I have a question or two....
I shoot a little bit of everything. Mainly landscapes and night photography. I understand that DMF are not good at night photography / long exposures.
It is a very specific use I have in mind. Basically I would like to be able to capture a bracelet entirely in focus in one shot without having to shoot multiple shots for focus stacking etc.
Any advice would be greatly welcome.
First off, the long exposure thing is not true. The P45+ and the IQ260 both offer long exposures of up to 1 hours with out any noise (now getting that done with out any stars from lights may not be possible
). I would dare say that any of the backs will out perform any DSLR with long exposures too, so long as you do not go outside of their exposure limit.
MD format does have the same defraction problem as what you get with the D800, meaning that the image starts to soften past f/11. You can use tilt to adjust the focal plan so the entire front of the ring is in focus at the same time, but the background and probably part of the back side of the ring with be out of focus. Also, MF has less depth of field due to the larger sensor.
The RM3Di has very precise focus, and focus stacking should be easier. However, one thing that I do not like about macro photography with the R is that in order to focus, the lens is moved. For what I shoot, architecture, this does not matter. But when you are shooting macro and moving the lens closer to the object to focus, thus increasing the distance you need between the lens and sensor to focus continuously, you are kind of working against yourself.