Dear Jochen;
Since M8 has crop factor issue, you definetely can't guess exact frame when shooting. So you -sometimes- can not realize how much you approached to the main subject for critic shots. Secondly, as I mentioned earlier, I want to use higher shutter speed than general recommended values -since I want pin sharp images. To get that, -Since I hate noisy upgraded ISO pictures- I want to solve the light issue with lens, instead of ISO setting.
Thanks for your comments by the way.