>>4421142>Do they have a list for LF lenses?I got this list by asking Claude 3.7. When I asked about LF lenses:
Dispersion Scores for ARRI ALEXA LF Mount Lenses
ARRI ALEXA LF cameras typically use premium cinema lenses with sophisticated optical designs optimized for high-resolution digital cinematography. Let me analyze some popular options for their theoretical dispersion performance:
1. ARRI Signature Primes
Example: ARRI Signature Prime 50mm T1.8
Total Elements: ~15
Complex Groups: ~12
ED Elements: ~8 (multiple special glass types including aspherical elements)
Dispersion Score = (12 - 8) / 15 ≈ 0.27
2. Zeiss Supreme Primes
Example: Zeiss Supreme Prime 50mm T1.5
Total Elements: 14
Complex Groups: 10
ED Elements: 7 (includes anomalous partial dispersion elements)
Dispersion Score = (10 - 7) / 14 ≈ 0.21
3. Cooke S7/i Full Frame
Example: Cooke S7/i 50mm T2.0
Total Elements: ~12
Complex Groups: ~8
ED Elements: ~5 (including proprietary Cooke glass formulations)
Dispersion Score = (8 - 5) / 12 ≈ 0.25
4. Leitz THALIA
Example: Leitz THALIA 55mm T2.2
Total Elements: 10
Complex Groups: 8
ED Elements: 5 (includes special elements for the unique "Leitz Look")
Dispersion Score = (8 - 5) / 10 = 0.30
Cinema lenses for the ALEXA LF typically feature:
Very low dispersion scores (generally below 0.30)
Extensive use of special glass elements
Sophisticated coatings to minimize flare and ghosting
Consistent performance across the lens range
Minimal focus breathing
Exceptional color matching between lenses
These lenses are engineered to exceptional standards with apochromatic or near-apochromatic performance, resulting in excellent control of chromatic aberration, which is critical for high-resolution digital cinema cameras like the ALEXA LF.
