Splits in F2 shutter curtains
		The F2 can work properly even when all the light seals (foams) are missing. The only source of light leak on the F2 is the shutter curtains. Although the shutter curtains in the Nikon F2 are made of very tough titanium foil, they do have a limited life. At the end of their life, the shutter curtains split or tear at the weaker points - usually where the end of the foil touches the curtain. The split is usually quite narrow and small, so it can be hard to see. However, the split causes a light leak to the film, and this produces a marked halo or streak effect. Replacement of the curtains is possible, but would require a complete shutter speeds recalibration as well. Hence it is no longer economical to replace the shutter curtains, as it's now cheaper to buy another used body with good shutter curtains.
					A small split in the first shutter curtain, viewed from the front, with the front assembly removed. (Back lit to highlight the split.)
		A small split in the first shutter curtain, viewed from the back. (Back lit to highlight the split.)