Comments on: EOS 5D Mark II: The ‘Black Dot’ Phenomenon http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/ Stock Photography Thu, 03 Sep 2009 20:57:43 +0000 http://wordpress.com/ hourly 1 By: Mike Louw http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-30 Mike Louw Sat, 10 Jan 2009 01:08:12 +0000 http://glubsch.wordpress.com/?p=168#comment-30 Yes, the 1.0.7 firmware appears to have done the trick, at least as far as I can see with a few quick real-world test shots. A relief indeed for cityscape and astrophotographers at least! Yes, the 1.0.7 firmware appears to have done the trick, at least as far as I can see with a few quick real-world test shots. A relief indeed for cityscape and astrophotographers at least!

]]> By: Terry http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-29 Terry Thu, 08 Jan 2009 09:42:02 +0000 http://glubsch.wordpress.com/?p=168#comment-29 issue solved! The new firmware Update fixed this problem. http://www.andrewyip.com/blog/2009/01/07/firmware-update-fixes-5d-mark-ii-black-dots-problem issue solved! The new firmware Update fixed this problem.

http://www.andrewyip.com/blog/2009/01/07/firmware-update-fixes-5d-mark-ii-black-dots-problem

]]> By: Canon acknowledges, doesn’t fix black dot and band problems on 5D Mark II — RSS z Zabawkami http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-18 Canon acknowledges, doesn’t fix black dot and band problems on 5D Mark II — RSS z Zabawkami Fri, 19 Dec 2008 15:00:08 +0000 http://glubsch.wordpress.com/?p=168#comment-18 [...] [Via Digital Photography Review, image courtesy of Stephan Hörold] [...] [...] [Via Digital Photography Review, image courtesy of Stephan Hörold] [...]

]]> By: Ariel Bravy http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-17 Ariel Bravy Thu, 18 Dec 2008 21:06:26 +0000 http://glubsch.wordpress.com/?p=168#comment-17 It looks like disabling highlight tone priority, lighting optimizer, and noise reduction fixes the black dot problem for now. http://www.fredmiranda.com/forum/topic/715521/0 Must be a software thing give that it doesn't apply in all situations. With that, it sounds like Canon is about to release a firmware update to cover this issue. http://www.robgalbraith.com/bins/content_page.asp?cid=7-9319-9812 It looks like disabling highlight tone priority, lighting optimizer, and noise reduction fixes the black dot problem for now.

http://www.fredmiranda.com/forum/topic/715521/0

Must be a software thing give that it doesn’t apply in all situations. With that, it sounds like Canon is about to release a firmware update to cover this issue.

http://www.robgalbraith.com/bins/content_page.asp?cid=7-9319-9812

]]> By: John Mann http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-16 John Mann Tue, 16 Dec 2008 04:04:02 +0000 http://glubsch.wordpress.com/?p=168#comment-16 Hi. The fact that these black dots get worse with higher ISO indicates to me that it's a problem with saturation of the analog amplifier that sees the charge from the photodiodes first. Higher ISO, is, I think, cranking up the gain of this amplifier. Analog amplifiers, when they saturate, like from dealing with the previous blown out pixels, take a while to recover and will give very wrong outputs until they do. So, I think, the analog amplifier reading out the blown-out pixels saturates at maximum output level, but does not recover before seeing the charge from the adjacent pixels as the the pixels' charges are fed at a fixed rate to the analog amplifier. Hi. The fact that these black dots get worse with higher ISO indicates to me that it’s a problem with saturation of the analog amplifier that sees the charge from the photodiodes first. Higher ISO, is, I think, cranking up the gain of this amplifier. Analog amplifiers, when they saturate, like from dealing with the previous blown out pixels, take a while to recover and will give very wrong outputs until they do. So, I think, the analog amplifier reading out the blown-out pixels saturates at maximum output level, but does not recover before seeing the charge from the adjacent pixels as the the pixels’ charges are fed at a fixed rate to the analog amplifier.

]]> By: Canon will address 5D Mark II’s “Black Dot” Issues soon | Whats New? Tech Reviews http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-15 Canon will address 5D Mark II’s “Black Dot” Issues soon | Whats New? Tech Reviews Sun, 14 Dec 2008 15:50:54 +0000 http://glubsch.wordpress.com/?p=168#comment-15 [...] [photo credit : Stephan Hoerold] [...] [...] [photo credit : Stephan Hoerold] [...]

]]> By: Canon will address 5D Mark II’s “Black Dot” Issues soon - SlashGear http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-14 Canon will address 5D Mark II’s “Black Dot” Issues soon - SlashGear Sat, 13 Dec 2008 03:42:31 +0000 http://glubsch.wordpress.com/?p=168#comment-14 [...] [photo credit : Stephen Hoerold] [...] [...] [photo credit : Stephen Hoerold] [...]

]]> By: Top Posts « WordPress.com http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-13 Top Posts « WordPress.com Fri, 12 Dec 2008 00:31:54 +0000 http://glubsch.wordpress.com/?p=168#comment-13 [...] EOS 5D Mark II: The ‘Black Dot’ Phenomenon My noise behavior photos have stirred quite some interest. I’ve uploaded these photos to my new blog on the day [...] [...] [...] EOS 5D Mark II: The ‘Black Dot’ Phenomenon My noise behavior photos have stirred quite some interest. I’ve uploaded these photos to my new blog on the day [...] [...]

]]> By: Rick http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-11 Rick Mon, 08 Dec 2008 06:29:27 +0000 http://glubsch.wordpress.com/?p=168#comment-11 Hmmm, the bits of flare that these black dots seems to cover at higher ISO settings look a lot like the dreaded "Microlens artifacts" that show up in astrophotos with some high sensitivity Kodak microlensed CCD-based astrocameras. Many astrophotographer will thus not use these microlensed cameras. See for example: http://www.sbig.com/sbwhtmls/KAF3200ME.htm I am not referring to the blooming, the spike from the bottom, but rather the spike at the top, caused by certain types of microlenses. Recall that Canon is employing new microlenses in this 5DM2 CMOS sensor. Hmmm, the bits of flare that these black dots seems to cover at higher ISO settings look a lot like the dreaded “Microlens artifacts” that show up in astrophotos with some high sensitivity Kodak microlensed CCD-based astrocameras. Many astrophotographer will thus not use these microlensed cameras. See for example:
http://www.sbig.com/sbwhtmls/KAF3200ME.htm
I am not referring to the blooming, the spike from the bottom, but rather the spike at the top, caused by certain types of microlenses. Recall that Canon is employing new microlenses in this 5DM2 CMOS sensor.

]]> By: glubsch http://glubsch.wordpress.com/2008/12/07/eos-5d-mark-ii-the-black-dot-phenomenon/#comment-10 glubsch Mon, 08 Dec 2008 04:06:19 +0000 http://glubsch.wordpress.com/?p=168#comment-10 I'll give it a try. Good suggestion. I already sent him an email. I’ll give it a try. Good suggestion. I already sent him an email.

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