CONTAX CLUB Carl Zeiss 討論區

香港互聯網康泰時攝影會
現在的時間是 週六 23 9月 17 13:42:40

所有顯示的時間為 UTC + 8 小時




發表新文章 回覆主題  [ 8 篇文章 ] 
發表人 內容
 文章主題 : MTF of ZA lenses
文章發表於 : 週二 30 6月 09 17:23:39 
理事
理事

註冊時間: 週六 08 11月 03 07:56:21
文章: 5756
http://www.sony.jp/dslr/lineup/cz_lens.html

就 ZA 鏡強勁的 MTF, 小弟上星期六就向 Carl Zeiss AG 詢問有關事宜, 內容如下:

----------------------------------------------------------------------------------------------------------------

MTF data of ZF/ZK/ZE vs ZA lenses

Dear Sir / Madam,
Hello! I am a user of ZM, ZF, CONTAX and Hasselblad. When I come across the MTF data of Sony ZA lenses, I just found that they are too amazing. For example for the ZA Planar 85/1.4, the MTF value for 10lp/mm and 20lp/mm nearly reach 100% at f/8, for which I had never seen such a high MTF test result to be published by Zeiss before.

Can I know if the ZA lenses are much superior than the ZF lenses based on these MTF test results? Or is that the MTF tests from Sony website for the ZA lenses had been carried out by Sony without the ordinary approach of Carl Zeiss?

Thank you very much!

Yours faithfully,

------------------------------------------------------------------------------------------------------------------

所得的回覆如下:

Reply 1 -

Date: Mon, 29 Jun 2009 12:56:47 +0200
From: "Hoenlinger, Bertram" <hoenlinger@zeiss.de>

Dear Mr. Lau,

Thanks for your request.

The MTF data for all Sony lenses (including the Carl Zeiss ZA lenses) are created and published exclusively by our partner SONY. We do not have had influence on the published MTF charts.
So please contact Sony directly about the measuring methods and further details of their MTF data.



Best Regards

Bertram Hoenlinger

PLEASE NOTE: Carl Zeiss answers all requests in a timely manner and to our best ability at the time of the request. Please understand that all answers are subject to the technical standards at the time of the request.

If you have received this message by mistake, please inform the sender immediately and delete the original. Any further use of this mail is prohibited.
_______




Carl Zeiss AG
Gesch&auml;ftsbereich Photoobjektive / Camera Lens Division
Internationaler Vertrieb / International Sales
Kundensupport / Customer Support

Telefon/Phone: ++49 7364 20 3398
Fax: +49 73 64 20- 40 45
e-mail: hoenlinger@zeiss.de
http: www.zeiss.de/photo

Carl Zeiss AG
Vorsitzender des Aufsichtsrates: Dr. h.c. Eggert Voscherau
Vorstand: Dr. Dieter Kurz (Vorsitzender),
Dr. Hermann Gerlinger, Dr. Michael Kaschke
Sitz der Gesellschaft: Oberkochen, Deutschland
Amtsgericht Ulm, HRB 501 555, USt-IdNr: DE 811 119 940

----------------------------------------------------------------------------------------------------------------

Reply - 2
(From Dr. Hubert Nasse who had published the guide for reading MTF diagrams in Camera Lens News)

Date: Mon, 29 Jun 2009 14:14:05 +0200
From: "Nasse, Hubert" <nasse@zeiss.de>
Dear Mr. Lau,

the curves which are shown in some Sony brochures have been "processed" with some freedom
by the graphics designers of the brochures. They are scientifically not valid, easily to be seen in
some cases where the figures exceed diffraction limits. So they should not at all be compared to
the data which are published by Carl Zeiss.


