You need to re-read my post and/or check the EXIF data that is posted
along with your shots. The exposure difference is not due to exposure
compensation but to differences in shutter speed and ISO as I explained
below. The 21mm shot has both greater ISO and longer shutter speed with
the two together amounting to a 2/3 stop increase in exposure over the
35mm shot. The question is: why did it (apparently) meter that way?
Chuck Norcutt
On 11/23/2013 10:43 AM, Tina Manley wrote:
> Hmm. That would be the M9 so I checked and it is set for no exposure
> compensation, just like the other two cameras. I don't know why the EXIF
> would show 2/3 stop increase.
>
> Tina
>
>
> On Sat, Nov 23, 2013 at 2:00 PM, Chuck Norcutt <
> chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>
>> Except that the 2/3 stop increased exposure in the 21mm image (as
>> indicated by the EXIF data) is about what I guessed visually.
>>
>> Chuck Norcutt
>>
>>
>> On 11/23/2013 5:24 AM, Jez Cunningham wrote:
>>> But hitting 'auto' in LR is so extreme that you'd be hard pressed to
>>> make meaningful comparison.
>>>
>>> On 23/11/2013, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>>>> I was mistaken about equivalent exposures on the EXIF data. Now that I
>>>> take another look at it I see that they both have the same aperture but
>>>> the 21mm has a 2/3 stop greater exposure than the 35mm. It's 1/3 stop
>>>> more sensitive on ISO and 1/3 stop greater exposure time on shutter
>>>> speed. I'd have thought the exposure bias would be in the opposite
>>>> direction. I'd expect the wider angle lens to see more sky and give the
>>>> scene less exposure. From the EXIF data:
>>>>
>>>> Focal Length 35 mm 21 mm
>>>> Exposure Time 1/125 sec 1/91 sec
>>>> Aperture f/4.8 f/4.8
>>>> ISO Equivalent 160 200
>>>>
>>>> Chuck Norcutt
>>>>
>>>>
>>>> On 11/22/2013 6:40 PM, Tina Manley wrote:
>>>>> LR didn't do much at all. The 21 mm lens brings in a lot more light
>> than
>>>>> the 35 and the 50 dims it even more. I didn't have any exposure
>>>>> compensation set on any of the three cameras. I think it's just the
>>>>> difference in the amount of light the various lens lengths let in. I
>>>>> normally have all cameras set on center-weighted exposure which would
>>>>> make
>>>>> difference over averaged exposure.
>>>>>
>>>>> Tina
>>>>>
>>>>>
>>>>> On Sat, Nov 23, 2013 at 12:35 AM, Chuck Norcutt <
>>>>> chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>>>>>
>>>>>> Both color images have equivalent exposures recorded in the EXIF data
>>>>>> but the 21mm image is *much brighter* than the 35mm image. What do
>>>>>> these things look like before LR was allowed to play with them?
>>>>>>
>>>>>> Chuck Norcutt
>>>>>>
>>>>>>
>>>>>> On 11/22/2013 3:22 PM, Tina Manley wrote:
>>>>>>> PESO:
>>>>>>>
>>>>>>> I've just now started downloading all of the photos from my trip to
>>>>>>> Italy
>>>>>>> but I thought it would be fun to compare the three cameras that I
>> took.
>>>>>>> Each one had a different lens which will also make a difference!
>>>>>>>
>>>>>>> http://www.pbase.com/tinamanley/image/153485285
>>>>>>>
>>>>>>> http://www.pbase.com/tinamanley/image/153485286
>>>>>>>
>>>>>>> http://www.pbase.com/tinamanley/image/153485287
>>>>>>>
>>>>>>> They were all three processed minimally in LR by just hitting Auto
>> and
>>>>>>> adding a small amount of Clarity and Vibrance. I'm sure I'll work on
>>>>>> them
>>>>>>> some more but I wanted to compare the cameras, not the processing.
>>>>>> Maybe I
>>>>>>> should post a 100% crop from each?
>>>>>>>
>>>>>>> C&C greatly appreciated.
>>>>>>>
>>>>>>> Tina
>>>>>>>
>>>>>> --
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>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
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>>>>
>>>>
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>> _________________________________________________________________
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>>
>>
>>
>
>
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