one more extension quiry

[brooksdj]

                                        
                                Hi all.
First off,got an email from Aaron.Hes on holidays for the next two weeks. That will 
buy me
some time 
to take some more photos.lol

Second,i ts a lovely day today,i have it off and plan to shoot some closeup flowers.I 
want
to use the SP 
with the K adaptor and screw in some M42 tubes.I realize some exposure factors will be
needed.Is 
there a rule of thumb.Probably only the first and or second tube.Is 0ne stop per tube a
good starting 
place??

I'll check back this afternoon.

Dave