What am I doing wrong?

I recently bought a Skywatcher Explorer 130P. This is a 5.1inch reflector
with focal ration F5.

I have two eye pieces - 10mm and 25mm and a x3 barlow.

I was observing jupiter last night on maximum mag (10mm and barlow - about
x195 I think) it looked big but I was unable to achieve a good focus. Using
different combinations I could achieve a sharper focus but without the
magnification to see better! Viewing conditions weren't ideal but I was
wondering - is this lack of focus down to the barlow?

What would be a better set-up with the equipment I've got or what new eye
pieces would anyone recommend. I have seen posts in other forums from people
with the same scope and they seem to be doing much better!

Thanks for any help you can give

Steve


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