Now save in the normal way as the highest quality jpeg. This will halve the file size (from 96mb to the magic 48mb). Now click the Image menu again – select mode and select 8 bits In the top width and height windows make the longest edge (depending on if the image is portrait or landscape orientation) around 5000 pixels – you will need to play with this figure to get the right length for your camera – the aim is to get the pixels dimensions figure at the top of the box to 96mb or above – but get as close to 96mb – as the higher you go the more chance there is of the quality deteriorating. Set the resolution to 300 pixels per inch (240 pixels minimum) In that dialog box make sure all three tick boxes are ticked and that ‘Bicubic Smoother’ is selected in the drop down box. Then, when all is done, click the Image menu and select Image Size To do this – Make sure you shoot in RAW (although jpeg, may work – it’s just I always shoot in RAW) and work on the image in Photoshop in 16 bit colour (which you will be automatically if you have opened the RAW file in Photoshop via Lightroom or Canon Camera RAW software), cloning out dust, tweaking the levels etc (For stock libraries, don’t saturate the colours or do any sharpening – they want their customers to be able to do this to their own tastes/needs). ![]() ![]() This means you have to upscale the size of the file yourself before sending it as a jpeg. The file you upload doesn’t have to be 48MB in itself – but has to be able to be converted by their customer to a 48mb TIFF. It is a bit confusing, so here is my method using Photoshop – but if you use Elements or some other software it may help you too. Many people how to get their images prepared for Alamy, especially their request for 48mb images. Posted on Augby dougchinnery - Photography Business, Photography Tips, Software Tips
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