Nikon Z7

Manufacturer: Nikon
Type: camera
Sensor: Full-frame (FX) 35.9 x 23.9mm backside-illuminated (BSI) CMOS, no optical low-pass filter
Resolution: 45.7MP
Year introduced: 2018
Body price at launch: $3,399.95
Key feature: High-resolution full-frame mirrorless; 493 phase-detect AF points; 5-axis in-body stabilization; 4K UHD video with 10-bit N-Log HDMI output

Overview

The Nikon Z7 was Nikon’s high-resolution full-frame mirrorless camera, announced on August 23, 2018, alongside the more versatile Nikon Z6 as the inaugural cameras of the new Z-mount system (^[1]). The Z7 targeted photographers who demanded maximum detail, combining a 45.7-megapixel BSI CMOS sensor (no optical low-pass filter) with 493 on-sensor phase-detect AF points covering approximately 90% of the imaging area both horizontally and vertically (^[2]). It offered 9 fps continuous shooting in 12-bit RAW and a native ISO range of 64-25,600 (expandable to ISO 32-102,400) (^[3]).

At the heart of the Z-mount system was a new, larger-diameter 55mm mount (17% larger than F-mount) with a shallow 16mm flange distance, which Nikon said “unlocks further possibilities of lens design, greatly increasing capabilities in optical performance” (^[4]). The wider mount exposes more of the sensor to the lens, and Nikon designed the system to support lenses as fast as f/0.95, demonstrated by the development of the NIKKOR Z 58mm f/0.95 S Noct (^[5]).

The Z7 shipped from September 27, 2018 at $3,399.95, while the Z6 followed in late November at $1,995.95 (^[6]).

Key Specifications

Sources: (^[7]), (^[8])

Underwater Photography Significance

For underwater photographers, the Z7 represented Nikon’s entry into full-frame mirrorless territory, a market segment increasingly dominated by Sony. The identical body design between Z7 and Z6 was particularly advantageous for housing manufacturers, as a single housing could serve both cameras (^[9]).

Advantages

The Z7’s key benefits for underwater use included:

• In-body stabilization (IBIS): 5-axis vibration reduction equivalent to approximately 5.0 stops, a first for Nikon. This worked with both Z-mount and adapted F-mount lenses — non-VR F-mount lenses received 3-axis stabilization, while VR and Z-mount lenses received 5-axis stabilization (^[10], ^[11]).
• Full-frame 4K UHD video: Recording at 30fps using the full sensor width with no pixel binning, plus Full HD at up to 120fps. 10-bit N-Log output was available via HDMI for professional color grading with 12-stop, 1,300% dynamic range (^[12]).
• F-mount lens compatibility: The FTZ adapter allowed use of existing Nikon fisheye, macro, and wide-angle lenses, protecting shooters’ existing lens investments (^[13]).
• Silent shooting: Electronic shutter eliminated shake and noise caused by shutter release, useful for skittish marine subjects (^[14]).
• Compact form factor: The mirrorless design produced a smaller housing footprint. At BOOT 2019, Nauticam demonstrated that their NA-Z7 housing was “slightly smaller” than their DSLR housings, with the FTZ adapter integrated within the housing body itself (^[15]).
• USB-C charging: The Z7 supported in-camera battery charging via USB-C when using the EN-EL15b battery, convenient for dive boats without many power outlets (^[16]).

Limitations

Early hands-on testing by Adam Hanlon at the Nikon Professional Roadshow 2019 revealed autofocus limitations relevant to underwater use. While AF performed fine with the Nikkor 8-15mm f/3.5-4.5 fisheye, the 105mm f/2.8 VR macro lens was “disappointing” — the camera “hunted a lot” and was “both slower and less accurate” compared to the D500/D850/D5. The Z7 also lacked dynamic-area AF options (D25, D72, D153) and Group Area AF modes available on Nikon DSLRs (^[17]). A reader commented that these AF limitations convinced them “to continue to enjoy my D800 and D500 cameras” (^[18]).

