Size comparison of FE 4/2470 on A7 vs Olympus 12-40 f2.8 on GX7

Started Feb 6, 2014 | Discussions thread
Lab D Senior Member • Posts: 6,938
It is very simple

Dennis wrote:

Lab D wrote:

As for understanding exposure think of lens apertures like this. A fat lady and a thin lady are laying on the beach. Who will get sun burnt faster? Answer: both will burn/tan the same despite the fat lady having 4x the skin area.

Why ?

Why think of exposure like that ?

It is very simple.  Take a specific lighting situation.  If a P&S camera needs F/2.8, a shutter speed of 1/60th, and ISO 400, then your E-M1, A7R, RX10, etc. all can use very similar settings to achieve the same exposure.  If you decide that you RX10 has " a bgigger sesnor" and try to lower the ISO or rasie the shutter speed, then one of the other 2 setting will need to change accordingly.  If you don't the result will be under-exposed.

 Lab D's gear list:Lab D's gear list
Panasonic FZ1000 Nikon D600 Panasonic Lumix DMC-GH4
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