does anyone use the EG-S focus screen on a 5DII with f1.4 lenses to MF? I'd be interested to hear their esperience with them
I do (5D mkII + 35/1.4; 50 /1.4 and 85 /1.
. With the EG-S you have an easier time telling when your focus is off. But it really does not help that much when it comes to telling if focus is spot on @ f/1.4. Live view @ 5x or 10x is the only way to really know you got it right at those apertures. Of course, that might not be possible to do in actual shooting.
Also your viewfinder gets darker and that makes it harder to handle f/4 zooms in low light.
A way to get higher odds of getting your focus right is to have a flash to help with infra red AF-assist and use the focuspoint where you want your picture sharp - even if it is not the centre point. You donÂ´t have to fire the flash, but the AF-assist really helps out. I canÂ´t figure out why there is no AF-assist in the body. I would love that for low light, no flash situations since an external flash makes the camera heavier and it also makes the camera bigger and more intimidating to some subjects. Finaly its harder to keep your camera haning over your shoulder at a party with a flash attached.
Also, something Im still trying to get used to, is that the slightest movement from you or your subjekt might mean you loose focus. FF and fast lenses is demanding in a way I did not understand when I upgraded from my 30D and f/4 zooms.
So - go ahead and use the EG-S, it does help but does not do wonders.