i do it in a single step in photosohp -

edit > image size >

then make sure you use Bicubic Smoother

Make that three for three 

Thanks for the advise 

Make that three for three 

Make it four... never had a rejection from the default PS resize, going from 8MP to 16MP.

Now life is much easier with my 21MP camera

My first batch was rejected cause I made it too large. My calculations were off and I produced 90MB files :-) Now my second attempt is in QC. I used 5200 pixes for longest side which gives around 51MB

If you use the script available from the PTWiki site (http://photoTechniquesWiki.com), you can easily attach it to an action or droplet and then it's dead easy to create an upsized copy of your image at precisely 48MB.

I have an action which runs the script then saves the resultant upsized image in a 'submit to Alamy' folder.  I have created a droplet from this action.  Then when I have a batch of images ready, I just drag them (or the folder that contains them) to the droplet and photoshop does the rest for me - I end up with a folder ready to upload to Alamy.  Job done

Thanks for the info.
I have done an action too and works very well 

I usually upsize my 5D files with Canon DPP RAW software. In the batch window I set the longer side of the image 5020 pixels, and export that to 16 bit tiff (which is in the last stage converted to 8bit jpg in Photoshop).

Does the script at http://phototechniquesWiki.com work with PS CS? I get "Syntax error Line 5 -> #target photoshop"
 

that's ok, thanks. I'll try again if I every get round to upgrading!

Hello everybody,

As far as I can read, many of you seems to do it in quite a hard way....?

Of course this depends intirely on each and everybody's workflow.....
I normally view my files in Bridge... double click on my RAW (NEF) witch opens the build in RAW converter in CS3. 

At this stage - as the FIRST thing, I upsize from 12 to 17.5 MP.

It seems to a general opinnion that the upsizing should take place as early as possible! And above all, before ANY post processing.

When doing like this, and I might add...  If I don't sharpen, then Alamy normally accepts the files.

If I need to sharpen a little, I normally use USM - figures 10-5-0

/Flemming

Just to give an alternative view ...

I do it in 10% steps until I get the next size over 48MB. I've set it up as an action on one of the F keys, so I just have to keep pressing that key.

I don't know if it makes any difference. I heard somewhere that upsizing in 10% steps gives a better result, but that may just be a superstition.

Anyway, it's dead easy just pressing the key and watching the figure at the bottom left.

i am superstitious too, 
seriously, i read the same thing, about 10% steps of upsizing . when i was using my 7MP camera, and first joined Alamy, that was how i upsized.  i never got a rejection.
then again, i never submitted anything that did not look good enough to be upsized .

now i have my 14MP pentax, it's much easier. not much to upsize.

Has anyone tried enlarging via export in Lightroom? I'm curious if it would work that well?

Yes, LR works no problem. I have tried both Photoshop and Lightroom to upsize and all have been accepted by Alamy. If I don't need to do any 'extra' work then I find it quicker to do the output straight from Lightroom in fact, so this has become my preferred option.