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Old 18th April 2012
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Printing size Help?

Hi guys

Can you help I have a B/w photograph thats 248 ppi what size can i print up to with out loosing to much detail? and is there anyway of increasing the print size at all?

thanks
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Old 18th April 2012
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Re: Printing size Help?

What's the resolution of the image? e.g. 4000 x 3000 pixels?

Nicked from a webpage......

A typical 10 megapixel camera produces images that are 3872 x 2592* pixels. 
If you multiply 3872 by 2592, you get 10,036,224 or 10 million pixels.
To find the largest photo quality image you can print, simply divide each dimension by 300:
3872 / 300 = 12.9 inches
2592 / 300 = 8.64 inches
If you are not entering your images into an external competition or magazine, you can reduce the resolution to 250ppi or even 200ppi. Most inkjet printers can produce a quality print at 250 or 200ppi. Be aware that image editing software like Photoshop interpolates between pixels so that you can print larger, so it may not be obvious that quality is being compromised!






* Approximate Resolution. Actual pixel dimensions vary from camera to camera.



**At 250ppi, good image programs can carry out some pixel interpolation and print at
A3 without appreciable losses.



*** At 200 ppi losses may be seen due to interpolation and picture may lose sharpness
and appear fuzzy, depends on picture type, printer and contrast etc.
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Re: Printing size Help?

Thank Derek,

So if you crop the image then you loose resolution as well?
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Old 18th April 2012
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Re: Printing size Help?

Quote:
Originally Posted by Crippledsandwich View Post
Thank Derek,

So if you crop the image then you loose resolution as well?
Well if you crop an image the sides become shorter, therefore less pixels, therefore smaller printed size.

Or if you wanted to print at the same size which you had decided was the maximum for an uncropped shot, then the cropped shot would probably show some degradation.

Most software will allow you to increase the size by interpolation and if based on a bicubic method they are usually pretty good. There are some software products (such as Genuine Fractals - which I have not used) which have an enthusiastic following.

Of course if you are printing on a fabric or textured surface then the grain of the media will reduce resolution anyway.

Nick
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Re: Printing size Help?

Also worth remembering that normally the larger you print an image the further away you view it from, so you can easily get away with a lower ppi..... distance equals perceived sharpness. Imagine what a billboard poster is printed at and how sharp it looks from the other side of the road!
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Re: Printing size Help?

thanks guys thats really helped me out
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Old 19th April 2012
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Re: Printing size Help?

Chris it really depend on if you are home printing on a inkjet or lab printing.

Lab prints tend to give better results with lower resolution files.

I have had 16x12's done from a cropped 5MP file (E-1) and regularly have 20x16 inch prints done from 10MP files.

Here's the resolutions needed for lab prints giving you the minimum and preferred pixels needed.

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Re: Printing size Help?

Very informative Paul, I find pro printers especially on canvas get remarksable results, I just tried this firm and results are good http://www.orbitprint.com/canvas/
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Re: Printing size Help?

Wow Paul that's great you're slowly becoming my photographic guru will all the advice you keep giving me
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Re: Printing size Help?

Thank you for the link as well Yorky
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Re: Printing size Help?

I've had really good quality canvasses from Snapmad (at very good prices indeed) and they also have a list of acceptable and optimum resolutions for print sizes:

http://www.snapmad.com/about.php
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Re: Printing size Help?

Interesting thread folks. Some good stuff here which I'm intersted in as I'm about to start and try to get some sort of quality prining going at home. I've realised it is actually quite hard to do well for a wealth of reasons.

Thanks for posting

cheers

hec
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