Just bought one, an issue with this scope is limited dioptre adjustment which for my eyes doesn't allow me to get the reticle sharp. I found a solution by finding a 30mm +2 close up filter fits precisely into the eyecup, and corrects the reticle into perfect focus. It does increase the mag very slightly, but its easy to wind it down a bit to restore the 10x if thats what you want.
Hope this helps others who have perhaps given up on this scope due to the limited dioptre adjustment.
Air arms HFT500, Prosport,
WH100SK Daystate Griffin