Archived posting to the Leica Users Group, 2006/11/01

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Subject: [Leica] M8 & Depth of Field
From: photo.forrest at earthlink.net (Philip Forrest)
Date: Wed Nov 1 12:31:20 2006

We did say that, but the depth of field markings on the lens will still be
valid.  
I just don't like people calling a 35mm lens on an APS sized digital, a 45
or 50mm lens.  Because it's not.  
We don't call our 160mm lenses for our 4x5's 50mm lenses, do we?  The same
with 6x6.  My normal is an 80mm.  It has a very similar field of view as a
50 on 35mm format, but I still call it an 80mm.  
So, we've changed format sizes by going to the less-than-full-frame
digitals.  

-----Original Message-----
From: lug-bounces+photo.forrest=earthlink.net@leica-users.org
[mailto:lug-bounces+photo.forrest=earthlink.net@leica-users.org] On Behalf
Of Walt Johnson
Sent: Wednesday, November 01, 2006 3:22 PM
To: Leica Users Group
Subject: Re: [Leica] M8 & Depth of Field

So in other words a normal lens on a 35 will be a wide angle on a 2 1/4. 
I though that's what we said to begin with? Could I get by saying I'm 
changing my lenses now. I want more coverage so off with the 50 and on 
with the 28. :-D  Philip, I know you are absolutely right in what you're 
saying. In the  real world the 50mm should fake being a 65 on an M8 though?

Philip Forrest wrote:

>The angle of view is different, but everything else about the image is
>exactly the same.  If you use a 47mm large format lens on a 35mm or a 6x6
or
>a 4x5 the results will be exactly the same on the film plane.  The big
>difference between a 6x6 50mm lens and the same focal length for a 35mm
>camera is lens coverage.  All that said, the lens will always have the same
>depth of field regardless of format.  Leica lenses don't know whether they
>are on Leicas or Epsons or Deardorffs or oatmeal boxes.  The lens doesn't
>know & doesn't care.  It does one thing, project an image onto a plane.
The
>best way to discern this difference is to shoot the same focal length lens
>with several different formats, then look at the negatives, not
>enlargements.  OR make prints that keep the difference of format apparent.
>Ie: shoot one scene with three different cameras all with 75mm lenses then
>make prints at a 3x enlargement for all of them.  Then cut out the center
of
>the largest prints to match the size of the smallest ones.  They will be
>exactly the same.
>
>-----Original Message-----
>From: lug-bounces+photo.forrest=earthlink.net@leica-users.org
>[mailto:lug-bounces+photo.forrest=earthlink.net@leica-users.org] On Behalf
>Of Walt Johnson
>Sent: Wednesday, November 01, 2006 12:13 PM
>To: Leica Users Group
>Subject: Re: [Leica] M8 & Depth of Field
>
>Put a 55 on a 6x6 and compare it with what you get with a 55 on a 35mm.
>
>Raimo K wrote:
>
>  
>
>>A 50 is a 50 mm - always (nominally). It does not become a 65 or 
>>anything else.
>>All the best!
>>Raimo K
>>Personal photography homepage at:
>>http://www.uusikaupunki.fi/~raikorho
>>
>>
>>----- Original Message ----- From: "Walt Johnson" <walt@waltjohnson.com>
>>To: "Leica Users Group" <lug@leica-users.org>
>>Sent: Wednesday, November 01, 2006 2:47 AM
>>Subject: Re: [Leica] M8 & Depth of Field
>>
>>
>>    
>>
>>>Luis, I'm not sure I can buy into Jim's statement. a 50 on a 35mm is 
>>>close to normal (46 mm is closer) if it becomes a 65 wouldn't that 
>>>change the effective depth of field? Where is that genius Marc when 
>>>we need him?
>>>
>>>Luis Ripoll wrote:
>>>
>>>      
>>>
>>>>Thanks for clarify Jim,
>>>>
>>>>Saludos cordiales,
>>>>Luis
>>>>
>>>>-----Mensaje original-----
>>>>De: lug-bounces+luisripoll=telefonica.net@leica-users.org
>>>>[mailto:lug-bounces+luisripoll=telefonica.net@leica-users.org] En 
>>>>nombre de
>>>>Digiratidoc@aol.com
>>>>Enviado el: mi?rcoles, 01 de noviembre de 2006 0:16
>>>>Para: lug@leica-users.org
>>>>Asunto: Re: [Leica] M8 & Depth of Field
>>>>
>>>>Depth of field would not change. It's still a 50mm lens but the 
>>>>image is cropped.
>>>>Jim
>>>>In a message dated 10/31/2006 4:42:02 P.M. Central Standard Time, 
>>>>luisripoll@telefonica.net writes:
>>>>Hi all,
>>>>
>>>>On the M8 lenses become  1,3x, would this affect the depth of 
>>>>field?, on
>>>>other words, will have a lens  the same depth of field and at the same
>>>>distance, on a M8 or an M?, maybe is  an stupid question, but if a 
>>>>50 is any
>>>>more a 50 on a M8, and it becomes a  65, I think the depth of field 
>>>>will
>>>>proportionally decrease, on this case I  suppose too that actual scales
>>>>based
>>>>on 35mm format will be no more valid for  1,3 format.
>>>>
>>>>Thanks for your comments,
>>>>
>>>>Saludos desde  Barcelona
>>>>Luis
>>>>_______________________________________________
>>>>Leica Users  Group.
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>>>>
>>>>_______________________________________________
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>>>>
>>>>
>>>>
>>>>_______________________________________________
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>>>>
>>>>
>>>>        
>>>>
>>>_______________________________________________
>>>Leica Users Group.
>>>See http://leica-users.org/mailman/listinfo/lug for more information 
>>>      
>>>
>>
>>_______________________________________________
>>Leica Users Group.
>>See http://leica-users.org/mailman/listinfo/lug for more information
>>
>>    
>>
>
>_______________________________________________
>Leica Users Group.
>See http://leica-users.org/mailman/listinfo/lug for more information
>
>
>
>_______________________________________________
>Leica Users Group.
>See http://leica-users.org/mailman/listinfo/lug for more information
>
>  
>

_______________________________________________
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See http://leica-users.org/mailman/listinfo/lug for more information



Replies: Reply from henningw at archiphoto.com (Henning Wulff) ([Leica] M8 & Depth of Field)
Reply from walt at waltjohnson.com (Walt Johnson) ([Leica] M8 & Depth of Field)
In reply to: Message from walt at waltjohnson.com (Walt Johnson) ([Leica] M8 & Depth of Field)