Thanks guys, that last one is with the k3, the rest with K5,
Might look into getting other ir filters. To try out false colour and maybe the 850/890 for more contrasty, deeper black, mono shots. The r72 is mainly for mono shots anyway. It's interesting how light works.

Thanks again
Derek

That's grand John, I understand that camera models and makes respond differently to ir as they all have different ir blockers on the sensor.i originally posed the question in case anyone else had come across this and knew why it was, or a work around or that my method for the K3 was incorrect.
There's no hassle.
Cheers
Derek

As you can see John there is a huge difference, and what if I don't want to go mono.
The K5 allows me to set custom wb.
To get back to my original question, what am I doing wrong that I can't seem to set it on k3. Or does the k3 not allow this ?

Cheers Garreth , yea they do seem to go together, don't know why.
There may well be a lean to the left on the last one, it's a tricky one. The tower steps in as it rises and the perspective from which I took the shot. I have a feeling that the tower is leaning, if you have a look at the ground where the grass meets the base of the tower. As far as I can tell looking at the church the grass should be level not leaning to the right. I've tried to balance the 2 but maybe I should tilt the ground to straighten tower.
Cheers
Derek

Hi, here is an example of auto wb on K5 and custom wb on K5. These have just been resized, nothing else.
So as straight out of camera as i can get.

Auto wb

IMGP6796smallpu by dr.shutter, on Flickr

Custom wb on K5


IMGP6798smallpu by dr.shutter, on Flickr


IMGP6790smallpu by dr.shutter, on Flickr

Slight difference.
Derek

How it seems to work, to me anyway (I might be wrong) is like this,
Custom wb set by taking overexposed shot of bright grass, as bright green foliage is white in infrared bw, when you take a shot with the external filter on it recognises that the greens are supposed to be white ish and removes the red colour cast.
I'll post an example of both in a min when I get to the pc.

Derek

You might be right on the length of time, I'll try shortening it. I was leaving it open for 30 secs. That was giving me a white image,, iso ramped up and lens wide open.
I'll see what happens when I try it.
I can set wb in pp but would like to have it in camera too as the K5 can do this. It's hard to know what you have when it's all red.
Thanks
Cheers Derek.

I have been messing about with an IR filter here are a couple of my attempts, Still have lots to learn around this. Any tips appreciated.

Having trouble setting custom wb with the ir filter on K3, it just keeps saying unable to complete, any ideas as to what im doing wrong. im going to wb settings, custom wb, holding the filter over lens, pointing at the grass and 30 sec later unable to complete ?

Any thoughts welcome.
Derek

A really worthy winner, and a cracking portrait.