Sharpening (using Photokit Output Sharpener ) for this master file. Do
I need to sharpen a different version for each output size before
printing (i.e., say if I want to print an 8x10, 4x5, etc) at different
resolutions (not resampling the native resolution, but simply changing
the image size in Photoshop)? Since Photokit Output Sharpener wants to
know the final image size, I take it this is necessary, requiring
multiple copies of the image with different output sharpening for
different output sizes.
I'll have a go at this one.
What Jeff actually says [from memory!] is that unless you need to do any sifnificant uprezing [and you really dont need to unless your DPI falls below about 240 DPI based on your image print size] that you are far better off just sending the files native pixels to the printer. This being the case if you have processed your file at say 350 DPI then there is no need to re-size it. Just send the native pixels at 350 DPI to the printer. Thus sharpen with Photokit sharpen at 360 DPI output.
Photokit output sharpen wants to know the final DPI size - not what size the paper you are printing to necessarily is. So sharpen to your images DPI and then send the native pixels to the printer.
Unless you have specific need to change the DPI size of the image there is no need to keep multiple versions. Just keep one master file, which is capture sharpened and creative sharpened. Then simply output sharpen based in the images DPI and send to the printer.
I will often still end up with multiple output sharpened files of the same image that have been tweaked to suit different papers. E.g: I reccently printed a portrait of my son on two very different papers that needed very different tweaks during soft proof. I saved and kept both versions.
The above is my understandinng and has been my workflow.
I havent addressed your second question as I dont print from LR - I print from CS3.