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EOS 350 Problem this time
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I’ve a problem with my own camera this time. I’ve just realised that all the shots I’ve taken in the last month or so are much smaller than normal. Normally shots from this camera are 48″ x 32″, but all the shots lately are coming out as 14.4″ x 9.6″ only, and I’ve no idea why. Help anyone?
I’ve just realised it is shooting at 14.4″ x 9.6″ when in RAW (which I’ve only recently started to shoot in) but full size in jpeg
Inches is a somewhat meaningless value when it comes to image size. If you’re shooting RAW, you should be getting images that measure 3456×2304 pixels, which at a resolution of 300ppi is 11.52″x7.68″ and at 240 ppi it’s 14.4″x9.6″ so there’s nothing to worry about.
I am getting that resolution on the images alright Thorsten, I’m just thinking that if I decide to do large prints, will they not work you know?
Well, if it worked for you before with JPEG’s then it’s going to work for you with RAW files. In fact, an image derived from a RAW file and processed correctly should yield a better image than one originating from a compressed JPEG, particularly when it’s enlarged.
Here’s a little more info to help you get your head around this:
Your sensor is 3456 x 2304 pixels.
When you’re shooting JPEG, your camera is outputting images at 72 ppi which works out at 48″ x 32″ if you were to print it as it is.
When you’re shooting RAW, your camera is outputting images at 240 ppi which works out at 14.4″ x 9.6″ if you were to print it as it is.
But you don’t print the images as they are. For starters, if you were to print at 72 dpi, you’re print would look pretty horrible. The “normal” resolution that is used in printing is 300 dpi, which would give you an image of 11.5″ x 7.7″. I say “normal” because the resolution changes depending on your requirements and other criteria. For example, the Fuji machines that most minilabs use print at 300dpi. A large poster sized print only requires 240dpi. A billboard size image requires even less resolution.
If you start thinking of your images in terms of pixel size, it will all become a lot clearer. If you want to print a typical 10″ x 8″ image you will need an image of 3000 px x 2400 px (that’s 10 x 300 and 8 x 300).
I hope I haven’t confused you even more!
Now I’m just confused as to how I printed in large format from jpeg :)
Before sending my pics to the printers I’ve always boosted the dpi up to 300 (most of my prints have come from jpeg) and I’ve printed regular shots at up to 24″x16″ and panas up to 50″ with no degradation in quality.
I’m just going to have to send one of the RAW images into be printed and see what happens I think.
I realise this is probably something basic that I should know, feel pretty stupid for having to ask :oops:
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