The limited Z-mount native lens lineup was also initially problematic for underwater use. At launch, no Z-mount lenses were particularly suitable for underwater photography, meaning shooters had to rely on the FTZ adapter with F-mount fisheye and macro lenses “for the foreseeable future” (^[19]). Additionally, Tokina formally confirmed that autofocus did not work with either version of their popular 10-17mm f/3.5-4.5 fisheye (AT-X 107) or their 100mm macro on Z cameras via the FTZ adapter — only manual focus was possible (^[20]).

Z-Mount Lens Development for Underwater Use

Native Z-mount lenses relevant to underwater photography emerged gradually:

• NIKKOR Z 14-30mm f/4 S (announced January 2019, $1,299.95): An ultra-wide-angle zoom with a minimum focus distance of 0.28m, which “may work behind a dome port.” It was the world’s first full-frame 14mm lens to support direct filter attachment. Nikon emphasized it was designed to maximize the resolving power of high-pixel-count cameras like the Z7 (^[21]).
• NIKKOR Z 14-24mm f/2.8 S (announced September 2020, $2,399.95): A faster ultra-wide zoom with a minimum focus distance of 0.28m. Nauticam designed the Wide Angle Corrector Port (WACP) II specifically for use with this lens, offering a 140-degree field of view with “sharpness across the whole frame, even at large apertures” (^[22], ^[23]).

Firmware Updates

Firmware 2.20 (December 2019)

Nikon released firmware version 2.20 for both the Z7 and Z6, adding two significant capabilities:

• CFexpress card support: CFexpress cards used the same form factor as XQD, so no physical modification to the card slot was needed. Both card types could be used interchangeably after the update (^[24]).
• ProRes RAW video output: A paid upgrade ($199.95) enabled recording of 12-bit 4K UHD or Full HD RAW video to Atomos Ninja V recorders connected via HDMI. This required an internal upgrade performed at a Nikon Service Center (^[25]).

The ProRes RAW capability was first announced at CES 2019 in January alongside Eye AF and CFexpress support (^[26]). Initially Nikon suggested the RAW output would be a free firmware update, but by August 2019 they clarified it would require “an additional internal upgrade that will need to be performed at a local Nikon service center, which will incur a service charge” (^[27]).

N-Log 3D LUT (August 2019)

Nikon released a free dedicated 3D LUT for the N-Log feature on Z7 and Z6, compatible with the Rec.709 color space. This enabled adjustment of brightness, saturation, and hue in post-production color grading, bringing out the “full dynamic range” of the 10-bit HDMI output (^[28]).

Nikon Z 7II

In October 2020, Nikon announced the Z 7II as a significant upgrade. Key improvements included (^[29]):

• Dual EXPEED 6 processors: Improved processing speed and burst capability
• 10 fps shooting: Up from 9 fps, with 3.3x the buffer capacity of the original Z7 in 12-bit lossless compressed RAW
• Dual memory card slots: One CFexpress (Type B)/XQD slot plus one SD card slot (UHS-II), a major improvement over the single-slot Z7
• Improved low-light AF: Detection down to -3 EV (compared to the Z7’s -2 EV), allowing reliable focus acquisition “in half the light”
• 4K 60p video: A significant upgrade from the Z7’s 4K 30p maximum
• Eye-Detection AF in video: The Z 7II was among the first Nikon cameras to support Eye-Detection AF and Animal-Detection AF during video recording
• Blackmagic RAW support: In addition to ProRes RAW, the optional upgrade added support for Blackmagic RAW when using the Blackmagic Design Video Assist 12G HDR recorder
• USB power delivery: Could draw power from USB source while in use, preserving camera battery

The Z 7II retained the same 45.7MP BSI CMOS sensor and 493 AF points. It was priced at $2,999.95 and shipped in December 2020 (^[30]).

Housing Availability

The Z7 shares an identical body with the Nikon Z6, so all housings are compatible with both cameras. All major housing manufacturers supported the FTZ adapter for F-mount lens compatibility alongside native Z-mount lenses.

Original Z7/Z6 Housings

• Ikelite 200DL (announced October 2018, shipping early November 2018): ABS-PC construction with DL port system. Depth rated to 200 feet (60m). Included vacuum valve and M16 accessory port. Featured super-sensitive curved levers for shutter and AF-ON controls. Supported TTL via optional DL1 DS Link TTL Converter with compatible Ikelite DS strobes. Made in USA (^[31]).

