Archived posting to the Leica Users Group, 2006/11/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 3:31 PM -0500 11/1/06, Philip Forrest wrote:
>We did say that, but the depth of field markings on the lens will still be
>valid.
No they're not, because they assume a print size.
So unless you change your print size as well as
your sensor (film) size, the markings are no
longer valid.
In any case, between the M8 and 35mm film the
difference isn't that large, and if you want to
deal with DOF seriously you have to adjust your
criteria to match your output anyway and then, a
lot of Leica shooting is just about getting the
desired point of focus correct, and above all,
getting the moment of exposure correct so: focus
and shoot, and practice until you're happy with
the results.
>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.
>>>>>See http://leica-users.org/mailman/listinfo/lug for more information
>>>>>
>>>>>_______________________________________________
>>>>>Leica Users Group.
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>>>>>
>>>>>
>>>>>
>>>>>_______________________________________________
>>>>>Leica Users Group.
>>>>>See http://leica-users.org/mailman/listinfo/lug for more information
>>>>>
>>>>>
>>>>>
>>>>>
>>>>_______________________________________________
>>>>Leica Users Group.
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>>>>
>>>>
>>>
>>>_______________________________________________
>>>Leica Users Group.
>>>See http://leica-users.org/mailman/listinfo/lug for more information
>>>
>>>
>>>
>>
>>_______________________________________________
>>Leica Users Group.
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>>
>>
>>
>>_______________________________________________
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>>
>
>_______________________________________________
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>
>
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--
* Henning J. Wulff
/|\ Wulff Photography & Design
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