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dpi

If I want to print a photo, what size does it need to be?

Jan 8, 2017 by Daniela Bowker 5 Comments
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I took the photo just down there from the deck of the ferry that took me from Auckland to the Coromandel Peninsular in New Zealand. My camera was in my lap and in one split second, everything came together to create that image. It looks almost as if I’ve shopped in the cruise liner, doesn’t it? I was travelling alone, and minding my own business, but two older couples struck up a conversation with me.

It was the camera that they noticed. We spoke about all sorts, but what I recall specifically from the conversation was one of women mentioning that she’d tried to have one of her photos printed by an online print company in New Zealand, but hadn’t been able to manage it. Whenever she uploaded it, the image was red-flagged for being too small. She wasn’t really sure what she was doing wrong, or what size her image needed to be so that she could print it.

Almost five years on from that February day and it occurs to me that between ppi, dpi, pixels, and megapixels, people are probably still confused by minimum image sizes for printing. This is especially so, given that smartphone photos are regularly saved at 72ppi, but printers prefer 300ppi. I decided, therefore, to go straight to the printers’ works and ask a selection of companies what their preferred sizes were for printing wall art (so that’s canvas or acrylic or any other type of medium that you hang on your wall) sized 20 by 30cm (8″ by 10″, roughly A4) and 40 by 60cm (20″ by 24″, roughly A2). Here’s what I learned.

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Does size matter? DPI (dots per inch) for printing explained

Jan 7, 2017 by Dunja Djudjic 2 Comments
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There are plenty of misconceptions about the number of pixels, resolution, image size and so on, which can make us quite confused sometimes. To make things worse, the terms DPI (dots per inch) and PPI (pixels per inch) are often used interchangeably, which makes the understanding even more difficult.

Essentially, DPI is important for printers. It’s a number of color dots printer uses to reproduce colors of the image. It’s also used for screen resolution, although PPI can also refer to screens as well. PPI applies to everything in relation to resolution and the size of a digital image.

In this video, you will see a brief explanation about DPI and how important is this value for printing big formats. How big is big enough? Does size matter at all?

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Udi Tirosh: from diyphotography.netUdi Tirosh is an entrepreneur, photography inventor, journalist, educator, and writer based in Israel. With over 25 years of experience in the photo-video industry, Udi has built and sold several photography-related brands. Udi has a double degree in mass media communications and computer science.

Alex Baker: from diyphotography.netAlex Baker is a portrait and lifestyle driven photographer based in Valencia, Spain. She works on a range of projects from commercial to fine art and has had work featured in publications such as The Daily Mail, Conde Nast Traveller and El Mundo, and has exhibited work across Europe

David Williams: from diyphotography.netDave Williams is an accomplished travel photographer, writer, and best-selling author from the UK. He is also a photography educator and published Aurora expert. Dave has traveled extensively in recent years, capturing stunning images from around the world in a modified van. His work has been featured in various publications and he has worked with notable brands such as Skoda, EE, Boeing, Huawei, Microsoft, BMW, Conde Nast, Electronic Arts, Discovery, BBC, The Guardian, ESPN, NBC, and many others.

John Aldred: from diyphotography.netJohn Aldred is a photographer with over 20 years of experience in the portrait and commercial worlds. He is based in Scotland and has been an early adopter - and occasional beta tester - of almost every digital imaging technology in that time. As well as his creative visual work, John uses 3D printing, electronics and programming to create his own photography and filmmaking tools and consults for a number of brands across the industry.

Dunja Djudjic: from diyphotography.netDunja Djudjic is a multi-talented artist based in Novi Sad, Serbia. With 15 years of experience as a photographer, she specializes in capturing the beauty of nature, travel, and fine art. In addition to her photography, Dunja also expresses her creativity through writing, embroidery, and jewelry making.

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