"John Carruthers" wrote in message
...
Viewing Jupiter, every time I tried to use the Barlow, the
image just degraded to the point it was almost unusable.

May have been due to the seeing and not the Barlow ? I can't always
use mine.
jc

Probably a bit of both.....

Doesn't stop me wanting to buy new bits of kit though ! Although I can't do
much about the seeing, I can certainly upgrade my optical path. I wish i
wasn't so much of a gadget junkie, but....