The Minolta Rokkor 58f1.2 seems to be glued to my 5DMkII for quite a while now.
I find it difficult to focus using it with the close up lens anywhere between f2.8 and f1.2
The close up lens seems to make the image go soft at those apertures.
Sometimes makes for an interesting effect.
This doesn't happen with out it, and/or using tubes.
It is very clear then.
Dang, just got 4 more lens in to adapt/convert.
It's fun though, when you have the time to play with them.
Thanks Edd. Looks like you are back up to 100% or close to.
The tubes are good fun, especially with the Roki. The DOF can be a challenge mind, and catching the focus right is not so easy if you are "between tripods" like i am.