| 1 | A | B | C | D | E |
| --- | --- | --- | --- | --- | --- |
| 2 | Canon EF 600mm lens - Specifications |  |  |  |  |
| 3 | Attribute | f/4L USM | f/4L IS USM | f/4L IS II USM | f/4L IS III USM |
| 4 | Image | - | - | - | - |
| 5 | Key features | Key features | Key features | Key features | Key features |
| 6 | Full-frame compatible | Yes Yes | Yes Yes | Yes Yes | Yes Yes |
| 7 | Image stabilizer | No No | Yes Yes | Yes Yes | Yes Yes |
| 8 | Environmental sealing | Yes Yes | Yes Yes | Yes Yes | Yes Yes |
| 9 | Ultrasonic Motor | Yes Yes | Yes Yes | Yes Yes | Yes Yes |
| 10 | Stepping Motor | No No | No No | No No | No No |
| 11 | L-series | Yes Yes | Yes Yes | Yes Yes | Yes Yes |
| 12 | Diffractive Optics | No No | No No | No No | No No |
| 13 | Macro | No No | No No | No No | No No |
| 14 | Technical data | Technical data | Technical data | Technical data | Technical data |
| 15 | Focal length | 600 mm | 600 mm | 600 mm | 600 mm |
| 16 | Aperture (max/min) | f/4 / f/32 | f/4 / f/32 | f/4 / f/32 | f/4 / f/32 |
| 17 | Construction | 9 elements / 8 groups | 17 elements / 13 groups | 16 elements / 12 groups | 17 elements / 13 groups |
| 18 | # of diaphragm blades | 8 | 8 | 9 (circular aperture) | 9 (circular aperture) |
| 19 | Closest focusing distance | 6 m (17.95 ft) | 5.5 m (16.45 ft) | 4.5 m (14.8 ft) | 4.2 m (13.78 ft) |
| 20 | Max. magnification | 0.11× | 0.12× | 0.15× | 0.15× |
| 21 | Horizontal viewing angle | 3°30' | 3°30' | 3°30' | 3°30' |
| 22 | Vertical viewing angle | 2°20' | 2°20' | 2°20' | 2°20' |
| 23 | Diagonal viewing angle | 4°10' | 4°10' | 4°10' | 4°10' |
| 24 | Physical data | Physical data | Physical data | Physical data | Physical data |
| 25 | Weight | 6000 g (212.4 oz) | 5360 g (189.8 oz) | 3920 g (138.8 oz) | 3050 g (107.6 oz) |
| 26 | Maximum diameter | 167 mm (6.6") | 168 mm (6.6") | 168 mm (6.6") | 168 mm (6.6") |
| 27 | Length | 456 mm (17.9") | 456 mm (17.9") | 448 mm (17.6") | 448 mm (17.6") |
| 28 | Filter diameter | 48 mm (rear) | Any 52(WII)-series drop-in filter | Any 52(WII)-series drop-in filter | Any 52(WII)-series drop-in filter |
| 29 | Accessories | Accessories | Accessories | Accessories | Accessories |
| 30 | Lens case | ? | 600 | 600B | 600C |
| 31 | Lens hood | ET-161 | ET-160 | ET-160 (WII) | ET-160 (WIII) or ET-160B |
| 32 | Lens cap | E-180II | E-185 | E-185B | E-185C |
| 33 | Retail information | Retail information | Retail information | Retail information | Retail information |
| 34 | Release date | November 1988 | September 1999 | June 2011 | September 2018 |
| 35 | Currently in production? | No No | No No | No No | Yes |
| 36 | MSRP US$ | 923,000 yen | 1,290,000 yen (w/case and hood) | $11,499.00 | $12,999.00 |

Question: When was the  f/4L USM lens released?
Answer: The f/4L USM lens was released in November 1988 (923,000 yen).