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Re: [OM] IMG: Learning About the E-1

Subject: Re: [OM] IMG: Learning About the E-1
From: "C.H.Ling" <ch_photo@xxxxxxxxxxxxx>
Date: Tue, 24 Nov 2009 11:29:32 +0800
I was talking about the stage illumination, the E-520 shot may be half a 
stop brighter (on the two center dancer) but the exposure of E-520 shot is 
2/3 stop more so the stage illumination could be the same. I also expected 
the Disney performance is very professional with minimal difference and it 
seems confirmed.

When talking about the shots themselves, the E-520 is half a stop brighter 
so the total advantage of E-520 shot is 2.5 stops. This is the general 
expectation for the difference between a good Canyon and a E-thing's sensor 
performance. Now, the E-520 shot has MUCH better shadow performance under 
this difference, that's the problem.

C.H.Ling

----- Original Message ----- 
From: "Chuck Norcutt"

> No, I don't agree.  You have two stops difference in ISO and 2-2/3 stops
> difference in shutter speed with the E-520 having a net 2/3 stop
> advantage over the 5DMkII.  The E-520 shot is brighter but I think the
> difference is more than 2/3 stop.  I still think the intensity of the
> lights is changing and the two photos cannot really be compared.
>
> Chuck Norcutt
>
>
> C.H.Ling wrote:
>> Ah! I forgot about that, the shutter speed for 5D II shot was 1/200s F4 
>> (OM
>> 75-150mm) and E-520 was 1/30s F4. I have updated the E-520 file with EXIF
>> info. just now.
>>
>> You reminded me about that, based on the exposure data it seems that both
>> shots were illuminated with similar amount of light so that is not a good
>> sign.
>>
>> I have to find out the shadow color reproduction capability of 5D II in a
>> better controlled way.
>>
>> C.H.Ling
>>
>> ----- Original Message ----- 
>> From: "Chuck Norcutt"
>>
>>> You did not mention shutter speed.  Assuming they are the same then the
>>> 5DII image should be two stops brighter than the E520 image but it is
>>> not... it's dimmer.  The only explanation is that the lights in the E520
>>> image are brighter.  I think that also goes for the "stars" and
>>> "candles".  I think they're brighter too and that's why it's possible to
>>> see "blue sky" on the right.  Yes, I see it too.
>>>
>>> Chuck Norcutt
>>>
>>>
>>> C.H.Ling wrote:
>>>> Chuck, I hope you are right with the stage lights. For the ISO, didn't 
>>>> we
>>>> expect the 5D II shall do at least two stops better than a E-thing?
>>>> Actually, I have another ISO2000 shot without boost in post, same
>>>> background
>>>> darkness and tone.
>>>>
>>>> For Ken's comment, I didn't refer to the color difference, I didn't
>>>> expect
>>>> good natural skin tone under such complex lighting. What I concern is 
>>>> the
>>>> tone and totally missing of shadow details in the 5D II shot. For the
>>>> E-520
>>>> shot, I see dark blue "sky" in the background at the right side, some
>>>> dark
>>>> monitors may not see it but the blue values of 30-40 shall be visible
>>>> with a
>>>> reasonable good monitor.
>>>>
>>>> C.H.Ling
>>>>
>>>>
>>>> ----- Original Message ----- 
>>>> From: "Chuck Norcutt"
>>>>
>>>>> I think the E-520 image shows much more white spotlight which also
>>>>> extends into the background.  Note the white drape.  Given the two 
>>>>> stops
>>>>> difference in ISO and, despite that, the brighter E-520 image the
>>>>> spotlighting had to be much more brilliant when the 520 image was 
>>>>> shot.
>>>>>
>>>>> You can send me your 5DII.  I'll even pay the shipping!  :-)
>>>>>
>>>>> Chuck Norcutt
>>>>>
>>>>>
>>>>> C.H.Ling wrote:
>>>>>> Ken, you are really bad, if our Disneyland had not changed the 
>>>>>> lighting
>>>>>> setup I have to buy another E-thing now and throw away the 5D II. The
>>>>>> two
>>>>>> shots were made at different date, both straightly output from RAW:
>>>>>>
>>>>>> E-520 ISO 800, no NR.
>>>>>>
>>>>>> http://www.accura.com.hk/temp/PC190478_M2.jpg
>>>>>>
>>>>>> 5D II ISO 2000, develop +0.67 stop (ISO3200 equ), no NR.
>>>>>>
>>>>>> http://www.accura.com.hk/temp/IMG_6716.JPG
>>>>>>
>>>>>> C.H.Ling
>>>>>>
>>>>>>
>>>>>> ----- Original Message ----- 
>>>>>> From: "Ken Norton"
>>>>>>> The E-1's biggest issue is chroma noise. The luma noise is actually
>>>>>>> quite
>>>>>>> pleasant, the but the chroma noise reminds me of elcheepo ISO 400
>>>>>>> print
>>>>>>> film
>>>>>>> processed in an uncalibrated minilab. Fortunately, chroma noise is
>>>>>>> easily
>>>>>>> whacked and when doing so it does not do ANY softening.
>>>>>>>
>>>>>>> I suppose that I'm not too worried about the E-1 at ISO 800. I've
>>>>>>> developed
>>>>>>> a few tricks of the trade when shooting it there and have shot it 
>>>>>>> very
>>>>>>> extensively indoors for both recreational shooting and professional
>>>>>>> shooting.
>>>>>>>
>>>>>>> It isn't stupid-clean like the Nikon D3, but unlike most digital
>>>>>>> cameras
>>>>>>> it
>>>>>>> doesn't lose tonal separation at higher ISOs. The noise floor
>>>>>>> increases,
>>>>>>> but
>>>>>>> the assignment of tones to the proper zones is maintained. The 
>>>>>>> common
>>>>>>> fault
>>>>>>> with digital cameras at higher ISOs is that to counter the raising
>>>>>>> noise
>>>>>>> floor, the camera reduces the effective dynamic range of the picture
>>>>>>> to
>>>>>>> keep
>>>>>>> the noise below the threshold. The problem with this is that the
>>>>>>> remaining
>>>>>>> dynamic range is squeezed into a reduced scale. It passes DPReview's
>>>>>>> tests
>>>>>>> with flying colors (or non-colors in this case), but then the 
>>>>>>> grousing
>>>>>>> is
>>>>>>> that the high ISO images are "flat".
>>>>>>>
>>>>>>> No free lunches either way.
>>>>>>>
>>>>>>> AG
>>>>> -- 
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>>>>>
>>> -- 
>>> _________________________________________________________________
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>>
> -- 
> _________________________________________________________________
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> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
> Themed Olympus Photo Exhibition: http://www.tope.nl/
> 

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