Speedy Manual Focusing?

[drolo61]

And we used to think twice before clicking the shutter. I may have missed many shots I can get today, but the keeper rate was so much higher...

 

[Artifex]

I was checking-out for focus screens and I found this. It seems like a focus screen with split image, just like what was in film camera, like your AE-1 or my K-1000!
Does anyone has any information on those? Are the any good? Is this a scam? Because, even though they are expensive, slip image focus was pretty much the best way for manual focus IMO. Thanks!

http://www.focusingscreen.com/product_info.php?cPath=21_135&products_id=1204

Or http://www.ebay.ca/itm/180-horizontal-Split-Image-Focus-Focusing-Screen-For-Canon-EOS-5D2-5D-Mark-II-/271183492503?pt=US_Viewfinders_Eyecups&hash=item3f23cbb597&_uhb=1#ht_1431wt_1144

 

[mrsfotografie]

I was checking-out for focus screens and I found this. It seems like a focus screen with split image, just like what was in film camera, like your AE-1 or my K-1000!
Does anyone has any information on those? Are the any good? Is this a scam? Because, even though they are expensive, slip image focus was pretty much the best way for manual focus IMO. Thanks!

http://www.focusingscreen.com/product_info.php?cPath=21_135&products_id=1204

Or http://www.ebay.ca/itm/180-horizontal-Split-Image-Focus-Focusing-Screen-For-Canon-EOS-5D2-5D-Mark-II-/271183492503?pt=US_Viewfinders_Eyecups&hash=item3f23cbb597&_uhb=1#ht_1431wt_1144

I've no personal experience with these, but would be worried that a third part focusing screen would affect the metering in a negative way...

 

[Sporgon]

My guess is that these are 1 series screens cut down to fit 5D, 5D mk2/6D,