[rollei_list] Re: Hello again, and a lens question

  • From: Frank Dernie <Frank.Dernie@xxxxxxxxxxxxxx>
  • To: rollei_list@xxxxxxxxxxxxx
  • Date: Sat, 12 Dec 2009 07:21:38 +0000

Eric,
I am in agreement with you completely.
Frank

On 12 Dec, 2009, at 02:52, Eric Goldstein wrote:

> Doug -
> 
> I don't think it matters. That's why I said I think the unncoated
> Sonnar 50/1.5 is a great lens with great character... I am generally
> not a technical shooters that looks for very high contrast and minute
> detail... I am much more oriented toward atmosphere and composition
> and interest... I like the look of classic lenses...
> 
> But the lens designers in the 20s and 30's had their work cut out for
> them in trying to make a fast 50 with good contrast... the Sonnar is
> based on the triplet and has numerous complex cemented surfaces to
> minimize the number of air-to-glass interfaces. The f/2 version seems
> to be substantially better corrected, which would make sense as it is
> almost a stop slower...
> 
> 
> Eric Goldstein
> 
> --
> 
> On Fri, Dec 11, 2009 at 9:17 PM, Douglas Nygren <dnygr@xxxxxxxxxx> wrote:
>> Eric,
>> Given that we burn the corners in, does it really matter that the lens isn't
>> sharp in the corners. All this corner sharpness is great hype from the lens
>> companies, but in the darkroom we show them who is boss and burn the
>> corners. I couldn't care less about  the corners. However, your point that
>> wide open the lens isn't sharp strikes a nerve. What's happening where
>> things are important seems more vital than all unneeded concern about the
>> corners.
>> 
>> Doug
>> 
>> 
>> On Dec 11, 2009, at 8:59 PM, Eric Goldstein wrote:
>> 
>>> The uncoated Sonnar 50/1/5 is a great lens with great character, but
>>> it is far from sharp wide open and away from the center.
>>> 
>>> 
>>> Eric Goldstein
>>> 
>>> 
>>> 
>>> On Fri, Dec 11, 2009 at 8:49 PM, CarlosMFreaza <cmfreaza@xxxxxxxxx> wrote:
>>>> 
>>>> 2009/12/11 Stephen Attaway >
>>>> To quote from Ivor Matanle: "The portrait of Mr Robert Cox was taken in
>>>> 1974
>>>>> 
>>>>> to mark his fifty years of service to his company ... with a 50mm f1.5
>>>>> uncoated Zeiss Sonnar, and shows perfectly the curious characteristic of
>>>>> defined yet slightly unsharp detail that makes the optical quality of
>>>>> classic lenses so attractive."
>>>> 
>>>> I tend to disagree with Ivor Matanle, the uncoated Zeiss Sonnar 1.5/50
>>>> was designed to be a very sharp lens, in general lens designers look
>>>> for lenses to produce an image as close to the real image as possible,
>>>> it means aberrations free, sharp and the best  micro-contrast, except
>>>> lenses for special purposes. It's true some old lenses produce
>>>> pleasant images thanks to some no well corrected aberrations (I think
>>>> about portraits specially), but they couldn't be the standard to
>>>> obtain a good image.
>>>> 
>>>> This is a sample about a snapshot "portrait" taken with the uncoated
>>>> Contax II Sonnar 1.5/50 _wide open_ f1.5 and 1/1250 sec shutter speed
>>>> , I think the in focus areas show very good detail for a 71 years old
>>>> uncoated lens despite a scanner not so good for 35mm :
>>>> http://www.flickr.com/photos/itarfoto/3199809044/
>>>> 
>>>> Carlos
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