Upgrade Guide
Nikon D3X→Nikon D850
Is it worth upgrading? Spec analysis, key improvements, and our verdict.
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Worthwhile
Clear improvements over the D3X. Whether it justifies the cost depends on which upgrades matter most to your shooting.
What's new in the D850
-
Resolution46MP vs 24MP (+21MP)
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Weather sealingAdded — fully sealed body
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Burst rate9fps (7fps with tilt screen AF) vs 5fps
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Generation9 years newer (2017 vs 2008)
Unchanged or similar
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StabilisationIBIS not present in new body
Suitability by genre
Base scores — computed from verified specs for an enthusiast shooting photo and video. The Upgrade Checker adjusts them for your skill level.
| Genre | D3X | D850 | |
|---|---|---|---|
| Portrait | +0.9 | ||
| Street | +0.9 | ||
| Travel | +1.4 | ||
| Wedding & Events | +1.2 | ||
| Documentary | +2.6 | ||
| Sports & Action | +1.3 | ||
| Landscape | +1.9 | ||
| Wildlife | +1.3 | ||
| Casual | +1.3 | ||
| Food | +1.8 | ||
| Macro | +1.9 | ||
| Architecture | +1.4 | ||
| Astrophotography | +0.5 | ||
| Filmmaking | — |
Full spec comparison
| Spec | D3X | D850 | |
|---|---|---|---|
| Price | £638 used | £2,399 | |
| Released | 2008 | 2017 | ↑ |
| Sensor | 24.5MP full-frame CMOS | 45.7MP full-frame BSI-CMOS | |
| Resolution | 24MP | 46MP | ↑ |
| Video | No video | 4K UHD/30p, 1080p/120p | |
| Autofocus | 51-point phase-detect AF (15 cross-type) with 3D tracking | 153-point AF system (99 cross-type) — Multi-CAM 20K | |
| Stabilisation | No IBIS (lens-based stabilisation only) | None (relies on VR lenses) | |
| Burst Rate | 5fps | 9fps (7fps with tilt screen AF) | ↑ |
| Battery Life | ~4400 shots (CIPA) | ~1840 shots (CIPA) — outstanding | ↓ |
| Weight | 1220g (with battery) | 915g (body only) | ↑ |
| Weather Sealed | Not weather sealed | Yes | ↑ |
| Viewfinder | Optical pentaprism, 100% coverage, 0.7x | Optical pentaprism — 0.75× magnification, 100% coverage | |
| Screen | 3.0" fixed LCD, 921k dots | 3.2" tilting touchscreen, 2.36M dots | |
| Mount | Nikon F | Nikon F mount | |
| Memory Cards | Dual CompactFlash slots | Dual slots — XQD and SD UHS-II |
Compare side-by-side
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Tell us what you shoot and we'll score the D850 against your specific genres — not just specs.
Other upgrades from the D3X
Related buying guides
Camera family history