Hex / Allen key size

[David Smith]

Anyone know what size allen key I need to adjust the focuser tension on my Skywatcher Evostar 120? I think the smallest I have is 2mm (based on my rather crude measurement) but it is smaller than that. They are dirt cheap on ebay but I am unsure which size to order.

Thanks

[Steve Ward]

I'd guess at 1.5mm David , unfortunately got a dead battery in my vernier but eyes in between 1 and 2 ...   

I'd get a set of each metric and imperial if I were you , these are very good ... http://www.rowland-tools.co.uk/bondhus.html?rowland_product_type=205&unit=17

[Cozzy]

Yes it is 1.5 mil just check on mine.

Tim

[David Smith]

Thanks both, much appreciated.