Stan, if I may add my two cents to your equation, but a sensible amount
of patience/waiting applied at proper moment in time can lead to much
honorable advancement.
I am talking here about SDM problems and probable rather serious
solution thereof that Pentax could roll out soon enough. Also, perchance
K-7's successor is near and your update from K20D to whatever comes next
will be more than just one step.
This is, at least, what I would have done, were I in your shoes.
As for A 50/1.2 - I might be tempted...
Boris
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