I can not get what I need.

I wish were in perfect focus objects A and B but not the object C.

If I set focus well on A, i lose focus on B

If I set focus well on B, i lose focus on A

i can't have A and B at the same distance, but they are really close

can someone help me

thanks

I have no idea if Poser works this way, but if you were using a camera, you would need to increase your depth of field. You do that by decreasing the size of the lens aperture (increase the f-stop or f-number) or decreasing the focal length of the lens.

I am rendering at the moment, so I can't check the options available in Poser...

Edited to add:

So it looks like you can change the focal length and f-stop in camera settings. You want a shorter focal length and/or bigger f-stop to get decent DOF. Assuming it works in Poser as it does with real cameras, that is. I've never tried it because I don't have the patience for long render times.

Thanks, but I tried, I just can not focus on both objects A and B

A lens can only focus at one distance. In front of and behind this distance the subject is out of focus.

BUT - depending on the aperture of the lens - the degree to which things are out of focus varies. There is a distance range - dependent upon and controlled by the aperture - that appears to be in sharp focus. This is what gets referred to as 'Depth of Field'.

The smaller the aperture (i.e. the larger the f number) the wider this area of apparent sharp focus is.

Poser tries to replicate this physical phenomenon, using a 35mm camera as a basis.

You can read up on all the physics and maths and come up with a formula to achieve what you want, or you can use this 'cheat':

Determine the distances from the camera of both A and B. Set the focus distance about one third of the way between A and B. (so if camera to A = 1 metre and camera to B = 1.3M, set focus distance to 1.1M).

Set the aperture to around f11 or f16.

This is based on real-world experience. If it doesn't quite work first time in Poser-land, increase the f-number rather than change focus. And note that if you set the f-number high enough, C will start to come into focus too.

ok, many thanks

The camera's lens is set at 50mm. The only parameters I changed in this test were the Focus Distance and Aperture - the values are shown, you'll need to look at the bigger image for it to be useful.

The conclusion is that Poser does the depth of field thing accurately, at least for a 50mm lens. The top 3 images are to test the advice I gave above; let me briefly explain the last two.

On number 4 I set focus distance to 1000M (because there's no 'infinity' settingin Poser), and I'd expect a real-world 50mm lens focused on infinity and set to its narrowest aperture (f64 is a bit extreme) to have everything in apparent sharp focus (unless it was a few centimetres from the lens).

For number 5 I've focused just in front (15cm = 6 inches) of the closest Andy and kept the same narrow aperture, and as I'd predict from a real lens, closest Andy is just coming into sharp focus while those at 6M and 10M are soft.

So there you are. The key to creating depth-of-field effects is in knowing where to set focus and which aperture to use; and if you have photographic experience you can use that in Poser quite predictably.