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Best focus technique
Hello all...

I am a newbie to DSLR and I bought my XSI just about 3 weeks ago..and I wanted to ask what's the best technique to acheive the best focus together with good composition?.

I've read already that in portraits for example one should focus always on the eyes and I also read that using the center focus point is best..so I want to ask what if I am shooting a portrait and I am using the center point to focus and it's somehow away from the eyes..so what's the steps to take exactly in this situation to have the best focus and the desired composition?..

Comments (6)

The simple focus and then compose method. Point the center sensor at the subject, press the shutter half-way, then recompose the image as you see fit (while holding the shutter). Fire..

It all depends on your background and what the camera likes seeing..

Akhalidi wrote:.

Hello all...

I am a newbie to DSLR and I bought my XSI just about 3 weeks ago..andI wanted to ask what's the best technique to acheive the best focustogether with good composition?.

I've read already that in portraits for example one should focusalways on the eyes and I also read that using the center focus pointis best..so I want to ask what if I am shooting a portrait and I amusing the center point to focus and it's somehow away from theeyes..so what's the steps to take exactly in this situation to havethe best focus and the desired composition?..

Comment #1

Theatrus wrote:.

The simple focus and then compose method. Point the center sensor atthe subject, press the shutter half-way, then recompose the image asyou see fit (while holding the shutter). Fire..

This works just fine with most all P&S cameras and you can get away with using a DSLR if your aperture is small enough. However, when using faster and/or longer lenses which reduce DOF, it is possible to focus on the eyes, recompose and no longer have the eyes in focus. Admittadly, this would be in extreme closeups, but it does happen..

This is why having a greater number of AF points is desireable. The less you move the camera after focusing the better.Chefziggyhttp://www.pbase.com/chefziggy/lecream..

Comment #2

Theatrus wrote:.

The simple focus and then compose method. Point the center sensor atthe subject, press the shutter half-way, then recompose the image asyou see fit (while holding the shutter). Fire..

It all depends on your background and what the camera likes seeing..

Akhalidi wrote:.

Hello all...

I am a newbie to DSLR and I bought my XSI just about 3 weeks ago..andI wanted to ask what's the best technique to acheive the best focustogether with good composition?.

I've read already that in portraits for example one should focusalways on the eyes and I also read that using the center focus pointis best..so I want to ask what if I am shooting a portrait and I amusing the center point to focus and it's somehow away from theeyes..so what's the steps to take exactly in this situation to havethe best focus and the desired composition?.

Thanks for the answer but on the other hand most of the times when shooting portraits one uses shallow DOF so recomposing will cause maybe major focus errors..so how to compat that?..

Comment #3

This is why your DSLR has more than one focusing point. Shift the focusing point so that the closest one to the part you are focusing on (usually the eyes) is the one you use. That will reduce or eliminate the focus/recompose error..

Read my blog -> http://radio.weblogs.com/0101365/..

Comment #4

This only works if and when you chose which focus point is used. I you let the camera chose which point if in focus then it ain't gon'na work..

If you think that makes sense, then you must have read someone else's post!..

Comment #5

I checked the specs for the camera, and it has the ability to separate the AF function from AE & shutter release as other Canon cameras do. You can assign AF to the '*' button via custom function 10. Use center point AF, position it on the subjects eyes and press the '*' button to focus. Hold this button down/in and recompose for composition, press the shutter release and both AE & shutter release will occur..

If you set custom function 10 to '1', you can half press the shutter release to set and lock exposure. I use this for shots in which I want to pick a different part of the scene for AE..

The steps are:Press * - lock AF on the desired part of the subject/scene, hold the * buttonhalf press shutter - lock AE anywhere in the scene I want, hold itDepress shutter release the rest of the way - done.

It may sound complicated, but it's not, you'll get used to this rather quickly and it gives you a lot of flexibility..

Page 7 of the DPR review explains how this works.http://www.dpreview.com/reviews/canoneos450d/page7.asp.

Best regards,Doughttp://pbase.com/dougj..

Comment #6

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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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