robert_c_gates

<p>My Canon 24-105 mm lens doesn't have a DOF scale and I like to use it instead of buying a standard lens with a scale. Also, I like framing the scene and checking things out in Live View.<br> When using lens DOF scales in the past I've been puzzled when the scale indicates the DOF goes to infinity and then I find that distant objects that I would consider to be in the zone of infinity are actually somewhat out of focus.</p>

<p>Many thanks for the helpful information and advice. I also posted this question to another photography forum and while the info was not always in 100% agreement, I think I learned enough to use Live View effectively now with my Canon 6D & 24-105 mm lens. This is my plan. If I’ve got something wrong, please let me know.<br> <br> I’ll be setting my camera on a tripod to shoot landscapes in Aperture Priority mode, starting at f/8, ISO 100 and focal length about 24 to 28 mm, usually. I’m trying to get reasonably good focus in both the foreground and background.<br> <br> First I’ll move the magnifier to the foreground, probably about 1/3^rd of the way back unless there is something closer that has to be in focus. I’ll magnify that part of the scene 10X, focus my lens on that spot and press the DOF preview button to verify that this spot will be in focus with the lens stopped down to f/8. (I’m really not sure that I need to do the DOF preview for this initial foreground focus?)<br> <br> Next I’ll move the magnifier to the part of the background that I want to have in good focus, magnify 10X, and hold down the DOF Preview button to see if this area is in focus with my original focus setting. If it is, I’m OK. If not, I’ll go to a smaller f-stop like f/11 or f/16 and go through the same routine as I described above until the depth of field is acceptable to me.<br> <br> I was told that the camera will meter at the location where the focusing rectangle was last placed. So I’ll return the screen to its normal, non-magnified state and move the rectangle to a location in the scene where the light is neither very dark nor very light, but about average. Then I’ll take the picture. <br> <br> Does anybody see any problem with this? If it works I would prefer this method versus dealing with depth of field tables, calculations, etc.</p>

<p >I have a Canon 6D with 24-105mm lens and have a question about using manual focus in Live View. Assume I am shooting a landscape in RAW with Aperture Priority f/8 and ISO 100. Let’s say I’m trying to compose a photo using the 10x zoom/magnifier to get a sharp focus on the foreground. After I have the foreground in focus, I then want to see if the background will also be in focus. Can I just move the zoom magnifier so it located on the background and observe whether the background is in focus or not—or-- do I have to hold down the depth of field preview button while viewing the background in order to get an accurate view of the focus on the background? Thanks very much for any help on this.</p>