Filament of Osram 2721 light bulb, used for automotive dashboard warning lights, taken with Minolta 12.5 f/2 bellows lens at 10mm extension. Stacked from 59 images. Actual magnification about 12.88x. The bulb was about 5mm in diameter before I broke it open to get a clear view of the filament. This is after applying power and letting the filament burn itself up. I didn't put a lot of effort into trying to clean up artifacts on this stack.