Camera

The iPad 4 features a 5MP rear facing iSight camera and a 1.2MP front facing FaceTime HD camera. The rear camera shoots photos at 2592 x 1936, while the front facing camera shoots photos at 1280 x 960. The aperture and focal length of the rear facing camera haven't changed compared to the 3rd generation iPad.

Rear Facing Camera Comparison
  Sensor Resolution Compressed JPEG Size Aperture Focal Length
Apple iPad 4 5MP 2592 x 1936 3.4MB f/2.4 4.3mm
Apple iPad 3 5MP 2592 x 1936 3.1MB f/2.4 4.3mm
Apple iPad 2,4 0.7MP 960 x 720 344KB f/2.4 2.0mm
Apple iPad mini 5MP 2592 x 1936 3.1MB f/2.4 3.3mm
Apple iPhone 5 8MP 3264 x 2448 3.1MB f/2.4 4.1mm
Apple iPod Touch 5 5MP 2592 x 1936 3.1MB f/2.4 3.3mm

Still image quality out of the rear camera is comparable to the 3rd generation iPad, and clearly better than the iPad mini.


 

The front facing camera sees the biggest improvement over the iPad 3. The difference is like night and day thanks to the increase in sensor quality and resolution.


 

Front Facing Camera Comparison
  Sensor Resolution Compressed JPEG Size Aperture Focal Length
Apple iPad 4 1.2MP 1280 x 960 426KB f/2.4 2.2mm
Apple iPad 3 0.3MP 640 x 480 117KB f/2.4 1.8mm
Apple iPad 2,4 0.3MP 640 x 480 105KB f/2.4 1.8mm
Apple iPad mini 1.2MP 1280 x 960 372KB f/2.4 2.2mm
Apple iPhone 5 1.2MP 1280 x 960 400KB f/2.4 2.2mm
Apple iPod Touch 5 1.2MP 1280 x 960 406KB f/2.4 2.2mm

Video

The iPad 4 shoots 1080p video from its rear camera and 720p on the front. Video shot with the rear camera is encoded using H.264 (High Profile) at an average bitrate north of 17Mbps. This puts the encode parameters similar to those of the iPhone 5 and iPad mini. The same is true for the front facing camera.


The front facing camera shoots baseline video at roughly 10.5Mbps:


Video quality is pretty good as well:

WiFi Performance

Like the iPad mini and iPhone 5, the iPad 4 uses Broadcom's BCM4334 WiFi controller. The 4334 supports dual-band 802.11n as well as fallback to 802.11b/g. On 5GHz Apple continues to support 40MHz channels for a maximum PHY rate of 150Mbps. Performance and reception both remain solid:

WiFi Performance - iPerf

PowerVR SGX 554MP4 and iPad Retina Display: A Balanced Platform Charging, Battery Life & Thermals
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  • s44 - Thursday, December 06, 2012 - link

    First pixel density is everything, now color calibration... Coincidentally when Apple starts promoting their selling point. Reply
  • zanon - Thursday, December 06, 2012 - link

    None of this is new stuff kid. Pixel density has been something that a lot of us have wanted for a long time, it just somehow never was a priority for anyone. I can easily remember being awed by the IBM T220 (a 22" 3840×2400 [WQUXGA] screen) back in 2001. It used multiple dual link DVI, and the launch price was around $18k, dropping to around $8.5k a year or two later. I hoped back then that it would rapidly proliferate and descend at least to the mere "high end" level, rather then "stratospheric", but it was not to be. Similarly, color has also always mattered for a lot of us. I'm sitting in front of an NEC display built with that in mind, but there has been a whole market of higher end displays and calibration hardware since practically the dawn of color.

