Archived posting to the Leica Users Group, 2007/11/27

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Subject: [Leica] Leica D lens 4/3rds question.
From: phamard at numericable.fr (Philippe Amard)
Date: Tue Nov 27 08:22:35 2007
References: <20071126205623.5FB4E36C@resin09.mta.everyone.net> <C3711369.77D6F%mark@rabinergroup.com> <002e01c830bc$0b27ed10$6401a8c0@asus930> <474BBA90.6080400@numericable.fr> <CAD35702-BF67-4CF5-9267-1B52330CE1F8@cox.net>

Steve, Len, Geoff
HELP!
See my later answer to Len on his experiment.
This crop and dump thing really puzzles me, and interests me much, for I 
have never been able to understand the crop factor issue or principles; 
how could reducing the angle result in  a "larger" image is  the key to 
it I guess.
Phil...x


Steve Barbour wrote:

>
> On Nov 26, 2007, at 11:34 PM, Philippe Amard wrote:
>
>> Agreed Geoff,
>> 4/3s are full frame four-thirds, aren't they, so long as you use the  
>> lenses that go with them.
>> Else, 35mm are also part-frames compared to 6 x 6 (120) or larger  
>> formats.
>> It's semantics ok, but isn't everything a question of point of view?
>
>
> wow, these French are always so damn logical...
>
> really blows my mind.
>
> :-)
>
> and see my separate post svp,
>
>
> could not agree more !
>
> Steve
>
>
>
>>
>>
>> More primes: I agree with this to the full.
>> Have a nice day
>> Phil...x
>>
>>
>> G Hopkinson wrote:
>>
>>> The smallest DSLR body is the Olympus 410 (four thirds) Just like  
>>> its ancestors the OMs, its making people and other manufacturers
>>> sit up and take notice. Its marginally bigger brother, the 510 adds  
>>> image stabilisation, more live view functionality (I think), WB
>>> bracketing and other nice features. That one is only marginally  
>>> larger than the D40X which is sans stabilisation. Four thirds is not
>>> directly comparable to a "half frame" since the new ones are 10MP  
>>> like the APSC designs, even though the sensor area is smaller, of
>>> course. A film half frame had half the resolution of its full frame  
>>> equivalent since they had less "film grains" to aim the light
>>> at! 432 sq mm of emulsion vs  864 sq mm nominally.  I agree most of  
>>> the zooms have a largish form factor, owing partly to the
>>> designs to improve light angles arriving at the sensor. They are  
>>> zooms of course and some have IS built in. Primes, we need more
>>> compact fast primes!
>>> Cheers
>>> Geoff
>>>
>>> -----Original Message-----
>>> Subject: Re: [Leica] Leica D lens 4/3rds question.
>>>
>>> In film terms the camera format is half half frame.
>>> They've got to scale down the camera to to get my attention.
>>> There are nice digital half frames out here (APS-2 or DX) which are  
>>> half the
>>> size of these bloated 4/3's babies.
>>>
>>>
>>>
>>> Mark William Rabiner
>>> markrabiner.com
>>>
>>>
>>>
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>>>
>>>
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>>
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>
>
>
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Replies: Reply from kididdoc at cox.net (Steve Barbour) ([Leica] Leica D lens 4/3rds question.)
In reply to: Message from afirkin at afirkin.com (afirkin@afirkin.com) ([Leica] Leica D lens 4/3rds question.)
Message from mark at rabinergroup.com (Mark Rabiner) ([Leica] Leica D lens 4/3rds question.)
Message from hoppyman at bigpond.net.au (G Hopkinson) ([Leica] Leica D lens 4/3rds question.)
Message from phamard at numericable.fr (Philippe Amard) ([Leica] Leica D lens 4/3rds question.)
Message from kididdoc at cox.net (Steve Barbour) ([Leica] Leica D lens 4/3rds question.)