Steve,
The Kowa 25x LER ( Long Eye Relief ) has 32 mm of ER. Way more than most eyepieces , where 18 - 20 is the norm .
As I have mentioned in the other threads I use the 25x LER on the Swarovski scope too ( I have two of them ) as the mounts are very similar ( although the other way around doesn't work unfortunately due to the length of the mount ).
CAVEAT - You do lose INFINTITY FOCUS. Focus distance is about 35 meters.
I can use the Canon G12 with it too which I like a lot.
Neil
As I mentioned earlier in this thread you can get no/little vignetting with the P7000 at wide zoom on a 30x eyepiece with decent FOV but it gets worse as soon as you start zooming. The problem is that this is only about 900 mm of magnification. This is not where digiscopers normally want to be unless you are shooting in the garden or large water birds.
For digiscoping you need about 1000 -2000 mm to be happy.
Neil