I think I'd try the different lenses on the different cameras. Put the
cameras on a tripod in some rather constant lighting situation (or
situations) and see if you can find a setting that minimizes the
discrepancy between the cameras and lenses. Or maybe you don't even
have to move the lenses between the cameras if it's your intention to
always shoot a particular lens on a particular camera.
In any case 2/3 stop is a fair sized exposure "error" on a digital camera.
Chuck Norcutt
On 11/23/2013 3:30 PM, Tina Manley wrote:
> Oops, sorry! I misread your comment. The metering with the M9 and MM is
> typical Leica metering - almost like a spot meter of the center of the
> frame. With the M240, you can choose spot or center weighted or
> multi-field. I have mine set on center weighted but I believe it measures
> a greater field than the other two. You can also choose Light Metering -
> Classic or Advanced. Mine is set on Classic. Maybe that makes the
> difference? I'm still learning this camera, though
>
> Tina
>
>
> On Sat, Nov 23, 2013 at 8:55 PM, Chuck Norcutt <
> chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>
>> 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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