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Sony NEX FX full frame mirrorless cameras

introduction

  • these are the 1st full frame mirrorless camera systems
  • they use the same E-mount as cropped sensor Sony NEX E-mount camera system but require full frame lenses such as Sony FE E-mount full frame lenses for full frame coverage
    • this E-mount is TOO SMALL for full frame:1)
      • the diameter does not allow for optimum sensor movement for IBIS, not edge image quality with wide angle lenses
      • the short flange distance makes extreme wide angle lenses very difficult to engineer and unlikely that they will perform well on the edges
  • major selling points of the latest Sony full frame mirrorless cameras:
    • best sensors on the market for dynamic range and high ISO performance
    • best video quality - oversampling of full frame instead of line skipping or pixel binning
    • great video codecs and face autofocus tracking
    • the best Eye AF that even works in continuous AF
    • in camera image stabiliser
    • reasonable AF speed when used with Canon EF lenses and a Sigma or Metabones adapter
  • issues with these cameras
    • colour technology and skin tones in particular can be problematic
    • ergonomics and menu system is awkward, front heavy with most pro lenses
    • camera bodies are not fully weathersealed
    • many of the models are not useful for astrophotography due to the “Star-eating” NR algorithms which even affect the RAW files - this seems to be addressed for the Sony a7 III full frame mirrorless camera and later models
    • battery life is extremely poor on the older models
    • Sensor Filter Stack Issues makes it harder to clean sensors
    • Touchscreen has limited functionality
    • Banding with electronic shutter mode and certain lighting
    • High burst mode forces 12bit RAW and not able to shoot in 14 bit RAW
    • Buffer lag prevents use of camera after burst shots
    • No XQD card reader
    • Rack Zoom During Burst: When shooting moving subjects on high frame burst, zooming in causes dropped focus
    • Moiré and Rolling Shutter in videos
    • Overheating during video - this is one of the issues with using full frame sensors for video
    • Compressed RAW format creates posterization effect with green compression blocks between black and white pixels
    • lenses are large (compared with Micro Four Thirds) and very expensive (compared with most other full frame manufacturers)

comparison of current cameras

model release mp IBIS PDAF video price weight main features
Sony a9 Apr 2017 24mp back-illum. “5EV” 693PDAF/425CDAF 4K 30p/1080 120p 100Mbps $US4500 673g 20fps AF-C, tilt touch screen, 3.7mdot EVF
Sony a7r IV Sept 2019 61mp “5.5EV” 567PDAF/425CDAF 4K 30p/1080 120p? $US3500 g perhaps the best landscape/product/portrait/wedding full frame camera in 2019, no AA filter, 10fps, 5.76mdot EVF
Sony a7r III Oct 2017 42mp “5.5EV” 399PDAF/425CDAF 4K 30p/1080 120p $US3200 g perhaps the best landscape full frame camera in 2017, no AA filter, 10fps
Sony a7 III Feb 2018 24mp “5EV” 693PDAF/425CDAF 4K 30p / 100Mbps 1080 120p $US1999 g 10fps; IBIS, PDAF, Eye-AF in C-AF; best wedding camera in 2018
Sony a7r II Jun 2015 42mp “4.5EV” 399pts 4K 30p/1080 60p $US3200 625g perhaps the best landscape full frame camera in 2015, no AA filter
Sony a7s II Sept 2015 12mp “4.5EV” NO 4K out $US2999 446g? mainly for videographers; 4K video and 120fps 100Mbps HD video
Sony a7 II Nov 2014 24mp “4.5EV” 117pts 50Mbps 1080 60p XAVC-S $A1688 600g IBIS, PDAF
Sony a7s April 2014 12mp NO NO 4K out $A2349 446g mainly for videographers; 4K video but only via HDMI out
Sony a7r Oct 2013 36mp NO NO 1080 60p $A1799 465g 36mp, no AA filter
Sony a7 Oct 2013 24mp NO 117pts 1080 60p $A1199 474g 24mp, PDAF

