07-20-2010, 07:42 AM
[quote name='wim' date='19 July 2010 - 11:28 PM' timestamp='1279574890' post='1136']
Rainer and popo are both right.
There is one caveat with modern cameras however, although this was also valid to some degree in the film age. Unless you use an -S type focusing screen (for Canon anyway), an Eg-S for the 5D Mark II, which is also called a high precision matte, or something similar on any other camera, you will perceive a DoF through the view finder as if the lens is stopped down to approximately F/5.6.
[/quote]
Surely what it looks like depends on what the maximum aperture of the lens is? To be extreme, I doubt an f/1.2 shows the same DOF as an f/5.6, and I'm pretty sure an f/8 (e.g. mirror lens) will not look like an f/5.6. Wouldn't it be more correct to say that it looks like about two stops slower (assuming you were talking about f/2.8 lenses?
-Lars
Rainer and popo are both right.
There is one caveat with modern cameras however, although this was also valid to some degree in the film age. Unless you use an -S type focusing screen (for Canon anyway), an Eg-S for the 5D Mark II, which is also called a high precision matte, or something similar on any other camera, you will perceive a DoF through the view finder as if the lens is stopped down to approximately F/5.6.
[/quote]
Surely what it looks like depends on what the maximum aperture of the lens is? To be extreme, I doubt an f/1.2 shows the same DOF as an f/5.6, and I'm pretty sure an f/8 (e.g. mirror lens) will not look like an f/5.6. Wouldn't it be more correct to say that it looks like about two stops slower (assuming you were talking about f/2.8 lenses?
-Lars