I have just fitted the SFP version to a HW100 and the quality of the glass is very impressive. Focuses well even at 10m on full mag, I love the honeycomb sunshade it's much more convenient for me than a tube extension type. It is compact in lenght but a bulky scope in diameter though, with the lens covers on the objective end measures nearly 60mm meaning higher mounts than most other 44mm scopes.