Although it doesn't add any reach, I thought since it cropped the image in camera and made it appeared larger therefore it'd help AF since I have a bigger area to focus on? No? Thanks for your comments and advices.
not really, it doesn't make anything larger, or appear larger, so it really doesn't help with AF so to speak, it'll just cut the edges off the image, so the active AF area stays the same, while the image size is reduced, so you might think that it helps with allowing the AF focus points to go all the way up to the edge of the frame....but in reality, you could use the exact same focus point, in the exact same shot, and just crop it to your liking in post, and that way you reduce the chance of cutting something off (especially if you're focusing that close to the edge of the frame anyways).
don't get me wrong, the 1.3x crop mode does have some advantages, like smaller file sizes, and with smaller files, you get a small boost in the fps, and I *THINK* a small increase in the buffer. another benefit of crop modes for example is what I use on my D800 at events, I use a crop mode that is in the correct final aspect ratio that I want to use if I'm shooting an event or something (I cover automotive events regularly and if I'm shooting in the final aspect ratio that I'm going to use in publication, it vastly reduces my time spent in post processing when everything is already the correct ratio). but alot of false claims and misunderstandings surround crop modes, and crop factors, and equivalent focal lengths, and stuff like that. I've even read several 'professional' reviews that make incorrect statements....