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Re: [OM] LR vs. Aperture image sizes [was LR5 beta}

Subject: Re: [OM] LR vs. Aperture image sizes [was LR5 beta}
From: "philippe.amard" <philippe.amard@xxxxxx>
Date: Thu, 2 May 2013 15:22:01 +0200
thanks Chuck but not only is the sensor not that of the x10 but your  
message doesn't explain why the photo has to "pop" when the preview is  
displayed :-(

Thanks al the same :-)

Ph


Le 2 mai 13 à 14:50, Chuck Norcutt a écrit :

> From DPReview's review of the Xpro-1
> -----------------------------------------------------
> Sensor        • 23.6mm x 15.6mm (APS-C) X-Trans CMOS sensor
> • 16.3 million *effective* pixels
> • Primary colour filter (RGB color filter array)
> ----------------------
> Image sizes   3:2
>  • 4896 x 3264
>  • 3456 x 2304
>  • 2496 x 1664
> -----------------------------------------------------
>
> Note maximum image size occurs at 3:2 aspect ratio and is 4896 x 3264.
> Emphasis placed on *effective* is mine.
>
> Chuck Norcutt
>
>
> On 5/1/2013 6:35 AM, philippe.amard@xxxxxx wrote:
>> I also notice that loss in LR with the x10 - the previews suddenly  
>> seem to "plop" as a cold slide would in the projector ...
>> I attributed it so far to a sort of hidden lens adjustment.
>> Yet Moose's explanation also makes  much sense to me.
>> What I don't understand is the 0.5 sec delay for the conversion to  
>> take place on screen
>>
>>
>> Amitiés
>> Philippe
>>
>>
>>
>>
>>
>> ========================================
>>
>> Message du : 01/05/2013 00:47
>> De : "Moose " <olymoose@xxxxxxxxx>
>> A : "Olympus Camera Discussion" <olympus@xxxxxxxxxxxxxxxxx>
>> Copie à :
>> Sujet : [OM] LR vs. Aperture image sizes [was LR5 beta}
>>
>>
>>  On 4/29/2013 4:47 AM, SwissPace wrote:
>>> I had a quick look at some of my Xpro-1 raw files ... quite a bit  
>>> of border is missing from the
>>> LR files which I have just discovered from viewing the aperture  
>>> version.
>>
>> Have you checked the image pixel sizes? I imagine you will find  
>> that LR delivers all the camera claims.
>>
>> If I recall correctly, camera specs and most converters ignore a  
>> few pixels along each edge. This is because they cannot
>> be fully converted for accurate color, as some of the other,  
>> surrounding pixels needed for full decoding of the Bayer
>> array are not there.That little set of border pixels are used in  
>> decoding color for those next further in, but not used
>> directly as part of the image.
>>
>> Soooo, they need to include them in the Raw files, for use by  
>> converters, but they are not intended to be in converter
>> output.
>>
>> DCRaw offers the option to produce these extra, edge pixels, so any  
>> GUI converter/editor using it underneath has that
>> option, if desired. It's not really many pixels. On the A650,  
>> 3000x4000 becomes 3024x4032. I used DCRaw some time ago. I
>> couldn't see anything wrong with the color of the extra pixels, but  
>> I only look closely at a very few images.
>>
>> I can see why the camera makers would not include them in their  
>> specs and most converters don't include them in their
>> output. All it takes is one yahoo blogging about false colors at  
>> the edge of the image to cause endless trouble.
>>
>> Assuming this is what you are seeing, I'm not sure why Apple would  
>> include it.
>>
>> Edgy Moose
>>
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