yes, you can quickly focus on a subject instead of using manual focus from the beginning. This is handy for macro shots, for example. This is suitable for close-up shots of subjects such as flowers, insects, food or small objects. Try the following steps to activate macro: -Set the mode dial to SCN (scene selection). -Turn the control dial to select Macro or the desired setting. -If you set [Mode Dial Assist] to [On], you can select the desired settings after changing the position of the mode dial.
The RX100 allows you to focus on a subject 45mm away from the lens. So, in a sense, you can get very close to the subject to frame it tightly. However, Sony only mentions a macro mode in the SCN selection menu, and this is more of an optimised setting than a function that would boost the lens.