Comments on: Controlling Depth of Field http://www.lensrentals.com/blog/2009/04/controlling-depth-of-field Photo/video thoughts from the largest rental house Thu, 20 Jun 2013 07:59:00 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Phil Thornton http://www.lensrentals.com/blog/2009/04/controlling-depth-of-field/comment-page-1#comment-26265 Phil Thornton Tue, 25 Dec 2012 23:08:05 +0000 http://localhost:6081/news/2009.04.05/controlling-depth-of-field#comment-26265 Q: Why would a photographer would zoom from 35mm to 85mm and then step back 30 feet to make the subject appear the same size in the sensor? A: To include less of the background in the picture. No? Just saying - I'm no physicist. Q: Why would a photographer would zoom from 35mm to 85mm and then step back 30 feet to make the subject appear the same size in the sensor?

A: To include less of the background in the picture.

No? Just saying – I’m no physicist.

]]> By: Feng Chun http://www.lensrentals.com/blog/2009/04/controlling-depth-of-field/comment-page-1#comment-25791 Feng Chun Thu, 13 Dec 2012 08:55:10 +0000 http://localhost:6081/news/2009.04.05/controlling-depth-of-field#comment-25791 Interesting enough, regarding the basic rule 3 of DOP, Canon has a different opinion: "You will usually choose the focal length to suit the subject rather than to suit the depth-of-field. However, the accepted rule is that you get more depth-of-field with wideangle lenses than with telephoto lenses. In fact, this rule is misleading. What actually happens is that a wideangle lens magnifies the subject less than a telephoto lens, which means that more of the image appears sharper. A simple test will show that if you take two photographs of the same subject from the same position with a wideangle and a telephoto focal length, then enlarge the centre of the wideangle image to match the view of the telephoto image, the depth-of-field will be identical. " Quoted from: http://cpn.canon-europe.com/content/education/infobank/depth_of_field/depth_of_field.do Interesting enough, regarding the basic rule 3 of DOP, Canon has a different opinion:
“You will usually choose the focal length to suit the subject rather than to suit the depth-of-field. However, the accepted rule is that you get more depth-of-field with wideangle lenses than with telephoto lenses. In fact, this rule is misleading. What actually happens is that a wideangle lens magnifies the subject less than a telephoto lens, which means that more of the image appears sharper. A simple test will show that if you take two photographs of the same subject from the same position with a wideangle and a telephoto focal length, then enlarge the centre of the wideangle image to match the view of the telephoto image, the depth-of-field will be identical. ”

Quoted from: http://cpn.canon-europe.com/content/education/infobank/depth_of_field/depth_of_field.do

]]> By: Michael THornton http://www.lensrentals.com/blog/2009/04/controlling-depth-of-field/comment-page-1#comment-16251 Michael THornton Sun, 29 Jul 2012 09:40:49 +0000 http://localhost:6081/news/2009.04.05/controlling-depth-of-field#comment-16251 Hi Roger, Regarding your comments on Hyperfocal distance charts Since buying a Nikon D800 I find that the old standard COC of 30 no longer works. I did read that the COC should be twice the size of the sensor pitch, in the case of the D800 2 x 4.7 = COC of 10 Readjusting the charts to use this COC of 10 results in much sharper images, the downside being that the DOF is now really restricted for landscape use. I suppose thats the penalty of using hi res sensors? Regards Michael Hi Roger,
Regarding your comments on Hyperfocal distance charts
Since buying a Nikon D800 I find that the old standard COC of 30 no longer works.
I did read that the COC should be twice the size of the sensor pitch, in the case of the D800 2 x 4.7 = COC of 10
Readjusting the charts to use this COC of 10 results in much sharper images, the downside being that the DOF is now really restricted for landscape use. I suppose thats the penalty of using hi res sensors?

Regards
Michael

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