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독일의 자이스 본사로부터 드디어 연락이 왔다. 언제쩍 문의를 지금에서야 답을 주는 지..
아무래도 크리스마스 시즌이다 뭐다 해서 술쳐먹고 놀다가 이제 보냈나보다.


Information about special features for dealers and users 

The C-SONNAR T* 1.5/50 ZM is a very special lens, based on a classical lens design concept from the 1930´s. This is expressed by the additional letter “C” in the name of the lens.

It helps to achieve pictures with a special artistic touch. This lens draws your subject in a fine, flattering, a little bit glorifying way. It renders a sharpness which is a little bit rounded being less aggressive than in contemporary lens designs, but not soft.

A lot of famous portrait shots of glamorous and prominent people of the 1930´s used this effect. It gives the portrayed person something shining, nearly celestial. This effect is very well balanced,

not exaggerated. Therefore many viewers see it in a subconscious way. The trained observer, however, knows why and enjoys it.  

Provided that the lens is used with f-stops wider than f/2.8 the image character is a bit similar to images which one can get with the soft filter ZEISS SOFTAR ®.

The C-SONNAR T* 1.5/50 ZM, however, avoids some disadvantages of these softeners in the out-of-focus background area.

When one makes a lens with such features, one has to pay for that and has to accept the following side effects:

1. Compared to the PLANAR type of the same focal length the C-SONNAR is less corrected for a flat field.

2. The C-SONNAR T* 1.5/50 ZM has a distinct focus shift when stepped down; this means that the focal plane “wanders” when the distance setting remains unchanged but the lens is stepped down. This focus shift occurs particularly in the near range.

3. The depth of field at high apertures of such a lens is slightly higher than with modern designs. 

Field curvature is not necessarily a disadvantage in shooting 3-dimensional subjects.  

The “wandering” of the focal plane needs special considerations. When the lens is stopped down from wide open to medium apertures, the focal plane in the object space is shifted towards the background.

(For example: from 5 to 6 meters when the lens is stopped down to f/4).

Therefore the rangefinder cannot be adjusted correctly for all f-stops. 

The special features of the C-SONNAR T* 1.5/50 ZM are best used in emotional, artistic, narrative images, portraits or atmospheric landscapes.

For documentation or technical subjects CARL ZEISS recommends to stop down the lens at least to f/5.6 or to use the PLANAR T* 2/50 ZM lens.



근데 이게 뭐냐.. 도대체 어디가 문제인지에 대해서는 언급이 없다.
내가 문제라고 생각한 거에 대해서 원래 그렇다.. 조리개 조이던지 싫으면 다른거 써라..요말인데..
일단 나의 c-sonnar 는 조만간 독일 유학길에 오를 듯 하다.