The K-3 has the newish auto focus system with more focus points, (though there's some question if it's really that much better than the K-5II), but still in the same basic pattern, improved metering, 8FPS vs 7 for the K-5, dual card slots, slightly higher viewfinder magnification, and slightly modified control locations and functions, probably just enough changes to make jumping from a K-7 annoying for a while, and shifting back and forth also a bit annoying. Probably a few more improvements that I don't remember. The only real minus, is that in video mode, AS is no longer sensor shift, but is now what I'd call electronic pixel shift. That was probably done to keep the code base between the K-3 and 645z from becoming too divergent, as the Digital 645 doesn't have a shifting sensor, but now the 645Z body does record video.

If all you were getting a K-5 variant for was increased resolution over the K-7 I wouldn't bother. However the K-5II/s have other improved features better metering and auto focus that actually works most of the time. The K-3 doesn't seem to be that much of a leap over the K-5 except for resolution and the extra AF points gives better granularity when specifying just what one wishes to focus on. Which seems to be the biggest downfall of the K-5II sometimes it decides to focus on the tip of a subjects nose, when the red dot appears to be centered on their eye.

On 7/22/2015 12:07 PM, Norman Baugher wrote:
Is there a big difference between the K-5 and K-3 other than resolution. There 
is definitely a big difference in price…

On Jul 21, 2015, at 4:26 PM, P.J. Alling <[email protected]> wrote:

If you're sticking with Pentax there's only one.  The K-3 or it's younger 
brother he K-3II which are probably functionally identical for your purposes.  
The K-3 can probably be had for a fairly sizable discount now and a somewhat 
bigger one in three to six months, based on passed history.

On 7/21/2015 4:13 PM, Norman Baugher wrote:
Of course I’m the Treasurer, I’m the only non-surfer in the group. Need I say 
more. (plus I’m great at managing other people’s money).
Different body with higher density sensors, never thought of that one. Then 
again, I’m not a digital guy. Suggestions?

On Jul 21, 2015, at 3:55 PM, mike wilson <[email protected]> wrote:

Hell's teeth, Norm!  They made you _Treasurer_?  I know Californians
have a reputation for gullibility but that is a whole different
planet.  Man.

Depending on your budget 8 -) you may find better value for money in
either an older FA lens or a newer body with a higher density sensor,
thereby allowing more of a crop.

On 21 July 2015 at 18:25, Norman Baugher
<[email protected]> wrote:
Hey guys, I’ve been lurking for a while, so this is my first post in some time. 
I’ve been working with a group of surfers in California who work with various 
charities. We surf and film events for special needs kids. Being involved, I 
turned the group into 501 (c)(3). I’m the Chairman of the Board, but want to 
get into the photo side as well. We have a team of photographers, but I of 
course want to shoot events as well, can’t help it. I’ve got a K-7 and a 
55-300/4.5 WR but judging from the last event, I think I might need something 
longer. Check out the website and have a look at some of the images - 
suggestions on something longer? www.malibuunderdogs.org
Norm



--
I don't want to achieve immortality through my work; I want to achieve 
immortality through not dying.
-- Woody Allen


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