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TimF
Taking it strictly


Reged: 30/07/2001
Posts: 18930
Loc: Herts/Beds border
Dalsa unveil new 48 megapixel 24x36mm sensor
      #742069 - 19/12/2008 23:23

Do you want chips with that?

--------------------
Tim BSRIPN


If I had all the money I've spent on drink, I'd spend it on drink


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Garfield
Fanboy


Reged: 19/12/2007
Posts: 167
Loc: London
Re: Dalsa unveil new 48 megapixel 24x36mm sensor [Re: TimF]
      #742070 - 19/12/2008 23:30

24x36?

Don't you mean, and I quote, "A 36×48mm2 48M-pixel CCD imager for professional DSC applications"?

Still pretty great anyway!


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TimF
Taking it strictly


Reged: 30/07/2001
Posts: 18930
Loc: Herts/Beds border
Re: Dalsa unveil new 48 megapixel 24x36mm sensor [Re: Garfield]
      #742089 - 20/12/2008 08:33

Memo to self: read more carefully.

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Tim BSRIPN


If I had all the money I've spent on drink, I'd spend it on drink


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beejaybee
Marvin


Reged: 18/07/2007
Posts: 6274
Loc: Really Here In Name Only
Re: Dalsa unveil new 48 megapixel 24x36mm sensor [Re: TimF]
      #742091 - 20/12/2008 09:11

Like current "high resolution" DSLR sensors, this one has a pixel sizel of around 6 microns. i.e. the critical resolution is ~167 lines per millimetre.

How many lenses are that good?

Quite frankly I'd have thought that the the chance that a medium format lens would have that sort of resolution is nil. A larger format is used so that there is less need for enlargement, so the design circle of confusion is larger ... a lens with a resolution of 10 lines/mm is perfectly adequate for making 10x8 contact prints!

Once again, I'm afraid, we have "megapixel madness"....

It's easy to blame the agencies who want "high resolution" images, but there is (or at least should be) a clear distinction between the amount of detail in an image and the image size in raw pixels.


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Mark_Norton



Reged: 29/06/2002
Posts: 1334
Loc: London, UK
Re: Dalsa unveil new 48 megapixel 24x36mm sensor [Re: beejaybee]
      #743234 - 24/12/2008 13:48

I think you'll find the new Leica S lenses blow that theory out of the water...

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Mark


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huwevans
The 'Not Really Here' Dude


Reged: 05/08/2000
Posts: 17149
Loc: Dorset, UK
Re: Dalsa unveil new 48 megapixel 24x36mm sensor [Re: beejaybee]
      #743397 - 24/12/2008 21:29

Quote:

Like current "high resolution" DSLR sensors, this one has a pixel sizel of around 6 microns. i.e. the critical resolution is ~167 lines per millimetre.

How many lenses are that good?




Are you not mixing up lines and line pairs per millimetre here? 80+ line pairs/mm is common enough with medium format lenses, albeit by no means universally achieved. Modern MF/LF lenses do seem to be generally better than those of a few decades ago - achieved resolutions in excess of 100 line pairs/mm are by no means unknown.

Also, modern LF 'digital' lenses, like Schneider's Digitar series, seem (by all accounts) to resolve much more highly than their designed-for-film siblings on a per focal length basis. This is at the expense of coverage circle though, but given that the formats involved are much smaller that is presumably somewhat academic.

--------------------
Huw Evans.



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Ben_Wearden
enthusiast


Reged: 02/01/2009
Posts: 274
Loc: United Kingdom
Re: Dalsa unveil new 48 megapixel 24x36mm sensor [Re: huwevans]
      #770985 - 07/03/2009 23:50

Comparing it to the 247 MP Red Camera that is coming out soon, I guess it's nothing! =]

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Ben Wearden


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