Thank you didn't knew that John since I thought F-number was only a ratio.

Yes sorry about that Nigel I take my words about the metering back, so it is TTL what you mean?

The lens does send focus distance to the camera but it's quite rough so it can not be used for focusing, the K-mount was never designed for that.
That means you need to adapt the lens to work with such system and all in all it might cost you a fortune.
Even then such system has drawbacks, sonar can not be used everywhere since it has limited range and it doesn't go through glass and such.
Then with infrared, there are remotes that sends out infrared and there are other sources like a flame for example so the system wouldn't know what to do.
There are other situations to think of where these systems wouldn't work.
We can of course but a real radar in the camera... might not be so healthy though

Then again such a system cost money and if it's only to make the live view work better it isn't worth it i believe.

The contrast AF is used by many video-cameras so the technique isn't really new.

So the model saved the photo in this case

Really though, thank you John, was and still is my first and only shoot.
Might have wanted to fill in the harsh shadows, certainly on her neck and use make up for the highlights but somehow I do get away with it since it still looks good.

We're also still waiting for the barbecue btw!

There are active auto focus systems think of sonar and infrared, the problem is though that the camera needs to know the focus setting of the lens precisely as well.
If the camera knows the subject is 10 meters away but has no idea what focus distance the lens is, its quite useless.

About Off The Film metering it can not be 100% accurate or not as accurate as TTL I believe.
Every lens is different by construction, the number of elements, coating, etc. so you've quite some variables there, how are these calculated in the measurement?

They look very good Martin, nothing really bad to say.
Maybe only that the first image is a bit soft, out of focus probable but the rest looks great.
Really like the bokeh the lens produce.

Thank you Amin.

I see what you mean but the problem is that I find her back too short then and it's bend quite strange to my eyes as well so my mind can except it, sorry

Quickly did some adjustments as response to Mike's comment.

[IMG]http://i282.photobucket.com/albums/kk244/Anvh/_IGP8498-Edit-Edit-2.jpg[/IMG]
Use the brush tool in Lightroom and lowered the exposure a bit.
Is it better like this?

Thank you Mike, was one of the side steps I took taking portraits.
Quite like it but I'm to shy to do it to be honest.

I can tell you that Lightroom says her forehead isn't blown out.
I've tried to bring the exposure down but you lose the highlights in her hair because of that but her forehead pretty much stays the same.
Next time I'll use some foundation for the highlights.

Looks once again great Amin, I truly have no idea what you do with that smoke but it looks amazing.

I see a girl bending backwards moving her hands in her hair while wind blow over her.
Her buttocks is the lowest part of the smoke, then you she her back curling backwards, the hands in her hair (she has very long hair) you can even see something like an ear.
Then the lines over her body is the wind that blows her hair up.

Have being playing a lot in Lightroom lately and I've redone some photos.
This is already quite an old one but never really did something with it so my question is do you like this effect?
Any other comment and advice is of course welcome, I'm here to learn after all.

[IMG]http://i282.photobucket.com/albums/kk244/Anvh/_IGP8498-Edit-Edit.jpg[/IMG]
K10D + DFA100mm
ISO 200
1/80 sec
f/2.8
Lighting... sorry can't remember

btw does this fall in the flat, boring, pedestrian, predictable, unassuming, dull and flat out knock me out with a VALIUM the size of a HOCKEY PUCK images Ben was talking about? link