So far, of four lenses tested, my largest derivation was the FA50 at  
-4. I had a couple pluses and a couple minuses.
Paul
On Mar 8, 2008, at 12:06 PM, Dario Bonazza wrote:

> By using Tim Jackson's chart (thanks Rick for reminding me that!)  
> I've got
> the following calibration settings for the K20D:
>
> DA 12-24 = -6
> DA 16-45 = 0
> DA* 50-135 = -3
>
> FA 31 = -10 (and it's not enough!)
> FA 50/1.7 = -10
> FA 50/1.4 = -10
> FA* 85/1.4 = -9
> FA 24-90 = -6
>
> F* 300/4.5 = -4
>
> So my lenses are all front focusing, and not a single one is back  
> focusing.
> Or maybe my K20D is acting that way.
> It will be interesting to know how much variation one can find with  
> the same
> combos made up of different items.
>
> Cheers,
>
> Dario
>
>
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