Yes i think someone mentioned 30hz is the way to go ,the new mini rimfire sight at Scott C is rated at 30 hz but its near £700 and looks as big as a pencil.Was looking for something to spot foxes in the distance before lamping ,cant really run to a full Thermal scope ,my car cost half that TBH .Thanks for the heads up il have to get to a couple of shows and have a look see.ITAR sucks ,had a ifra red/starlight scope from the U/S about 10 years ago for buttons awesome kit but when it "died" couldnt replace as they are no longer allowed to export .Atb