KEH has the 350.....your wish answered.
> On January 19, 2017 at 4:26 PM Ken Norton <ken@xxxxxxxxxxx> wrote:
>
>
> > Which Zuiko would you recommend ?
>
> You WOULD have to ask. So, I just did a little empirical testing.
>
> The 50/1.4 would have the most intense heat spot, but it's small and
> the working distance is short.
>
> The 100/2 doubles the diameter of the focused light and gives more
> working distance. Definitely a worthy.
>
> The 300/4.5 gives the best diameter of focused light and the working
> distance is quite good. But not bright enough for instant combustion.
>
> Not tested, but extrapolated from the 100/2 test and 300/4.5 test, I
> would be perfectly happy with the 250/2 or 350/2.8. I think either one
> would be just the ticket for detonating ants.
>
> AG Schnozz
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