Seems like I need to hunt down one of those then.
I consider a camera without a proper MLU a toy.
I tested my Nikon D 3000 at 1/2 second shutter speed just now
with a small glass of water on top of the hot shoe and using a
remote control to trigger the shutter, and it suffers from mirror slap.
Lots of ripples on the surface of the water.
Nobody's going to make me believe that this kind og vibration isn't
going to affect sharpness unless shutter speeds are way faster than
what is needed for shooting in low light situations.
Therefore, cameras without MLU are expensive and unusable toys in
such conditions. I also tested my M/F Bronica SQ-A which has a mirror
the size of a barn door, and it vibrates even though the mirror is locked up,
which worries me. Now I know why I get blurred images at shutter speeds
at 1/2 sec. and longer. Also did put a bean bag weighing four pounds on the
damned thing and it still vibrates which makes me wonder how much weight
I need to put on top of it to make it rock steady. I've heard three times the
weight of the camera as a rule of thumb. I guess a car battery would do the
trick