Originally posted by dreilly When the K-7 was announced a while back, I took notice. Small, metal-bodied, weather-sealed, not 4/3? I was intrigued, to say the least. The idea festered for a while. At that point, I was shooting Canon.
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So I returned to the idea of Pentax. The lenses look a little pricey. But I gave it a week of research and thought, read lots of reviews, and decided to give it a try $100 back on the kit and any lens you order with it was an incentive. So I bought the kit and a FA 50/1.4.
Just got it today. I am impressed. The ergonomics are very good. The D700 killed my wrist after a six hour shoot and some 2000 actuations! Plus I don't have to worry about flying, burning brandy shorting out my camera. (I know the D700 is weatherproof, too, but those seals looked a little like foam sponges...
There's a lot packed into this little body to learn. Anyway, wanted to introduce myself. I'll post some images or links to them once I take the K7 around the block.
In the meanwhile, can someone point me to a good sticky or web page that thoroughly explains the green button usage?
Welcome Doug. You'll find these pages very helpful, though I don't have the link to a green-button-sticky at hand. Somebody else will know...
You will probably find, that Pentax cameras sport very good ergonomics, similar to film SLRs. So this suites experienced photogs, but is probably less important to newbies.
The main use for the green button, by the way, is metering in M-mode (full manual settings of expsoure time and aperture). It is a kind of semi-Automatic: You choose the aperture you want and then press the green button and the camera takes a light reading and sets the time (all in M-mode). YOu can ofcourse deviate from that sugestion, which is helped by the typical under-/overexposure scale in the viewfinder.
The green button is especially helpful, when you use old lenses, which do not have the electrical contacts in the bayonet mount (anything older than the A-lens series, for history and detailed lens infos, see here:
Summary of the K-Mount Evolution, Names, and Features)
As these old lenses rely on mechanical levers to transmit aperture information between lens and camera body and the current DSLRs do not have that mechanical coupling, the camera cannot know, which aperture you choose on an old lens via its aperture ring - and you can't choose the aperture electronically.
So, when you use an old lens, you set the camera to M-mode (and allow the use of the aperture ring in the camera menue!) choose your aperture on the lens and then press the green button. The lens will be stopped down and the camera takes the reading at the actual aperture and sets the expsoure time accordingly. So you can have a semi-automatic operation even with 30 years old M-lenses.
There may be other functions of the green button, but these two are the most important ones to me.
Ben