Nikon Nikkor T ED 1200mm f/18

Nikon Nikkor-T-ED 1200mm f/18 is the longest ED-glass LF lens — among the most-extreme telephotos in the LF catalog.

Key features

• Mount: Copal 3 shutter (1s to 1/125, X-sync at all speeds)
• Focal length: 1200mm (effective)
• Maximum aperture: f/18 (very slow)
• Image circle: ~480mm at f/22 — covers 8×10 with generous movements; covers 11×14
• Optical formula: ED-glass telephoto
• Multi-coating standard
• Very heavy — substantial bellows draw and rigid front standard required

Use case + rendering

The 1200 T-ED is the niche super-extreme-telephoto for 4×5 + 5×7 + 8×10 — among the longest lenses available for LF photography. Used by serious wildlife and astronomical photographers. The very slow f/18 aperture requires extensive use of focusing aids and bright sun for handheld-grade ground-glass focus. Used examples extremely scarce; pricing reflects rarity.

Compatible cameras

• 8×10 + 11×14 view cameras with extended bellows + heavy-duty rail

Related lenses

• Nikon Nikkor-T-ED 800mm f/12 — wider T-ED sibling
• Schneider Apo-Tele-Xenar HM 800mm f/12 — Schneider extreme-tele