[QUOTE=Boomsnapp;9882372]I know the title of this topic is somewhat misleading. I know what macro photography is, what I mean is what does my camera do when I put it in Macro mode?
I know that on point and shoots, when you put them in Macro mode it actually shifts the AF unit so that it can focus on close up subjects. However, I was always under the impression that on DSLRs your macro ability was completely dependent on what lens you are using. So for example, the 18-55mm kit lens that came with the 30D only has a set focusing range, however it cant focus as close as a dedicated Macro lens. So what happens when you put the camera in Macro mode? Does it change anything in the lens? Or the autofocus? I havent noticed my lenses being able to focus any closer when I put the camera in Macro mode. Or does Macro mode act like Portrait or Nighttime modes and simply sets the settings in the camera to what would be best for Macro photography, but doesnt actually change anything optically?
I dont know if I worded this in a way that makes sense. [/quote
Actually it's quite a good question. I had a 30D but since I always shot in RAW / manual mode, I never noticed the Macro mode. Apparently (after doing some research), I have found that one thing that it does is apply a "scene" setting (in-camera processing parameters for JPEG), that might be appropriate for close ups. What that means is that the processor adjusts the curve of the image to (perhaps) increase brightness, or sharpening. I don't think it applies to any RAW shooting. JPEG only. The same principle applies to "Sports", "Landscape", "Portrait" and "Night". It makes no mechanical adjustment to your lens. As has been mentioned, you would still need to be using a lens that is suitable for macro photography, but that is a moot point now, because many of us use anything up to 400mm to capture insects etc.
EDIT: The post above mine adds more to this.
The main point would be that by choosing this mode, you would be handing most control to the camera and you would lose the ability to make your own judgement and to get the results you are looking for by applying experience.