Originally posted by sazzie I am trying to capture a basic narrow aperture shot of my little boy with an out of focus background and have turned the dial to Av and set the aperture to between 2 and 4 depending on the shot. all the results seem to capture him and the background in full focus--ie ap seems to be wide open. am i missing something?
Getting a sharply focused target image with an out of focus background is a difficult task with the X90 because of its small sensor design, but it can be achieved with a bit of fiddling.
Step 1: Set up the target (your little boy) where you want him, and estimate roughly the distance between the camera and your son. Make sure the distance from your son to the background is at least four times (or more) the camera to target distance. So if you are holding the camera and you are 2,5 metres away from your son, the background must be 10 metres or more behind your son.
Step 2: Set your exposure to centre-spot measured brightness.
Step 3: Set your zoom to 5x which equates to 130mm (35mm equiv) which is good for portraits. When you move the zoom lever under the shutter release button, the zoom level indicates on a bar at the bottom of the screen, but also shows the actual value on the right. Make sure you get above 3.7x but do not exceed 5x. If you cannot frame the shot, move closer to, or farther away from, your son but keep the target to background distance at least four to five times more than the camera to target distance.
You cannot possibly get a blurred background when you are zoomed out to wide-angle. Anything more than about a metre away is at infinity and will be in focus, obviously including any background.
Step 4: Select Av mode and dial the e-dial all the way to the left. At a zoom of 5x the largest aperture you can set is F4.0 and it should have a small arrow to the right of it. Keep the ISO as low as possible and don't even try this in bad lighting conditions. You need good light.
Step 5: Set manual focus and focus carefully using the four-way switch with the focus point aimed at your son's eye. When you have a crisp sharp focus don't stop. Focus even closer until the focus just starts to look a tiny bit fuzzy. You may need to experiment by taking a few shots at slightly different focus settings until you get exactly what you want.
The problem is that your X90, even at F/4, probably has a large enough depth of field that everything say 1,5 metres in front and 1,5 metres behind the target is in sharp focus. By using manual focus you can shift that "focus zone" forward so that everything 2.5 metres in front and only maybe 0.5 metre behind is in focus, helping to blur the background.
Step 6: Take the shot and then press the viewing button and enlarge to check if the image of your son is sharp and the background is out of focus as you want.
The more you experiment, the better the results you will get. Its not an easy or quick process but once you get used to it you can preset some of the settings. Good luck.
If you have the facility you can probably get a good result using post processing software. On-One Software's FocalPoint does a nice job if you are careful.