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Custom Mode C1: Underwater Macro Settings

Mode: Manual (M)
Aperture: f/10 – f/14 (The “Secret Handshake” Strategy)
- f/10: Peak sharpness for stationary subjects.
- f/14: Optimal compromise for M43; 50% more DOF than f/9 while avoiding the diffraction “mush” of f/20.
Shutter Speed: 1/250s (Sync limit; essential for killing ambient green water)
ISO: 200 (Drop to ISO 80 for pitch-black backgrounds)

AF Mode: S-AF
AF Illuminator: OFF
AF Target: Small point
AF+MF: OFF
- Not using Nauticam O60-F Focus Gear for now
Back Button Focus: ON (Assigned to AF-ON)
Shutter Half-press: AF On
AF Limiter: OFF (Preset: On1)
- Does not work well. Need to play with it
Distance for On1: 0.1m – 0.4m
- Covers subjects from port glass to ~0.5m physical distance.*
AF Scanner: OFF (Prevents lens from “hunting” to infinity if AF misses)
Release Priority S-AF: OFF
- Need to investigate more
Subject Detection: ON/OFF (Cats&Dogs AI)
- the Animal AI on the Mark II has been specifically refined to recognize a broader range of silhouettes that more closely match fish, nudibranchs, and other marine life.
- Set dedicated button ISO

Focus Peaking: OFF (Can be toggled ON for high-contrast night subjects)
MF Assist / Magnify: OFF (Map ‘Magnify’ to a housing button for manual verification)

Trigger: Backscatter OM Smart Trigger
Camera Menu: Flash Fill-In (RC Mode ON)
Strobe: Backscatter Hybrid Flash (HF-1)
Strobe Dial: SC Macro (Smart Control Macro)
Flash Mode: TTL / SC Macro
- Note: Use Flash Comp -0.7 to -1.0 to prevent “blooming” on white nudibranchs or reflective squid skin.
Diffuser: Flat White Diffuser (Expands beam to 140°)
LED Light Mode: Wide
LED Intensity: High (Essential for AF contrast at f/14)