Micro 4/3 vs APS-C and focal length
Hi, I am new to the forums, wouldn't say I'm a beginner but don't have a great grasp of all the technical aspects of digital cameras....I want to buy a camera with a larger sensor, and I like to take pictures of wildlife, birds, etc. so want some significant zoom. In the past I had Fuji HS-20 and before that Lumix FZ-5. I have a Sony A57 with a 55-200 zoom but I find it too bulky to carry and its only 300 mm 35 mm equivalent, I'd like lots more...which is going to weigh even more....My HS-20 had 750mm which was nice. My question has to do with comparing the APS-C vs the micro 4/3. Since the APS-C is 64% or so larger than the M4/3 does that mean that an image taken say at 200 mm (so 300mm equiv.) on a camera with the APS-C will be 64% larger than one taken at 150 (300 mm equiv.) with M4/3? Not sure if I am wording my question right, what I am getting at because the APS-C is a larger sensor, will I effectively get the same detail at a shorter focal length than I will with the M4/3? I'll stop for now and see if anyone can make sense of my question!