Kar....I use the Anamorphic prism pair....combined with these lenses from O-Like...
http://www.o-like.com/index.php?main...index&cPath=55
405/450nm laser coated collimation lens /glass/three layer @ $ 7.39ea
While this lens does clip the beam...a small amount....like about 5% output reduction....
IMNSHO....it is the BEST for collimation of the mm 445 nm......
It doesn't matter if your secondary corrections are Dave's cylindericals.....or his Anamorphic prisms....
THIS collimation lens gives me the tighetest beam !!!
As to the question of Anamorphic Prisms vs the Cylinderical lenses.....I have always used the Anamorphic prisms...with the 445's
..and find them to the eaisest to set up. Loss is about equal with either....BUT....there is a " sweet spot " for both systems...
With the prism's....if you attempt to magnify the fast axis too much....you will have a noticable drop in power !!
With the Cylindericals....there is a VERY small sweet spot for placement distance between the Plano Concave and
Plano Convex lens....+/- .1mm....you can see the farfield geometry divergence open up !!!
Take away....the cylindericals are more demanding to set up....so....why screw with them ???
I will add....that some PL'ers have had issues with the Anamorphics and power loss ??? I have used Dave's prisms....and have had no issue with PO loss.
Good luck !! CDBEAM=======>