    Just because it's only now that, at long last, the industry is moving out of its previous equilibrium doesn't mean there's some conspiracy or "moving targets" or whatever other stupid BS you think of. It would have been nice to see this getting pushed harder and wider literally 10 years ago. Better late then never though. Excellent color and density should be the standard, not the exception, and I'm delighted to see everything suddenly leaping forward again. Density came first, as the most obvious, lowest hanging fruit. Color is next, first with tighter filters, hopefully next year with IGZO and quantum dot films. 120 Hz becoming standard everywhere would be nice too. Whoever helps make that happen gets a hearty thanks from me, even if I never buy any of their stuff directly.
    Reply
  • Sabresiberian - Friday, December 07, 2012 - link

    You are so right here! The introduction of the LCD set us back at least a decade, in terms of color quality, refresh rate, and pixel density.

    I'm not a great fan of Apple the company, but some things they do right, and do better than the PC industry. Displays in portable devices is one of those things. I'm not in the market for anyone's tablet, but I am tempted by the Retina Display notebooks.

    PC portable computer manufacturers take notice: even a somewhat anti-Apple person is considering buying Apple over your junk displays. Time for you to step up your game!
    Reply
  • Arbee - Friday, December 07, 2012 - link

    I would kill for a 20" or 25" 4:3 LCD panel with something like 2048x1536 resolution on a good quality IPS panel with decent color fidelity.

    Heck, at this point I'd like to see any new LCD display that's 4:3 other than what's in the iPad. 4:3 is still preferable for a lot of actual work on computers (programming, word processing, spreadsheets, etc) but the industry decided unilaterally we were all just content consumers and we need a screen optimized only for movies.
    Reply
  • tim851 - Saturday, December 08, 2012 - link

    This is the "logic" of the anti 16:x crowd that I don't get.

    So you would kill for a 25" 4:3 panel with 2048x1536 pixels.

    Why?

    You are aware that a 30" 16:10 panel with 2560x1600px is
    1) physically higher by almost an inch
    2) has 64 more vertical pixels

    Why the dislike for an extra 512 horizontal pixels?

    Also, if you are willing to accept a 20" 4:3 screen: a 27" 2560x1440 screen that sells from 300$ on ebay is also physically higher (by more than 1 inch) and only has 94 viewer vertical pixels (6%)...
    Reply
  • londiste - Saturday, December 08, 2012 - link

    who said anything about dislike for horizontal pixels? it is dislike for lack of vertical pixels.

    anandtech site we're on fits just fine into half of my 1920 horizontal pixels, but the 120 extra vertical pixels that my 1920x1200 screen has over 1080p are extremely useful.
    Reply
  • tim851 - Saturday, December 08, 2012 - link

    The guy I responded to would "kill" for a display with 2048x1536 pixels.

    I wonder why, when he could have bought a display with 2560x1600 years ago.

    That is MORE VERTICAL PIXELS and MORE PHYSICAL SCREEN HEIGHT.

    Also, Anandtech is a very vertical site, I don't see how 120 extra pixels is helping you much there. Is scrolling 10 screens down instead of 9 really bothering you?

    I use Firefox with the tree-style tab addon which puts the tabs in the sidebar, freeing up vertical space and practically using horizontal space. A lot of applications these days are optimized to use horizontal space.
    Had a 21" 4:3 CRT until three years ago and let me tell you I gladly accepted a 16:9 24" LCD.

    I for one prefer using two 'shallow' windows side-by-side instead of once very deep window.
    Reply
  • Olaf van der Spek - Saturday, December 08, 2012 - link

    1600p being 5x as expensive as 1080p is the real problem.

    Yes, more vertical pixels really matter in some cases. It's a bit like running out of memory and having to use swap, it's much slower.
    Reply
  • Arbee - Monday, December 10, 2012 - link

    I don't dislike the extra horizontal pixels, I just want more vertical pixels to go with it. I am a programmer; it is a *substantial* productivity boost to be able to see an entire function on the screen at once. Seeing more width is comparably of very limited benefit.

    And a $300 27" anything is unlikely to have a good-quality panel in it. I am so done with screens that go purple if you don't keep your head perfectly still (that on a $1800 Toshiba laptop) or have a weird tint to them that you can't get rid of.
    Reply
  • xyzzy1 - Wednesday, December 12, 2012 - link

    Much like Digital/CD set back musical reproduction. Digital is still trying exceed what top end analugue playback achieved! Off topic but couold not resist.... Reply

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