• Nauticam NA-Z7 (shipping November 2018, $3,450): Aluminum construction with N120 port system. Depth rated to 100m. Featured two lens release buttons (one for Z-mount, one for F-mount via FTZ adapter), allowing lens swaps without removing the camera. Vacuum system reset switch located below the tray eliminated the need to open the housing during lens or port changes. Included self-powered manual flash trigger with LED lights in optical bulkheads. Had a lever for switching between EVF and LCD. Weight: 3.02 kg. Dimensions: 360mm x 200mm x 160mm (^[32]). At BOOT 2019, Nauticam demonstrated that existing ports, extensions, and zoom/focus gears transitioned seamlessly from their DSLR housings (^[33]).

• Sea&Sea MDX-Z7 (announced November 2018): Machined corrosion-resistant aluminum alloy. Depth rated to 100m. Compatible with MDX-series ports and gears. Featured dual-gear Focus/Zoom dial (one for F-mount, one for Z-mount lenses). 100g lighter than the MDX-D850. Supported Optical YS Converter for TTL. Included dedicated window for the camera’s upper control panel. Weight: approximately 2,700g. Dimensions: 339 x 169 x 158mm (^[34]).

• Nimar MPZ7 PRO (shipping November 2018, EUR 1,490): Acetal resin and aluminum alloy construction. Depth rated to 100m. Included integrated Synchro flash trigger, dual fiber optic ports, M14 and M16 accessory bulkheads, and moisture alarm. NIM-108 port mount. Weight: 2.3 kg. Dimensions: 350mm x 170mm x 150mm (^[35]).

• Isotta (announced February 2019 at EUDI Show, shipping March 2019, EUR 2,790 inc. VAT): Hand-crafted anodized aluminum in Isotta’s signature red. Depth rated to 100m. Included TTL converter as standard, dual fiber optic connectors, dual O-ring seals on all buttons and removable parts, integrated back visual and acoustic leak detection system, and three M16 holes. 120mm bayonet port connection. Compatible with INON X-2 viewfinders. Weight: 2,100g with handles. Dimensions: 200mm x 117mm x 173mm (^[36]).

• Seacam Silver (shipping July 2019): Silver aluminum housing. Designed for use with or without FTZ adapter. Used Seacam’s existing standard port system. Full details not published at announcement (^[37]).

• Aquatica AZ6/7 (announced August 2019, shipping September 2019, $2,995 with Surveyor vacuum system): CNC machined from aerospace-grade 6061 T6 aluminum with MIL-A-8625 anodized coating and baked-on powder coat paint. T304 stainless steel control shafts and push buttons. Depth rated to 90m (upgradeable to 130m with deep spring kit). Featured ergonomically placed AF-ON lever under right thumb and image zoom buttons near left thumb. Dual lens release for both F and Z mounts. Available with Nikonos, Ikelite, or optical strobe triggering. Weight: 2.88 kg. Dimensions: 364mm x 158mm x 160mm (^[38]).

Z 7II / Z 6II Housings

The Z 7II and Z 6II retained an identical body design, so housings again served both models.

• Sea&Sea MDX-Z7II (shipping March 2021): Updated version compatible with Z7 II, Z6 II, and backward-compatible with original Z7 and Z6 cameras (with included adapter parts). Same MDX-series port system. Machined aluminum, depth rated to 100m. Weight: approximately 2,700g (^[39]).

• Aquatica AZ6/7 II (shipping March 2022, $3,199): Same construction as original AZ6/7. Included choice of strobe connectors and complete Surveyor vacuum system. Depth rated to 90m (upgradeable to 130m). Weight: 2.88 kg. Dimensions: 257mm x 158mm x 160mm (^[40]).

• Hugyfot (announced March 2022): Separate housings for Z6/7 and Z6/7 II. Machined from solid block of AlMgSi1 high-strength aluminum. Uniquely finished with Cerakote ceramic polymer-based thin film coating, available in Graphite Black, Titanium, Blue Titanium, and Pink Champagne. Pressure rated to 100m. Shipped with HugyCheck vacuum system, one M16 port, and two fiber optic ports (^[41]).

