The standard format is .
(e.g., F4 2000001, F4 2500001)
| Production Year | Start Serial (approx.) | End Serial (approx.) | Notable Changes / Introductions | |----------------|------------------------|----------------------|--------------------------------| | 1988 (launch) | 2000001 | 2025000 | First batch (Japan only late ‘88) | | 1989 | 2025001 | 2065000 | International release; minor firmware tweaks | | 1990 | 2065001 | 2105000 | Improved AF motor driver (quieter) | | 1991 | 2105001 | 2155000 | F4s becomes default for press market | | 1992 | 2155001 | 2205000 | Last year without viewfinder data LCD bleed issues | | 1993 | 2205001 | 2255000 | Mid-production run; better prism sealing | | 1994 | 2255001 | 2295000 | F4e option introduced | | 1995 | 2295001 | 2335000 | Final AF logic revision | | 1996 | 2335001 | 2365000 | Low production – F5 coming | | 1997 | 2365001 | 2370000 | Final batch – F5 already on sale | nikon f4 serial numbers and production dates