Archived posting to the Leica Users Group, 2006/09/16

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Subject: [Leica] Trying to understand M8
From: dstella1 at ameritech.net (Dante Stella)
Date: Sat Sep 16 11:43:54 2006
References: <45066CC50009E8DA@ctsmtpout2.frontal.correo> <440b792d0609161114s4b910f6et3382cd081be0e2ba@mail.gmail.com>

Mehrdad, the coding is to tell the DSP how to process the image from  
the sensor.  It is a big deal and something Kodak 14n owners  
understand.  If you have a large chip without the right optimization,  
you will get CA, color shifts and other nasties.  This was a big deal  
on the Kodak, where you had Nikon's 45mm flange distance and all  
retrofocus lenses; it will be a bigger deal with a Leica, where you  
get around 28mm of flange distance and many older non-retrofocus lenses.

On Sep 16, 2006, at 2:14 PM, mehrdad wrote:

> Yes to number one, the lens is still a 28mm lens, it feels like a 28mm
> lens but with cropping that looks like a 35mm lens
>
> it is still unclear if the coding does anything, 99.99 of all M lenses
> will work, i think the coding is like ROM on R lenses. not much use
>
> #3 it is just a little faster than 100, i am not following what you
> are trying to understand
> . also if you shoot raw format, it will give you +/- 1~2 stops
> leverage depending on the lighting conditions.
>
> one thing to note about digital, it is much like shooting slides, the
> exposure needs to be precise  or you Will have burned highlights.
> (this is one area that that digital needs improvements)
>
> On 9/16/06, Luis Ripoll <luisripoll@telefonica.net> wrote:
>> Hi all,
>>
>> I'm sorry but I'm absolutely ignorant about digital, I've read the  
>> report
>> for the M8 and I'm trying to understand three points:
>>
>> 1.- Viewfinder framelines: If you fit the M8 with a 28mm, the  
>> frameline you
>> will see on the M8 would be the 35 mm focal length frameline?
>>
>> 2.- What is the purpose of the 6 bit coded lenses?. If I put an  
>> "ancient"
>> lens on the M8, it should work as well with manual and automatic  
>> mode?
>>
>> 3.- If the ISO range is from 160 to 2500, and I'm used to be with  
>> i.e. 100
>> ASA, this implies that the minimum ASA for digital is 160?. On  
>> this case a
>> lens with a f stop of F4 could be the equivalent about 3,4/2,8 for  
>> a 100
>> ASA.
>>
>> Could someone clarify me these points?
>>
>> Thanks in advance,
>>
>> Saludos desde Barcelona
>> Luis
>>
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>>
>
>
> -- 
>  -------------------------------------
>  regards, mehrdad
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information


Replies: Reply from jsmith342 at cox.net (Jeffery Smith) ([Leica] Trying to understand M8)
Reply from mark at paulsphoto.com (Mark Comon) ([Leica] Trying to understand M8)
Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] Trying to understand M8)
Reply from msadat at gmail.com (mehrdad) ([Leica] Trying to understand M8)
In reply to: Message from luisripoll at telefonica.net (Luis Ripoll) ([Leica] Trying to understand M8)
Message from msadat at gmail.com (mehrdad) ([Leica] Trying to understand M8)