Talk:Nokia 808 PureView

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Untitled[edit]

This article sounds to me like marketing blabla or just a repetition of PR stuff. No real explanation of the oversampling technique or algorithms used. And Panasonic already used a multi-aspect sensor for years, no need to glorify it in this entry. — Preceding unsigned comment added by 77.25.128.33 (talk) 22:36, 23 April 2012 (UTC)[reply]

First version + sample images search done[edit]

Yeah. Tagremover (talk) 08:18, 7 March 2012 (UTC)[reply]

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Other details[edit]

No mention has been made of the stereo audio capable of recording distortion free up to 140DB? This article focusses on the image capture abilities only. The Audio is an important part to video and should be mentioned in the video section. Also is this an article purely on the camera or about the phone itself? The title is the phone model yet the article purely focusses on the camera and not the other details about the phone. — Preceding unsigned comment added by 203.122.250.23 (talk) 04:29, 24 April 2012 (UTC)[reply]

So add to the article then instead of just complaining!!!! Vexorg (talk) 03:24, 26 April 2012 (UTC)[reply]

Sorry - Wikipedia newbie and terrible at English :) I might give it a crack. — Preceding unsigned comment added by 203.122.250.23 (talk) 05:09, 27 April 2012 (UTC)[reply]

Not a 1-group lens ![edit]

I think you mean no relative movements among the elements. That's just a simple 'prime' (not zoom : fixed-focal-length) lens - (NB In some primes, the front element doesn't move while focussing eg 'Internal Focussing' in Nikon terms). In terms of '5 elements in 3 groups', usually groups are defined by air-spaces between them. Elements within a group are cemented together. (I don't think we need consider liquid-filled gaps or Gradient-index_optics here - they're extremely rare).

Best link I've seen for the PureView Lens is PureView The Tech Behind Nokia’s Salvation - SlashGear. Looks like 5 elements, 5 groups and the text says "a complex five-lens assembly with a range of aspheric surfaces".

Please correct this here, and in Tessar#Vario-Tessar. NB They are calling it 'Tessar', but I doubt if even the marketing departments would call a fixed lens 'Vario-Tessar' - zoom is purely a software function - digital zoom !

--195.137.93.171 (talk) 05:06, 24 June 2012 (UTC)[reply]

shiftable fixed-focus lens ?[edit]

This seems self-contradictory - focussing is the primary movement of a lens. Sharpness to HD standards requires focussing. Shift has a specific meaning, and I doubt if Nokia are into Perspective control. If they were, I'm sure shift would be implemented in software, with an offset in the sensor region , similar to the way zoom is done by scaling a sensor region. It's a great idea for a hack or firmware upgrade, though - I should maybe patent it, but this would count as public disclosure !

I suppose you mean non-zoom; fixed-focal-length, with auto-focus and perhaps with optical Image stabilization ?

--195.137.93.171 (talk) 05:57, 24 June 2012 (UTC)[reply]


Answers:
  1. Vario-Tessar: Just names/brands: Vario- sometimes called, especially in early refs, its now mainly called Tessar, which is better: Changed.
  2. 1-group lens: You are wrong:
    1. Name by Nokia, see refs
    2. Cemented: Term exactly fits to (old) metal mounted elements: Plastics are mostly molded, especially small lenses as in compact cams/phones: ZEISS: "Lenses used in mobile phones are made from plastic and pressed in a mold."[1] Refreshed deleted content.
    3. A lens-group is:
      1. a close, mechanical stable, fixed alignment of elements
      2. often, but not needed, seen by the designer and/or working together as an optical unit.
    Fits all
  3. Shiftable fixed-focus lens: Contradictory statements 1-group <-> autofocus: See unit focusing lens. And: Explains the construction better.
Tagremover (talk) 05:46, 5 September 2012 (UTC)[reply]

Oversampling HD video?[edit]

I.e downscaling 41mpx to 1080p extremely highly unlikely. would require a huge processor. — Preceding unsigned comment added by 94.194.55.120 (talk) 18:05, 7 November 2012 (UTC)[reply]

In fact, the 34 MP (16:9 aspect ratio) are downsampled to 1920 by 1080 pixels up to 30 times per second. Yes, the co-processor does exactly that. --87.123.5.141 (talk) 22:34, 22 November 2012 (UTC)[reply]

*Was* largest and highest resolution - what's changed after?[edit]

The 808's sensor was the largest <...> and highest resolution sensor in a cameraphone at the time of its launch

What is changed, why it 'was', and not now the same record-holder?

What model holds the record thereafter?

Thanks! 37.157.216.45 (talk) 01:10, 17 May 2013 (UTC)[reply]

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Checked. Indrek (talk) 15:30, 14 January 2018 (UTC)[reply]

Suggesting to remove useless Honor link[edit]

And add links to important Sharp Aquos R7 and Sony Xperia Pro-I. Your opinion on that? Spacedrone808 (talk) 11:47, 9 March 2023 (UTC)[reply]

What is the significance of those devices? Indrek (talk) 13:46, 9 March 2023 (UTC)[reply]
They provide better resolution and match Nokia more closely than mentioned honor. Spacedrone808 (talk) 20:46, 9 March 2023 (UTC)[reply]
The reason for mentioning the Honor View 20 is that it was the first phone with a higher-resolution sensor than the 808. This is significant because it shows for how long the 808 remained the sensor resolution champion. Same with the Lumix CM1 and sensor size.
I don't think adding links to the Aquos R7 and Xperia Pro-I would add anything of value to the article, though. Just because they have sort-of-similar specs (though the Sony seems to have 12 MP sensors) doesn't mean they merit inclusion. Indrek (talk) 14:19, 11 March 2023 (UTC)[reply]
808 is still resolution champion if we compare images pixel wise. Bigger MP numbers don't mean anything. Plus all Quad-bayer sensors tend to soften picture and awful noise reduction algorithms make things even worse. Spacedrone808 (talk) 06:50, 12 March 2023 (UTC)[reply]
That may be true, but in that case there seems to be even less reason to mention the phones you suggested. The Honor View 20 at least has the distinction of being the first to surpass the 808 on megapixel count. Indrek (talk) 07:46, 13 March 2023 (UTC)[reply]
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