Originally posted by Kennygee Long time Pentax user . . . have been looking at the Pentax line up . . . . I shoot mostly candid Family and landscape and wildlife/birds, little to no video.. . . The K-3ii looks nice but might wait for the upgrade model if it might come in the $1000.00-$1200.00 range. . . . Any thoughts and recommendations appreciated!
welcome
I have a standard response to such questions for members who are from the US
consider using one of the photography rental companies
I have had good success with lensrentals.com but there are others
LensRentals.com - Rent Lenses and Cameras from Canon, Nikon, Olympus, Sony, Leica, and more
spend a little $ and do your own " testing " and if you find a favorite, then look for that equipment, new or " experienced "
if interested in " experienced " be sure to check out the Forum's market place
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I have found these charts to be helpful [ although you may already know the info contained in them ]
Pentax Lens Compatibility Chart
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Pentax bayonet lenses labeled "SMC Pentax" are referred to as "K" lenses in the table below. Other Pentax bayonet lenses have the lens designation as a part of their name as in "SMC Pentax-FA."
Note that "star" lenses work like their "non-star" counterparts: DA* lenses work like DA lenses, FA* like FA, F* like F, A* like A, and M* like M.
Exceptions: FA and F "soft" lenses behave like M lenses in terms of metering.
The Pentax Camera Lens Compatibility Chart
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Pentax K-Mount Lens Series Explained: The differences between various Pentax lens series
In a nutshell
There are several series of Pentax K-mount lenses; the ones currently being produced include the DA (digital), DA L (cheap digital kit), D FA (full-frame, digital optimized), and FA (full-frame) series. While all Pentax K-mount lenses ever produced are compatible with all current Pentax DSLRs (in some cases with restrictions in that not all exposure modes of the camera are supported by old lenses), there are significant differences between each lens series and each has different features. Furthermore some of the newer lenses do not work with older cameras. We'll be exploring the differences between the various K-mount series lenses in this article. Read more about specific K-mount lens/camera compatibility here.
The DLSR designation below encompasses the mirror-less K-01.
http://www.mosphotos.com/PentaxLensesExplained.html