Use Smart Objects to rotate single TIFF to avoid quality loss?

I am archiving numerous historic photographs by scanning the originals as high-resolution TIFF files. I need to rotate the scanned images slightly in Photoshop for presentation/archiving purposes but I am worried about losing some image quality.
To maintain lossless images, is it necessary to open my TIFF images as "Smart Objects" before rotating them? If so, this increases my file size many-fold on saving. Is there a way to maintain the approximate size of my original TIFF file?
I am working in Photoshop CS4, Windows 7 64-bit. Thanks for your time,
Ilford3200

Any angular transform that isn't in 90 degree steps will cause resampling no matter what method you use. You are looking for something that doesn't exist. A pixel-based SO will resample the same as a native transform. there would only be a difference with vector data due to how vector rasterization works, but that's irrelevant for what you describe.
Mylenium

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