So what I mean is, we live in a fast changing world and NO ONE has the time to chill when buying something new, to read the manual; and this is the result. I know it buy myself, maybe you too
It is pretty presumptuous to suggest that he has not read the manual ... but even if he read the manual, he would have not got the answer to his question. I just went through the HDR section of 5D MK III manual and there is nothing there that can answer his question (except for a nebulous reference to shutter speed in the third point of page 176 of the manual in HDR section).
There are plenty of occasions when the situation we face is not addressed in the manual ... those are things you learn as you make more photos & mistakes or when we ask others who might be familiar with those situations. That is where forums like Canon Rumors come in handy.
I know several good photographers who are into landscape photography but know very little about portrait work, but they won't get all the technicalities required for portrait work in the camera manual. So it is perfectly logical to approach forums like these where help is available.
Let us be more kind to help or provide constructive criticism rather than assume people are lazy to read camera manuals.
5D MK III, 16-35/2.8 L II, 24-70/2.8 VC, 24-105/4 L IS, 70-200/2.8 L IS II, 100/2.8 L IS, 40/2.8, 50/1.4, 85/1.8, 150-500 OS, 600EX-RTx2, ST-E3-RT, Rokinon 24/3.5 T-S, D7100+18-300 VR, YN568EX, 055CXPRO4+468MGRC2, 190CXPRO4+322RC2, Gorillapod Focus+496RC2, CamRanger, B+W filters, Konova K3/31.5 etc