=====Nikon Nikkor Ai-S 400mm f/2.8 IF-ED ===== 
{{ :lens:nikkor-ais-400mm-f2.8-if-ed.jpg?direct&400|}}
==== Summary ====
==== Tech Specs ====
| Manufacturer    |Nikon|
| Series          |Nikkor|
| Model           |Ai-S|
| Focal Length    |400mm|
| Max Aperture    |f/2.8 IF-ED|
| Min Aperture    |-|
| Format          |-|
| Image Circle    |-|
| Minimum Focus   |4|
| Focus Rotation  |240|
| Iris Blades     |9|
| Optical Design  |8/6|
| Squeeze         |-|
| Front Diameter  |163|
| Filter Thread   |-|
| Focus/Zoom Rod  |-|
| Native Mount    |F|
| Data Protocol   |-|
| Length          |378.5|
| Weight          |5150|
| Body Telescope  |-|
| Body Material   |-|
| Focus Drive     |-|
| Iris Drive      |-|
| Zoom Drive      |-|
==== History ====
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==== Service ====
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Service Manual: (Insert link to manual here) \\
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Full CLA: **#hrs.**\\
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==== Notes ====
==== Media ====