Do pixels matter? What 20" x 30" prints reveal.

Started Jun 14, 2013 | Discussions thread
rwbaron
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Re: not what i've seen
In reply to bronxbombers4, Jun 16, 2013

bronxbombers4 wrote:

LaszloBencze wrote:

I currently have a show of 38 20" x 30" prints appearing at the Viewpoint Photographic Art Center in Sacramento. Most of the pictures were taken with either a 5D MKII or 5D MKIII. However, some of them come from the Canon 1D MKII and 1DMIII which are not full frame and have about half the number of pixels of the 5D cameras (8 & 10 megapixels vs over 20 for the 5Ds).

What I noticed is that I could not tell which pictures were taken with the lower pixel count 1D cameras. They do not stand out as obviously inferior. In fact all the pictures look good and are indistinguishable in terms of sharpness or resolution.

Now I'm sure that there are benefits of the 20 megapixel cameras. And I do own two of them. But my point is that real life photo situations with large areas of bland texture or out of focus areas do not reveal such differences. This is a bit of a surprise for me but a reassuring one.

If you happen to live in the Sacramento area, you're welcome to look for yourself. The gallery is at 2015 J street and is well identified with signage.

All I can say is could tell apart 8MP from 20MP prints even on an 8x11 never mind 20x30!

I printed at 720PPI on crisp paper.

Plus you have a lot more freedom to crop the 20MP images when you need to and they sure give a lot more reach for stuff like sports and especially wildlife.

I'm confident you have a lot more experience with this than I but why are you printing at 720PPI? I did a comparison on my Canon i9900 and could see little advantage going above 240 and in many cases 180. The commercial printer I work with who has the latest and biggest Epson and Canon printers has never asked for a file more than 240PPI. To print at 720 you have to upres the files dramatically even from a high res sensor which would cause all sorts of artifacts.

Bob

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