Sinar APO Sinaron DBM 600mm f/9

Sinar Apo-Sinaron-DB-M 600mm f/9 is the apochromatic dialyte telephoto at 600mm — among the longest LF lenses with apochromatic correction at relatively bright f/9 aperture.

Key features

• Mount: Copal 3 shutter (1s to 1/125, X-sync at all speeds)
• Focal length: 600mm
• Maximum aperture: f/9 (bright for the focal length)
• Image circle: ~600mm at infinity — covers 8×10 + 11×14 with movements
• Optical formula: Apochromatic dialyte (Rodenstock Apo-Ronar lineage, "DB-M" specialty designation)
• Multi-coating standard

Use case + rendering

The 600 DB-M is the rare extreme-tele Sinar — for distant landscape and architectural isolation on 8×10 + 11×14. The f/9 aperture brighter than competing 600mm lenses makes ground-glass focus more practical. Used examples scarce; pricing reflects rarity.

Compatible cameras

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

Related lenses

• Schneider Apo-Tele-Xenar HM 800mm f/12 — Schneider extreme-tele
• Nikon Nikkor-T-ED 600mm f/9 — Nikon ED-glass equivalent at same focal length
• Fujinon T 600mm f/12 — Fujinon equivalent