5d Mark II Focus Screen with "thirds" lines

[mark.carline]

I know there is focus screen that canon make that cam be fitted to a 5d Mark II as follows:

http://www.warehouseexpress.com/buy...sing-Screen-Eg-D-Grid-Precision-Matte_1028681

Problem is that I would prefer one that has 2 horizontal lines rather than 3 as i think it might be usefull for composition and "the rule of 3rds".

Anyone know if there is a 3rd party one that can do this ?

 

[the ghost]

£30 then a fitting charge if you cannot do it yourself.
think i will do it by my EYE'S

 

[Nod]

I did this in answer to a similar question a while back, possibly on another forum.

Red lines are as I see the grid through my Nikon 'finders (Canon and other brands may differ) - on quarters rather than thirds. Green lines are on thirds. The rule of thirds is only really a rule of thumb (based on the Golden Ratio) and is not written in stone, so a slight deviation from the prefect third line isn't going to kill anyone!