Originally posted by alvaro_garcia Do you think the 645Z is worth the purchase if I already own the K1?
Only you can answer that question. 1. What are you using your camera(s) for, and how? 2. Do you already have any lenses for it? 3. What is the nature of your need? 4. What kind of income do you have?
If the answer to #2 is; Yes, 2 or more; and the answer to #4 is "upper middle class, no kids in private school/college, no dependents with illness (any age)" or "wealthy", then unqualified yes, whatever the answers to #'s 1 and 3.
If the answers to # 2 is "no", and #4 is "just middle class", then I'd say you need to answer #3 as "compelling professional/artistic need", and #1 as " a use that requires the best possible IQ/DR/ISO combination, and/or file malleability, and/or ruggedness, and/or large printing, and/or ability to use in any conditions/time of day/locations, or combinations thereof".
This is how I made my calculations, and how I made the very, very happy decision to get a Z, and a bunch of lenses as well. And, btw, a K1 as backup.