timeline of FX cameras

  • Sony a9II
    • coming 2019
    • rumoured specs: 36mp multi-aspect 16bit sensor 10fps or 14bit 24fps, 8K 12 bit 30p / 8k 10bit 60p / 1080 240p video
  • Sony a7R IV
    • announced July 2019, coming Sept 2019
    • 61mp 15 stop dynamic range; 10fps with C-AF; 567 PDAF covering 74% frame; 5.5EV IBIS;
    • 5.76mdot EVF; upgraded grip and weathersealing;
    • 4K video
    • $US3500
  • Sony a7S III
    • coming 2019
    • rumoured specs: 36mp multi-aspect 16bit sensor 10fps or 14bit 24fps, 8K 12 bit 30p / 8k 10bit 60p / 1080 240p video
  • Sony A7 III:
    • announced Feb 2018
    • 24mp, 5EV IS, 10fps burst, 4K video, many of the features of the a9 (including AF coverage) and a7RIII
    • much improved over the a7II in nearly all aspects
    • $US1999
  • Sony a7RIII:
    • announced Oct 2017
    • same 42mp sensor as a7RII but improved circuitry and processing delivers 1EV more dynamic range at low ISO
    • IBIS improved to “5.5EV”
    • 10fps burst rate
    • better mirror shock handling and better shutter shock handling
    • adds HiRes mode (“Pixel Shift Multi Shooting”) similar to Olympus OM-D cameras but delivering 4 pixel shifted RAW images covering 169mp but outputs to a single 42mp RAW with better colour fidelity and texture reproduction than a single shot (ie. much less moire)
    • double the AF speed with low light capability extended down to -3EV and with 425 CDAF pts in addition to 399 phase detect points which provide improved image coverage of 68% of frame (cf 45% in a7II and 93% in the a9)
    • adds the a9's touchscreen focus point control and multi-selector joystick on the back of the body in place of the button-style directional pad as well as anti-flicker ability, a 2nd card slot, larger grip and the larger a9 NP-FZ100 batteries
    • 4K video plus now can do 120fps 1080HD mode
    • USB-C 3.1 connector
    • $US3199
  • Sony a9
    • see Sony a9 full frame mirrorless camera, announced April 2017
    • 24.2MP Full-Frame Stacked CMOS Sensor
    • ISO range of 100 – 51200, expandable to 50 – 204800
    • Blackout-Free Quad VGA 3.7m-Dot OLED EVF
    • silent electronic shutter to 1/32,000th sec
    • 3.0″ 1.44m-Dot Tilting Touchscreen LCD
      • touch focusing on the rear LCD screen for easily selecting of and shifting focus towards a desired focus point or subject
    • Internal UHD 4K/30p Video Recording
      • uses full pixel readout without pixel binning to collect 6K of information, oversampling it to produce high quality 4K footage
    • full HD 1080 120p at up to 100mbps with AF Tracking
    • 20 fps Shooting with AF/AE Tracking for up to 241 RAW/ 362 JPEG images
    • 693-Point Phase-Detection AF System with 60 AF/AE tracking calculations per second
      • 25% faster performance when compared with α7R II
    • 5EV 5-Axis SteadyShot INSIDE Stabilization
    • Mag. Alloy Body, Dual SD Card Slots (one for UHS-II media), Ethernet port for file transfer
    • all-new Sony battery (model NP-FZ100) giving double the battery life of a7R II
    • $US4500
    • optional: VG-C3EM Vertical Grip; NPA-MQZ1K Multi-Battery Adaptor Kit; GP-X1EM Grip Extension;BC-QZ1 Battery Charger
  • Sony a7S II:
    • 12mp full frame videography oriented mirrorless
    • adds:
      • now has 164 AF points
      • can now record 4K footage internally with full pixel read-out
      • Full HD 120 fps video recording
      • 4/5x slow motion recording internally
      • new S-Gamut3.Cine/S-Log3 and S-Gamut3/S-Log3 profiles
      • a new Gamma Display Assist function and improved Zebra function
      • improved performance of Fast Intelligent AF
      • ISO range of 50 up to 409,600 (100-102,400 native)
      • 5 axis sensor based image stabiliser
    • $US2999 RRP
  • Sony a7R II:
    • the best camera of 2015?
    • 42mp, IBIS, 399pt PDAF, faster AF for Canon EF lenses
    • shutter issues addressed, silent shutter mode, 500K shot shutter rating
    • awesome video capabilities including 4K 30p/24p, uncompressed HDMI out
  • Sony a7II:
  • Sony a7S:
    • announced Apr 2014
    • newly developed, 12.2 mp 35mm full frame Exmor® CMOS sensor paired with powerful BIONZ X image processor
    • ISO 50 – 4096002
    • 1st full frame camera with full pixel read out in movie mode (ie. no pixel binning) which allows videos with much reduced aliasing, moiré and false color artifacts
    • 4K (QFHD 3840 x 2160 pixels) video using the full width of the sensor, this can be output to a 3rd party external recorder (eg. Atomos Shogun ~$2000) but apparently cannot be saved to a memory card
  • Sony a7R
    • Oct 2013
    • 36mp sensor, no AA filter (apparently a revised version of the sensor in the Nikon D800 dSLR with new micro-lens design)
    • no phase detect AF on sensor
    • $2299 body only
    • optional vertical grip & 2nd battery holder ~$300
  • Sony A7
    • Oct 2013
    • same as A7R including the 25 CDAF points but:
      • 24mp sensor with 117 phase detect AF points on sensor and equipped with AA filter
      • 5fps burst with continuous autofocus
    • $1699 body only, $1999 with kit lens
photo/sonynex_fx.txt · Last modified: 2019/07/17 02:14 by gary1