 Kristi Seanor |
Canon Elan 7n focusing points I just got a Elan 7n for Christmas and I am having problems with the focusing points. I cannot find help in the manual. Does anyone out there know how to focus on more than one object (making more than just the center square turn red)? I am using an 85mm 1.8 lens to take portraits and thus far taken a few of my labrador. Her nose is in sharp focus but the ears are out, I am assuming because they are farther away.
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Alex Cabrall |
The symtoms you described hint at poor depth-of-field: choose a small aperture (bigger f/stop), to get more of your lab in focus. as for changing focusing points, the best way to do it on the 7n takes some work to set up. Find your manual, and flip towards the end where all of the Custom Functions are described. You want the one about "focusing point selection": set it to the function where the cross pad selects the point, and the "AF point selecton" re-sets everything to the center point. This way, changing focusing points on the go is a breeze, and it makes the 7n so much more fun to own. Hope this helps.
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Jon Close |
The camera lens can only be set for a single focus distance, so generally only one focus sensor will be active at a time. To get more of the scene in apparent focus, you need to increase the depth of field by using a smaller aperture (larger f-number). At close focus distance with the 85mm lens at f/1.8 or f/2 the depth of field (range of apparent focus in front and behind the point of focus) can be less than an inch. The Portrait mode will select these very wide apertures because for a human face that's enough. To get a dog's long face in focus from nose to ear you'll need to set f/4 or f/5.6 (use Av mode). You can check the range of apparent focus by utilizing the depth of field preview feature. With stationary subjects you can also use the A-DEP mode, which will automatically set the aperture and focus distance to get the desired near and far feature in focus.
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Kristi Seanor |
Thank you both very much for your responses.... I greatly appreciate it!!! Off to shoot some more!!
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Kristi Seanor |
Ok, I found the custom function that will allow me to change the AF points but I still cannot manage to focus an object placed behind another and render BOTH in focus. I tried using a smaller aperture and also by using that * button to lock a focus. After I push the *, refocus on the farther away object and press the * again, the last object I focused on is in focus instead of both objects. UGHHH. I am frustrated!!
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Jon Close |
Normally, the * button (thumb-button on the upper right of the camera back) locks exposure, not focus. If you've set custom function 4 to "1", then AF starts with the press of the * button and will "lock" when you let it up and don't press it again. The view in the viewfinder is normally with the lens at its widest aperture, regardless of the value you have set. The diaphram doesn't close down to the smaller aperture set until the shutter button is pressed (mirror flips up, aperture closes down, shutter opens). To see the effect that the smaller selected aperture has on depth of field, you need to utilize the depth of field preview - a small button on the left side of the lens mount. When the lens closes down, the view will be darker, but let your eye adjust and you will see the greater range of "in-focus" subjects.
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