Even though we ARE Nikon lovers,we are NOT affiliated with Nikon Corp. in any way.

English German French

Sign up Login
Home Forums Articles Galleries Recent Photos Contest Help Search News Workshops Shop Upgrade Membership Recommended
members
All members Wiki Contests Vouchers Apps Newsletter THE NIKONIAN™ Magazines Podcasts Fundraising

Please explain "downsizing"....

ericbowles

Atlanta, US
10633 posts

Click to send email to this author Click to send private message to this author

"RE: Please explain "downsizing"...."

ericbowles Moderator Awarded for his in-depth knowledge and high level skills in various areas, especially Landscape and Wildlife Photoghraphy Writer Ribbon awarded for for his article contributions to the community Donor Ribbon awarded for his very generous support to the Fundraising Campaign 2015 Nikonian since 25th Nov 2005
Thu 09-Feb-12 02:36 PM

What that is really referring to is applying high megapixels to a print or a standard output size.

You can make the dots of ink smaller, in which case noise becomes insignificant. But printers already have their limits and your optimum remains 260-300 dpi.

So instead you would "downsize" the image - combining 3 pixels of a 36 MP image into a single pixel for rendering in a normal print. This means that noise is a small amount of the result, and virtually disappears.

DxO uses a standard size print to evaluate all the different cameras with different sensor sizes. That print size is 30x20cm or approximately 12x8 inches.

You could pick an alternative size - 30x20 inches inf you wanted. That requires upsizing. That would mean that each pixel of a D3 needs to be converted to 2 pixels - and any noise would result in twice as much noise.

You would not be throwing anything away - just evaluating based on a common output. But if you want to compare images from two FX cameras, the idea is you should compare the same size print from both rather than a much larger print on a camera with more pixels.



Eric Bowles
Nikonians Team
My Gallery
Workshops

Nikonians membership — my most important photographic investment, after the camera

A general, generic topic Please explain "downsizing".... [View all] , hollingwD80 , Thu 09-Feb-12 01:20 PM
Subject
ID
Reply message RE: Please explain "downsizing"....
1
Reply message RE: Please explain "downsizing"....
2
Reply message RE: Please explain "downsizing"....
3