Agency stock work(Image size)

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Steven Buglass - 26 Aug 2003 15:54 GMT

I was just wondering if it is possible to do stock work with a Nikon D100 as
agencies seem to be looking for images arround the 30meg in size, which
looks like about a 10Megapixel camera to me....

Does anybody submit pictures off a 6Megapixel camera to stock agencies and
are they happy with the size.

Thanks

Steve

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Martin - 29 Aug 2003 17:16 GMT

> I was just wondering if it is possible to do stock work with a Nikon D100 as
> agencies seem to be looking for images arround the 30meg in size, which
[quoted text clipped - 6 lines]
>
> Steve

Not sure about the other agencies, but if you look at the FAQ for Alamy you
will find the following :

"48 MB minimum. All digital camera images must be captured on a digital
camera capable of producing files of 14MB and upwards. Please then
interpolate the images to a minimum of 48MB using professional upsizing
software. We recommend Genuine Fractals (http://www.lizardtech.com) for the
best results. We reserve the right to reject over manipulated images.
Maximum file size of 70 MB."

That would seem to mean to me that thay will take images from any camera
capable of 5Mp up...

On a somewhat related subject, can anyone explain to me why our 6Mp Canon
EOS10D produces raw files which are only around 7Mb - that seems like a
whole lot of compression for what should be a completely loss-less format...

Martin

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David Littlewood - 31 Aug 2003 20:07 GMT

>> I was just wondering if it is possible to do stock work with a Nikon D100
>as
[quoted text clipped - 24 lines]
>EOS10D produces raw files which are only around 7Mb - that seems like a
>whole lot of compression for what should be a completely loss-less format...

Presumably it is similar to TIFF, which is also lossless. A quick
calculation suggests the compression involved to get a 6.3 MP image at
24-bit colour into a 7Mb file is only about 3:1. TIFF, using lossless
LZW "dictionary" methods of compression, can compress files by up to
10:1, so the size reduction of Canon's RAW files seems quite modest.

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David Littlewood

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