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focus points
Hi there, after reading the 350d manual it states to put a focus point over the subject press the shutter half way and re ajust the camera position to where you want it.....

1. if you put the focus point on the subjects eyes thaty should be best but ive had the occasional shot where some of the face is out of focus and if there are 2 or 3 people in the shot they may be out of focue.... this doesnt happen in all shots just some.

2. if shooting a group of 4 or 5 how would you use the focus points because you want everyone sharp not just one head.. are there other techniques to focus or use focus points......

Thisw is usuing the 18-55 and the evaluative metering mode..

Comments (10)

Shane Poole wrote:.

Hi there, after reading the 350d manual it states to put a focuspoint over the subject press the shutter half way and re ajust thecamera position to where you want it.....

You will need to hold the shutter half way if you are going to "Focus and Recompose". Maybe you know that..

1. if you put the focus point on the subjects eyes thaty should bebest but ive had the occasional shot where some of the face is out offocus and if there are 2 or 3 people in the shot they may be out offocue.... this doesnt happen in all shots just some.

2. if shooting a group of 4 or 5 how would you use the focus pointsbecause you want everyone sharp not just one head.. are there othertechniques to focus or use focus points......

You may need to increase your depth of field by using a smaller aperture (higher number). You will find a DOF table here:.

Http://www.dofmaster.com/doftable.html.

Indoors you almost certuanly will need flash to achieve the necessary depth of field unless the lighting is good..

Chris Elliott.

*Nikon* D Eighty + Fifty - Other equipment in Profile.

Http://PlacidoD.Zenfolio.com/..

Comment #1

If you haven't already selected the centre focus point only, you will find it easier to focus if you change to this option. If you have it set to Automatic Selection it may not select the focus point that you want..

I think that you select the centre focus point on the 350D by pressing the "AF point selection" button This is the button with the checkerboard pattern on it at the top right of the camera back - it is also used for reducing the size of the image during playback..

After pressing this button use the main dial to select a single focus point only - you may need to check the manual to find out how to do this..

Now when you want to focus only the centre focus point will show in the viiewfinder and will turn red when you have locked the focus. Use this centre point to select the exact point in the scene that you want to be in focus..

Chris Elliott's post has already explained depth of field.Chris R..

Comment #2

What problems does 3 focus points give you compared to 9 focus points??.

Help would be much appreciated..

Tom..

Comment #3

Sorry about the lack of info I gave:.

The 350d kit lense will have been at about 30-40mmi used 2 elinchrom lights metred at f8 and took the shot at f8i was sat arround 7/8 feet away frm the 2 children.

Hope this is enough info.. thanks..

Comment #4

If you're focusing on a group of people and only the face of the lead person is in focus (because of depth of feild issues) then you should stop your camera down to increase the depth of field. The higher F-stop numbers result in a greater depth of field and thus more areas in focus..

You will have to combine this with a shutter speed that stops movement (from you or them) to increase your chances of a sharp image..

TANK.

'Why is it everytime I need to get somewhere, we get waylaid by jackassery?' - Dr. Venturehttp://www.myspace.com/servantoflove.

Image control:Zoom outZoom 100%Zoom inExpand AllOpen in new window..

Comment #5

When shooting a single person at f/8 you should be able to get all of their face into focus, unless they are very close (within 5ft) and it's a telephoto shot (greater that 50mm on your crop body). Make sure the camera is focusing corectly on the eyes. It's best to use the focus point nearest the eyes as you'll move the camera less when recomposing the shot. Make sure the camera is set for single shot focus (non-tracking) and then you keep the shutter half-pressed until you actually fire off the shot..

For your group shot issues it's really a depth-of-field question... try this calculator to do some of the math yourself:.

Http://www.dofmaster.com/dofjs.html.

For a group of 4-5 kids only 7-8 feet from the camera even f/8 may not give you enough depth-of-field. It's probably best to aim at the subject that is second closest to the camera and to arrange the kids so there they're as close as possible...

Comment #6

When you focus on any subject the focus is 1/3 in front and 2/3 behind the subject. The more open your lens is the narrower your focus will be. If you shoot at f/8 or higher you will have more in focus. This also depends on how tight you shoot. W/A lens have a greater depth and Tele shots have the least. So, focus is dependent on the f/stop and the focal length of the lens you are using...

Comment #7

In shooting a group, you might want to turn on manual focus, and, without taking your fingers off the focus riing, turn it so the farthest person is in focus, back so the nearest person is in focus, and then adjust it finally to about half way between these two points..

IF the front person and back person are within the depth of field, it should turn out OK..

BAK..

Comment #8

Jon Lemke wrote:.

For your group shot issues it's really a depth-of-field question...try this calculator to do some of the math yourself:.

Http://www.dofmaster.com/dofjs.html.

Do people never read earlier posts in a thread. I gave a link to dofmaster 7 hours ago:.

Http://forums.dpreview.com/...forums/read.asp?forum=1002&message=27410613.

Are all earlier posters considered imbeciles who could not possibly have got the answer right?.

If a post has earlier answers I read them and then know what, if anything, remains to be said. If there is nothing left to say I do not post. Maybe I am in a minority but it seems highly conceited to me to assume that you are the only one capable of giving the correct answer when there are already 7 or 8 answrs to a post! Am I alone in this view?.

Chris Elliott.

*Nikon* D Eighty + Fifty - Other equipment in Profile.

Http://PlacidoD.Zenfolio.com/..

Comment #9

Chris Elliott wrote:.

Jon Lemke wrote:.

For your group shot issues it's really a depth-of-field question...try this calculator to do some of the math yourself:.

Http://www.dofmaster.com/dofjs.html.

Do people never read earlier posts in a thread. I gave a link todofmaster 7 hours ago:.

Http://forums.dpreview.com/...forums/read.asp?forum=1002&message=27410613.

Are all earlier posters considered imbeciles who could not possiblyhave got the answer right?.

If a post has earlier answers I read them and then know what, ifanything, remains to be said. If there is nothing left to say I donot post. Maybe I am in a minority but it seems highly conceited tome to assume that you are the only one capable of giving the correctanswer when there are already 7 or 8 answrs to a post! Am I alone inthis view?.

Chris Elliott.

*Nikon* D Eighty + Fifty - Other equipment in Profile.

Http://PlacidoD.Zenfolio.com/.

Not everyone reads every post before posting. Just relax...

Comment #10

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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