Thanks Peter!!!
Yes I have the ISO on manual at 100. I forgot to mention that and yes the f stops relate to aperture just shows how thick that I am !!!! LOL
I'll try setting the focal length up in increments until I get to 105 just to see how it goes as I can always delete if I don't like the results.
I wouldn't mind looking at the photoshop books as anything that I can learn can only be of benefit. I'll pm my address !!!
Thanks for the tip on the focus I'll bear that in mind !!!