Quote Originally Posted by waving_odd
Would the reduction be too much by your experience?

Not for me.


Quote Originally Posted by waving_odd
Heard froma well known online filter reseller that B+W's 0.6 is the most popular ND filter in photographic work. So is 2 stop a more popular choice?

That makes sense.


Quote Originally Posted by waving_odd
Currently there is a B+W XS-Pro UV 010 on my 85mm glass

Be aware that flare and glare is increased by having a UV filter (no matter how good the coatings are).


Quote Originally Posted by waving_odd
Of course I can take away the UV to avoid stacking. But it's really inconvenient. [img]/emoticons/emotion-6.gif[/img]

I definitely suggest removing the UV when you use ND, otherwise the flare will be even worse.