On 03.6.7 5:57 PM, "Alan Chan" <[EMAIL PROTECTED]> wrote: > If that silver shell isn't soft, I don't know why? Besides, I believe > they used hardened steel on K/M/A lenses (along with some plastic for A), > not brass.
I said hard anodized "surface". Aluminium is inherently a soft metal. Once you scratch down to the bare metal, be careful, it's soft. Re K/M barrels, I thought they were of brass those days. I cannot think they use hardened steel as it would be a bit costly to machine. The metal barrel does not have to be super strong as it does not bear much structural stress but should give easier machinability. But I could be wrong. Cheers, Ken