• Seacam Silver Z6II/Z7II (shipping March 2022, EUR 4,350): Fully compatible with all four Z models (Z6, Z7, Z6 II, Z7 II) with or without FTZ adapter. Equipped with S6 flash sync sockets, optional HDMI out and vacuum. Depth rated to 80m (deeper on request). Weight: 2,250g (without port, viewfinder, and handles). Dimensions: 260mm x 170mm x 150mm (^[42]).

DIY Housing Conversions

Community member Svilen Spasov documented a successful conversion of a Nauticam NA-Z7 housing to fit the newer Z6/Z7 II cameras using a 3D-printed camera holder/slider. The original Z6/Z7 was 2mm thinner than the newer models, with the extra thickness mostly in the back. The conversion required modifying the housing’s internal limiter rubber pins and replacing the camera holder part. He confirmed all buttons worked and aligned properly (^[43]).

Community Discussion

In community forums, the Z7 was discussed in the context of the broader mirrorless transition. A 2022 survey on “What system are you using?” showed users migrating from Nikon DSLRs (D850, D800) to Nikon mirrorless (Z9, Z7), though some noted the mirrorless housings were not significantly smaller or lighter than DSLR equivalents at the full-frame level (^[44]).

By 2023, discussion had shifted to comparing the Z7/Z7 II’s successor, the Z8, against Sony alternatives (A1, A7R V) for underwater use. The Z7 generation was seen as an important stepping stone in Nikon’s mirrorless journey, but the Z8’s stacked sensor and improved AF tracking represented a more compelling upgrade for underwater photographers (^[45]).

Successor: Nikon Z9 and Z8

The Z7 line was effectively succeeded by the Nikon Z9 (announced October 2021, $5,499.95), which used the same 45.7MP resolution but with a stacked CMOS sensor and new EXPEED 7 processor offering “approximately 10x faster” processing than the Z 7II. The Z9 added 8K video recording and AF processing at 120 cycles per second (^[46]).

Timeline

• 2018-08-23: Nikon announces Z7 and Z6 with new Z-mount system. Z7 priced at $3,399.95, available from September 27 (^[47]).
• 2018-10-29: Ikelite announces 200DL housing for Z7 (^[48]).
• 2018-11-15: Nauticam ships NA-Z7 housing at $3,450 (^[49]).
• 2018-11-16: Sea&Sea announces MDX-Z7 housing (^[50]).
• 2018-11-23: Nimar ships MPZ7 PRO housing at EUR 1,490 (^[51]).
• 2019-01-08: Nikon announces NIKKOR Z 14-30mm f/4 S lens and upcoming firmware with CFexpress, Eye AF, and ProRes RAW support (^[52], ^[53]).
• 2019-01-23: Nauticam demonstrates NA-Z7 housing at BOOT 2019 (^[54]).
• 2019-02-15: Adam Hanlon tests Z7 at Nikon Professional Roadshow; notes AF struggles with 105mm macro lens (^[55]).
• 2019-02-25: Isotta announces housing for Z6/Z7, shipping March at EUR 2,790 (^[56]).
• 2019-07-09: Seacam ships Silver housing for Z6 and Z7 (^[57]).
• 2019-08-01: Aquatica announces AZ6/7 housing at $2,995 (^[58]).
• 2019-08-29: Nikon releases free 3D LUT for N-Log; clarifies ProRes RAW will require paid service center upgrade (^[59]).
• 2019-12-17: Firmware 2.20 released: adds CFexpress card support and ProRes RAW output ($199.95) (^[60]).
• 2020-02-20: Tokina confirms AF does not work with 10-17mm fisheye or 100mm macro on Z cameras via FTZ (^[61]).
• 2020-09-16: Nikon announces NIKKOR Z 14-24mm f/2.8 S lens at $2,399.95 (^[62]).
• 2020-10-14: Nikon announces Z 7II with dual processors, 4K 60p, dual card slots at $2,999.95 (^[63]).
• 2021-03-24: Sea&Sea ships MDX-Z7II housing for Z7 II/Z6 II (^[64]).
• 2022-03-02: Hugyfot announces housings for Z6/7 series with Cerakote finish (^[65]).
• 2022-03-16: Aquatica ships AZ6/7 II housing at $3,199 (^[66]).
• 2022-03-30: Seacam ships Silver housing for Z6 II/Z7 II at EUR 4,350 (^[67]).

References

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