With best regards

______________
Carl Zeiss AG
Gesch&auml;ftsbereich Photoobjektive / Camera Lens Division
Labor / Laboratory

Dr. Hubert Nasse
Senior Scientist

Telefon/Phone: (+49) 7364 / 20- 2846
Fax : (+49) 7364 / 20- 4045
mailto: nasse@zeiss.de
http://www.zeiss.com/photo

_________________
圖檔
Wah
理事 - Board of Members
www.flickr.com/dicksonlau


最後由 wah 於 週二 30 6月 09 23:19:17 編輯,總共編輯了 3 次。

回頂端
 個人資料  
 
 文章主題 : Re: MTF of ZA lenses
文章發表於 : 週二 30 6月 09 17:42:28 
幹事
幹事

註冊時間: 週五 28 11月 03 23:54:34
文章: 13672
來自: Hong Kong SAR
wah 寫:
the curves which are shown in some Sony brochures have been "processed" with some freedom
by the graphics designers of the brochures.

呢句超正, 即係點畫都得, 終於水落石出, Sony真冇品! :evil:
照咁睇, 其他廠的MTFs的可信性都好低......

_________________
Best Regards,
圖檔
香港互聯網康泰時攝影會幹事


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 30 6月 09 20:06:46 
事務局長
事務局長

註冊時間: 週日 09 11月 03 03:42:29
文章: 12295
haha...excellent respond! I love it! :lol:

_________________
事務局長

Damn, my Calon Segur heart fall in love with Haut Brion


回頂端
 個人資料  
 
 文章主題 : Re: MTF of ZA lenses
文章發表於 : 週二 30 6月 09 23:32:15 
幹事
幹事

註冊時間: 週三 12 11月 03 19:31:39
文章: 26313
來自: Hong Kong
Terry Sham 寫:
wah 寫:
the curves which are shown in some Sony brochures have been "processed" with some freedom
by the graphics designers of the brochures.

呢句超正, 即係點畫都得, 終於水落石出, Sony真冇品! :evil:
照咁睇, 其他廠的MTFs的可信性都好低......


係唔係 Carl Zeiss 都好憎佢地咁,所以借故爆佢地一鑊呢!?  :lol:

_________________
Lo Fan
圖檔
http://www2.lofan.net
http://www.lofan.net


回頂端
 個人資料  
 
 文章主題 : Re: MTF of ZA lenses
文章發表於 : 週二 30 6月 09 23:59:53 
幹事
幹事

註冊時間: 週五 28 11月 03 23:54:34
文章: 13672
來自: Hong Kong SAR
lofan 寫:
係唔係 Carl Zeiss 都好憎佢地咁,所以借故爆佢地一鑊呢!?  :lol:

我都好有呢個感覺.
公司見錢開眼, 技術人員惟有啞忍. :?

_________________
Best Regards,
圖檔
香港互聯網康泰時攝影會幹事


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週三 01 7月 09 13:36:18 
資深討論區會員

註冊時間: 週日 09 11月 03 00:27:03
文章: 2502
Forward this email to Canon/Nikon yet? :lol:

_________________
無玉無求...


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週三 02 11月 11 09:59:03 
幹事
幹事

註冊時間: 週五 28 11月 03 23:54:34
文章: 13672
來自: Hong Kong SAR
被轉載了:

http://blog.xuite.net/gengjaw.sheu/tessar/36879516

_________________
Best Regards,
圖檔
香港互聯網康泰時攝影會幹事


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週四 03 11月 11 15:03:20 
CONTAX CLUB 會員
CONTAX CLUB 會員

註冊時間: 週三 30 6月 04 12:24:17
文章: 1237
:lol: :lol: :lol:


回頂端
 個人資料  
 
顯示文章 :  排序  
發表新文章 回覆主題  [ 8 篇文章 ] 

所有顯示的時間為 UTC + 8 小時


誰在線上

正在瀏覽這個版面的使用者:沒有註冊會員 和 2 位訪客


不能 在這個版面發表主題
不能 在這個版面回覆主題
不能 在這個版面編輯您的文章
不能 在這個版面刪除您的文章

搜尋:
前往 :  
cron
Powered by phpBB® Forum Software © phpBB Group
正體中文語系由 竹貓星球 維護製作