focusing/exposure controls, RAW image capture, etc.); Full HD video recording up to 60p.
Control scheme and menu layout frustrating to use, especially the over-reliance on the rear dial; Higher ISOs produce smudged and blurred images as noise reduction efforts increase; Tendency to clip highlights; EVF doesn't switch on automatically when you look through it.