This is a photomicroscopy image of the cross-section of a Lily ovary.  But this is a microscope image with a difference!  This is a 31-frame mosaic taken with the Canon 5D MkII – so the original image is a massive 20,000 x 20,000 pixels in size – that’s a 0.4 Gigapixel image in real money.  My computer struggled with even the simplest Photoshop action with that size of image so I won’t go beyond 6 x 6 frames for any 5D MkII mosaic in future.