07-20-2010, 11:17 AM
[quote name='larsrc' date='20 July 2010 - 11:15 AM' timestamp='1279617327' post='1150']
I believe my own eyes over those calculations. If the viewfinder showed f/5.6 regardless of aperture, you wouldn't see any DOF effect of using the DOF preview button. I see a very clear effect. I'm guessing those calculations talked about using an f/2.8 lens.
-Lars
[/quote]
Well, no ,that is not exactly what I am saying. What I am saying is that you get about F/5.6 to start with. If you stop down further, you will get a view with even more DoF.
So yes, you will always see an effect in the viewfinder when you use the preview button.
Kind regards, Wim
I believe my own eyes over those calculations. If the viewfinder showed f/5.6 regardless of aperture, you wouldn't see any DOF effect of using the DOF preview button. I see a very clear effect. I'm guessing those calculations talked about using an f/2.8 lens.
-Lars
[/quote]
Well, no ,that is not exactly what I am saying. What I am saying is that you get about F/5.6 to start with. If you stop down further, you will get a view with even more DoF.
So yes, you will always see an effect in the viewfinder when you use the preview button.
Kind regards, Wim
Gear: Canon EOS R with 3 primes and 2 zooms, 4 EF-R adapters, Canon EOS 5 (analog), 9 Canon EF primes, a lone Canon EF zoom, 2 extenders, 2 converters, tubes; Olympus OM-D 1 Mk II & Pen F with 12 primes, 6 zooms, and 3 Metabones EF-MFT adapters ....