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03-17-2008, 05:44 PM   #1
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How to get more DOF??? Help

Ok, was out shooting today and was wondering how to get more depth of field out of my shots????? I shot this with a 55mm pentax lens.



03-17-2008, 05:46 PM   #2
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stop down the lens. What aperture is that? The potential problem is you'll need more light or higher iso.
03-17-2008, 06:29 PM   #3
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you're shooting at F1.7 on the lens that will give you a really shallow DOF if you change that to an F8.0 or higher towards the largest F number you will get a deeper DOF so more of the background will be in focus
03-17-2008, 06:38 PM   #4
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Depth of field is affected by aperture, focal length, and distance to the subject. A shorter focal length will give greater dof, and being farther from the subject will give greater dof.

03-18-2008, 07:03 AM   #5
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Bryan Peterson's "Understanding Exposure"
Good read on all this silly f-stops/shutter speed/ISO stuff
03-18-2008, 07:08 AM   #6
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Original Poster
QuoteOriginally posted by egordon99 Quote
Bryan Peterson's "Understanding Exposure"
Good read on all this silly f-stops/shutter speed/ISO stuff
Thank you
03-18-2008, 07:12 AM   #7
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You had plenty of light! As everyone else has stated, close the aperture. you could get away with a shutter speed of 1/60 or so! that's a good book too!
03-18-2008, 08:19 AM   #8
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QuoteOriginally posted by rmtagg Quote
Thank you
You may find useful: Online Depth of Field Calculator and similiar tools.

BTW, how did you happen to know the DoF acronym, but not that stopping down extends it?


Note:
Depth of Field is based on the visual capabilities of the human eye.
If you rather are pixel-peeping and want all pixels within the DoF to be sharp, the circle of convolution must match the pixel size.
I.e., for a K20D with 5 micron pixel size, select a "Canon PowerShot A510" or alike as your camera


Last edited by falconeye; 03-18-2008 at 08:29 AM. Reason: Added pixel size note
03-18-2008, 08:27 AM   #9
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rmtagg,

I actually like that photo a lot. The one petal that's perpendicular to the lens looks great and the out of focus (oof) area looks really nice.

Every lens has a sweet spot where it performs best. Usually f5.6 or f8. It's different for every lens. That being said, you can stop down way past that to f22 (like those orchid photos from the other day) and get heaps of area in focus. Your lens at these small apertures suffer from 'diffraction'. Basically diffraction is the extra light bouncing around inside your lens that will deteriorate image quality.

Here's a good link:
Understanding Lens Diffraction

luminous-landscape is a pretty good sight to browse as well.

It all doesn't NEED to be in focus. Some photos are better without a huge DOF.

Did you decide on a macro lens?

Cheers, Matt

Edit: you have flowers out already?!? You lucky dog you.
03-18-2008, 11:52 AM   #10
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Understanding Exposure is one of the best books on photography I could have ever bought.
03-18-2008, 12:30 PM   #11
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QuoteOriginally posted by loudbay Quote
rmtagg,

I actually like that photo a lot. The one petal that's perpendicular to the lens looks great and the out of focus (oof) area looks really nice.

Every lens has a sweet spot where it performs best. Usually f5.6 or f8. It's different for every lens. That being said, you can stop down way past that to f22 (like those orchid photos from the other day) and get heaps of area in focus. Your lens at these small apertures suffer from 'diffraction'. Basically diffraction is the extra light bouncing around inside your lens that will deteriorate image quality.

Here's a good link:
Understanding Lens Diffraction

luminous-landscape is a pretty good sight to browse as well.

It all doesn't NEED to be in focus. Some photos are better without a huge DOF.

Did you decide on a macro lens?

Cheers, Matt

Edit: you have flowers out already?!? You lucky dog you.

I bought one today from someone here The Tamron 90 macro I am very excited and can't wait till it arrives So be on the look out for pics! we only have crocuses but I am calling a few local places to see if they have anything else out. If all else fails I will be calling the local florist!
03-18-2008, 12:33 PM   #12
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QuoteOriginally posted by falconeye Quote
You may find useful: Online Depth of Field Calculator and similiar tools.

BTW, how did you happen to know the DoF acronym, but not that stopping down extends it?


Note:
Depth of Field is based on the visual capabilities of the human eye.
If you rather are pixel-peeping and want all pixels within the DoF to be sharp, the circle of convolution must match the pixel size.
I.e., for a K20D with 5 micron pixel size, select a "Canon PowerShot A510" or alike as your camera
I have only had my camera a few months so I guess I got carried away shooting after someone here told me how to get my K10d to work with older lenses with out being in the A position. However, my dumb question got me some very useful information which I realy really appreciate.


Thanks everyone for being so helpful and sharing some great info.
03-18-2008, 07:10 PM   #13
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QuoteOriginally posted by rmtagg Quote
I have only had my camera a few months so I guess I got carried away shooting after someone here told me how to get my K10d to work with older lenses with out being in the A position. However, my dumb question got me some very useful information which I realy really appreciate.


Thanks everyone for being so helpful and sharing some great info.
There is no such thing as a dumb question. There are an infinite number of dumb answers, some of which I have contributed myself.
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