8,2 MP isn't a high resolution requirement....

8,2 MP isn't a high resolution requirement....

Not for a camera and probably not too bad for renders with simple shapes, textures and lighting but some stuff takes hours even @ 6MP and just not practical for the kind of returns that the site appears to produce.

there were long discussions here about that, its actually 8.4 MP

Probably correct, was looking a memory size > 24,000 K but dividing by 1024 the MP dimensions would have to be bigger.

once again this brings up the point on the higher end cameras such as the Nikon D800-  yeah, I know folks like Jarvis can take a Barbie camera and out shoot me but now even some of the MS companies are requiring higher mp which exist on the better cameras. My Canon D20 is now obsolete thus headed to the market looking for a better camera...

I don't think they have a rule against upsizing.

I don't think they have a rule against upsizing.

In fact they allow upsizing explicitly.

But the only time I had a rejection at Alamy is when I sent a batch of upsized photos. Never had a rejection submitting photos of the right size natively.

Note that they also have a list of cameras that they like or they don't.

24 MB = (24*1024*1024) bytes

Since each RGB colour pixel requires 3 bytes, 24*1024*1024/3= 8388608 pixels

Ain't it easy?

PS:
For 4:3 ratio (Olympus), x * 4/3 x = 8388608 --> x = (8388608*3/4)^0.5 = 2509 pixels on the short side;
for 3:2 ratio (Nikon, Canon), x * 3/2 x = 8388608 --> x = (8388608*2/3)^0.5 = 2365 pixels on the short side;
for square pictures, x = 8388608^0.5 = 2897 pixels on each side.

Yeah - I was wondering why it was taking 3 bytes per pixel on 8 bit colour but suppose the RBG channels need 8 bits each per pixel?  Of course if they just said 8.4MP it would cause a lot less confusion for their submitters and the condecending explanations on the site wouldn't be needed. 

I can do that size but just not willing to invest the render time needed on my present kit.

Back in the day, I used to take my Canon 20D images and upsize them to a 48mb TIFF file to submit to Alamy.

Upsize your images to 3604x2403 and you'll be fine as long as they were sharp out of the camera.

Of course if they just said 8.4MP it would cause a lot less confusion for their submitters and the condecending explanations on the site wouldn't be needed. 

Why would they say 8.4Mp when that random number is totally irrelevant?
It's 24Mb uncompressed minimum. No Mp is specified.
That figure is shown at the bottom left of your screen in PS, which makes it easier to check that I haven't cropped too far if using an unusual ratio. Far faster than doing a w x h calculation to see if the Mp are enough.

Liz, you are right about the 24 MB uncompressed, but I am afraid you are confusing compressed MB (not Mp!) as in your .jpg example above with Mp.

8.4 Mp - as an approximation of 8388608 pixels - is not totally irrelevant, it's just another way of saying 24 MB uncompressed.

Sorry, I was wrong, but it was, somehow, a misreading not a confusion. 
Anyway, I just checked and my old 350D output files of 3456 x 2304,and although if it wasn't for stock I would no doubt still be using it perfectly happily, I wouldn't like to be using it for stock nowadays. Too much hassle with 400ISO files, which is 'normal' outdoor ISO around here.
I do have a couple of 350D files upsized to 48Mb at Alamy just for an experiment (from Africa!) When my 5D2 was being replaced, I was using the 40D and upsizing (which I don't really think is fair to the buyer), no doubt at 400ISO, but after a couple of SOLD rejections I soon stopped (andthe 5D2 came back). They'd probably be OK at 24Mb, but I reshot them.
I never quite got over the irony of how I worked hard to be able to afford the 5D2, and not too long after that they lowered the min. size to 24Mb!

Quote from: microstockphoto.co.uk on October 09, 2012, 00:29

Liz, you are right about the 24 MB uncompressed, but I am afraid you are confusing compressed MB (not Mp!) as in your .jpg example above with Mp.

8.4 Mp - as an approximation of 8388608 pixels - is not totally irrelevant, it's just another way of saying 24 MB uncompressed.

Correct and everyone (well nearly) understands image dimensions in pixels.  On the other hand, everyone does not understand how this directly affects the image size in RAM (where a plain colour takes up the same resource as something with loads of detail) so folks end up sending tiffs.

You can't send tiffs to Alamy, AFAICS.
In the 'prepare your files' guidelines for new contributors it says:
"Images from at least a 6 megapixel DSLR or more. See here for: Recommended digital camera list
JPEG�s saved at a high quality setting (i.e. Photoshop level 10 or above).
Alpha-numeric file names ending in .jpg.
RGB files, not single channel greyscale or CMYK.
Uncompressed file sizes of more than 24MB. This means you should make your JPEG file from an 8 bit file that is over 24MB. If you have a camera that is capable of producing an uncompressed 8 bit file of over 24MB then leave it that size."

And in the Upload Images page it says:
"Please check that your images meet our technical criteria and are:
High-quality JPEG saved as "Baseline ("Standard")"
Minimum uncompressed file size of 24MB. Our blog post explaining file size JPEG file size explained
Alpha-numeric file names ending in �.jpg� ..."

To be honest, if this is causing you so much grief, you'd go into a decline in the Manage Images procedure, which is slow and tedious beyond belief, unless you upload batches of similars (not advised as it could pull down your Alamy Rank).

Quote from: ShadySue on October 09, 2012, 06:34

... the Manage Images procedure, which is slow and tedious beyond belief...

"Amen" to that.

Absativly Posilutly True!

What little EXIF that is read, goes where it doesn't belong. I consider it everything manual entry. Tedious is precisely what it is. On the other hand, what they take isn't judged on content, which I find worth the hours of manual keywording. Think about this. Every image needs to be edited and data added at least once. For Alamy, most of the shots, are only going there, so that's the once?

Sometimes I make a text file to cut and paste, so I don't have to type everything in, online. But no matter what, it is TEDIOUS.


Lower Left Elements

Enlarged View of same

Same information iRfanview


This has always been a point of confusion. Alamy file size requirement is Uncompressed File Size the other one, on the left, is file size on disk, and both are MegaBytes. Not MegaPixels.