when I drag my images out of Aperture 3 into Photoshop or onto my desktop, it halves the resolution and drops the dpi to 72
That is exactly as it is supposed to be. Dragging from the browser window will export the previews of your photos, not the full versions. The resolution of your dragged images will depend on your settings in Aperture's Preferences in the "Previews" tab.
To export full versions, select the images in the Browser and use the command "File > Export", set to "original size".
I have my export setting set up as you have suggested [I checked that several times!] but it never made any difference to dragging the images. I can export them using the export button and they'll be ok, but when you're doing a lot of editing, it's easier and faster [I find] just to drag it out into photoshop. To me it's strange that it would halve them when essentially, I'm doing the same process?
Anyway, thanks for your help and responce
, but when you're doing a lot of editing, it's easier and faster [I find] just to drag it out into photoshop.
You could set up Aperture to use Photoshop as external Editor:
Just set the external Editor to "Photoshop" in Preferences > Export > External Editor.
Then you just need to right-click the images in Aperture and select "Edit with Photoshop" from teh contextual menu.
And the edited image will be recognized by Aperture as a version of the Image in Aperture.