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The a7R II has landed! Sony's much-ballyhooed second go at a pro-grade, mirrorless, interchangeable-lens camera has our full attention. Let's see what new tech makes this camera shine:
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42.4 MP Exmor R CMOS back-illuminated sensor
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BIONZ X image processor
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5-axis in-body optical image stabilization
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4K video recording
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Fast hybrid AF system with 399 focus points
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NFC and Wi-Fi connectivity
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The specs alone are enough to give us itchy shutter fingers—but, first things first. It's teardown time.
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The rear of the camera is adorned with an articulating 3 inch LCD. This is a TFT LCD display with 1,228,800 dots. Dots? What are dots? TIL a dot is (usually) a third of a pixel.
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In short, less than an iPhone (326 for the iPhone 6), but certainly high-density. And that's good, considering that no mirror means no optical viewfinding.
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The left side of the camera body houses plenty of I/O options—an HDMI micro connector, 3.5 mm stereo microphone and headphone terminals, and a micro-USB connector.
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With the body cap off, we catch our first glimpse of the world's first full-frame back-illuminated sensor (BIS) and noiseless shutter.
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Despite being a part of the "Alpha" series, the a7R II uses an E-mount system.
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We find the same NP-FW50 7.2 V, 1020 mAh swappable battery pack as the original a7R and the rest of the Sony Alpha lineup—good news for anyone building a fleet of flagship mirrorless cams.
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Sony kindly included not one but two batteries. You can also charge the battery inside the camera (USB adapter included), and even power the camera entirely via USB.
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We turn our attention to the JIS screws securing the bottom plate, mouths watering in anticipation of the smörgåsbord of tech beneath...
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...And find the tripod mount plate.
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It may not be glamorous, but the tripod mount slides out with ease, great news repairability. Tripod-happy owners can rest easy.
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The bottom panel was a bit of a red herring so we investigate the LCD arm for weak spots.
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The rear LCD panel is connected by a thin ribbon cable that disappears into the back of the camera body. We'll probably have to deal with that before we can crack open this camera...
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Luckily, a small door on the back of the display assembly opens the way to a tiny ZIF securing the cable.
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We allow ourselves a brief detour to investigate the display before delving into the camera body.
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Peeling the LCD from the articulating bracket reveals a PCB packed with passives.
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This little circuit board is probably a breakout board for the LCD, allowing for a thinner cable from the camera.
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The capacitors probably reduce noise in the display; they're clearly visible as a little cluster of dark spots in this X-ray image, courtesy of our buds at Creative Electron.
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Display technology is finally close to passing its Turing test: being indistinguishable from the mirror views in high-end cameras. This leap in tech has allowed for the viability of mirrorless cameras like the A7 series.
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Once we extricate the LCD and its delicate flex cable, the parts start flying.
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First up are the eyepiece and viewfinder frame. The eyepiece slides off for easy swaps; the viewfinder frame is held in place with a few screws.
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With some careful hunting, we find a few remaining screws hiding in the battery cavity. We're pretty stoked for a chance to use the telescoping driver handle in our Universal Bit Kit.
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Now that the viewfinder frame and LCD panel have been removed, the rear housing pops right off.
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All of the button's switches are mounted to internal components instead of the frame—so there aren't any delicate cables to worry about.
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After disconnecting a single cable, we tease out that very mounting frame and the rear button assembly attached to it.
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Next off is the multi-format card reader. It comes quietly.
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We're secretly hoping this camera plays Nintendo DS games.
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With the rear housing and button assembly removed, the motherboard shield comes out with very little resistance.
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Getting our first clear view of the motherboard, we set to work disconnecting every ribbon cable created since the dawn of time.
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We hoist the motherboard out for inspection, finding:
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Sony CXD90027GF SoC
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Micron Technology 5FA98 JWB39 eMCP
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SK Hynix H5TC4G63CFR 4 Gb DDR3L SDRAM
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And on the reverse side:
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Sony CXD4236-1GG, likely a newer version of the CXD4236GG image processor
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Fujitsu MB9AF004 32-bit ARM Cortex-M3 processor
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Murata KM5601002
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This is the part where we get a grip, a camera grip that is.
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An access port allows us to remove the final screw securing the front grip to the body.
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Camera brand-fans live and die by their adjustment wheels. The grip features the forward spinner and shutter button, as well as the Wi-Fi antenna.
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We find a trio of boards hiding behind the grip, supporting a couple of chips and what looks like an NFC antenna.
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Perfect for Sony's Playmemories Mobile application, the NFC chip will allow interactions between smartphones the a7R II when Wi-Fi is not an option.
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Back to the viewfinder—turns out we can pull it straight out of its cavity. With its frame previously dispatched, it was only held in place by a gummy thermal pad.
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Why the thermal pad? Might have something to do with the 1.3 cm XGA OLED. With 1024 x 768 pixels in half an inch, that's 2,560 ppi. Wowza.
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The lens assembly even works as a standalone upside-down-maker! Aren't optics cool? That logo sure is.
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Hats off to you Sony! You've got our teardown engineer tired, but not beat. The upper case assembly pops off and steps aside for a glimpse at the goods.
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Eager to get our first look at the new Exmor R CMOS sensor, we extricate the entire sensor assembly from the camera. The rest of the body feels like an empty husk without the hulking sensor and stabilization cradle.
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In today's episode of iFixit Teardown Cinema, we see the sensor-shift stabilization mechanism in action.
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The CMOS sensor rests on a light tray, floating between two hefty plates.
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A quick detour before we proceed to the magnets: we pluck the a7R II's 42.4 MP image sensor from the stabilization system.
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With the CMOS sensor in the wild, we get a clearer view of what's been touted as the world's first back-illuminated 35 mm full-frame sensor.
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The square hole in the sensor's PCB also hints at a tricky assembly process—it's likely a cutout used to accommodate the vacuum nozzle that holds the sensor during assembly, as evidenced by the small patch of scratches at the center of the cutout. A peek with the X-ray reveals the array of solder balls that sandwiches the whole thing together when it's done.
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Is that a Force Touch trackpad? No, it's an exposed view of the a7R II's sensor-shift stabilization hardware. Sony's marketing team named this the 5-axis SteadyShot. Fancy.
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The central tray of the stabilizer holds the image sensor, and is home to three electromagnets, each a component of a voice coil, an electromechanical device used for incredibly fine positioning.
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These coils live in the magnetic fields of their permanent magnet buddies—which means slight variations in power to the three coils generates forces in a variety of directions. Enough variety to adjust the sensor on five distinct axes. Not a small feat for a full-frame camera.
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After removing the battery cavity, not much remains—the noiseless shutter mechanism, a few stray cables, and on the front of the body a spring contact leading to that Wi-Fi antenna we found earlier.
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A7R II Repairability Score: 4 out of 10 (10 is easiest to repair).
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The battery can be easily replaced without tools.
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The tripod mount and viewfinder can be replaced without disassembling the camera body.
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While very difficult, the rear LCD panel can also be removed without disassembling the camera body.
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Accessing anything inside the camera requires removing the complex rear LCD panel first.
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Internal components are very intricately organized; repair without a service manual would be very difficult.
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Lastly, a hearty shout-out to our friends at Creative Electron for their X-ray imaging wizardry. Thanks guys!
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35 Kommentare
Yeah, Wondering also about weather sealing.