CONTAX CLUB Carl Zeiss 討論區

香港互聯網康泰時攝影會
現在的時間是 週日 19 11月 17 07:23:20

所有顯示的時間為 UTC + 8 小時




發表新文章 回覆主題  [ 58 篇文章 ]  前往頁數 1234  下一頁
發表人 內容
 文章主題 : C/Y lens on Pentax DSLR
文章發表於 : 週一 04 12月 06 12:02:10 
討論區新手

註冊時間: 週日 13 11月 05 18:24:44
文章: 23
來自: Hong Kong
http://www.dchome.net/viewthread.php?ti ... a=page%3D3

Anyone would like to try?


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週一 04 12月 06 12:41:27 
CONTAX CLUB 會員
CONTAX CLUB 會員

註冊時間: 週六 08 11月 03 01:36:09
文章: 8818
有人肯幫我改,收費合理,我立即出部 ist* DL :lol: :lol:


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週一 04 12月 06 16:35:12 
討論區管理員

註冊時間: 週四 27 11月 03 02:15:48
文章: 3194
來自: Moon Base Alpha
wouldn't it be far more reasonable to convert the lens to PK mount by simply swapping the mount flange ( bayonet bladed side ) instead of the body. After all, C/Y is no more, and converted C/Y lens can then be used on old, current and future Pentax PK mount bodies, film or digital ...

_________________
圖檔 圖檔 圖檔


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週一 04 12月 06 17:05:12 
幹事
幹事

註冊時間: 週三 12 11月 03 19:31:39
文章: 26313
來自: Hong Kong
FR 寫:
wouldn't it be far more reasonable to convert the lens to PK mount by simply swapping the mount flange ( bayonet bladed side ) instead of the body. After all, C/Y is no more, and converted C/Y lens can then be used on old, current and future Pentax PK mount bodies, film or digital ...


Provided that IF AND ONLY IF Pentax can live long, I agree with you.

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


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 11:03:07 
討論區新手

註冊時間: 週六 02 9月 06 12:01:12
文章: 28
Wanna share my little experience over converting the C/Y lens / Pentax body mount. My initial attempt to adapt the C/Y lenses to the Pentax body was, as FR said, by converting the lens mount. By increasing 0.4-0.5 mm of the distance between the blade and the bottom of lens body, C/Y lens can be put on Pentax body. But the drawback is that this method is only suitable for lenses of shorter focal length as the blade for the lenses of longer focal length (e.g. 135/2) is molded in one single piece with the rear part of the lens, which renders the above method not applicable. Also, even for the lenses which can be converted by the above method, the metal pins protruding from the rear of them may obstruct the normal functioning of the camera due to the direction of rotation (anti-clockwise) of the lenses into the camera.

Because of the above, I then attempted for converting the body mount instead. Thanks to the design of the K mount, by removing relative little portions of the rear part of the mount, all of my C/Y lenses can be fitted to the Pentax body in clockwise direction, thereby avoiding the abovementioned problem. At the same time, K mount AF lenses can still be used in full function. The camera is therefore in fact more versatile than before the conversion. Also, the aggregate amount of work for converting the body mount is smaller than converting the lenses (to speak the truth I dare not to damage the C/Y lenses). In order to save future effort, I have planned to fit the modified mount to my future Pentax DSLRs :)


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 11:11:06 
幹事
幹事

註冊時間: 週六 31 7月 04 23:59:03
文章: 4850
ryhl 寫:
Wanna share my little experience over converting the C/Y lens / Pentax body mount. My initial attempt to adapt the C/Y lenses to the Pentax body was, as FR said, by converting the lens mount. By increasing 0.4-0.5 mm of the distance between the blade and the bottom of lens body, C/Y lens can be put on Pentax body. But the drawback is that this method is only suitable for lenses of shorter focal length as the blade for the lenses of longer focal length (e.g. 135/2) is molded in one single piece with the rear part of the lens, which renders the above method not applicable. Also, even for the lenses which can be converted by the above method, the metal pins protruding from the rear of them may obstruct the normal functioning of the camera due to the direction of rotation (anti-clockwise) of the lenses into the camera.

Because of the above, I then attempted for converting the body mount instead. Thanks to the design of the K mount, by removing relative little portions of the rear part of the mount, all of my C/Y lenses can be fitted to the Pentax body in clockwise direction, thereby avoiding the abovementioned problem. At the same time, K mount AF lenses can still be used in full function. The camera is therefore in fact more versatile than before the conversion. Also, the aggregate amount of work for converting the body mount is smaller than converting the lenses (to speak the truth I dare not to damage the C/Y lenses). In order to save future effort, I have planned to fit the modified mount to my future Pentax DSLRs :)


Where did you have your camera modified? Or did it by yourself? :shock: :shock:


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 11:23:19 
討論區新手

註冊時間: 週六 02 9月 06 12:01:12
文章: 28
jason.lau 寫:
Where did you have your camera modified? Or did it by yourself? :shock: :shock:


By myself...just by try and error :oops:


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 11:56:47 
討論區會員

註冊時間: 週五 27 1月 06 12:09:10
文章: 492
來自: Singapore
ryhl 寫:
jason.lau 寫:
Where did you have your camera modified? Or did it by yourself? :shock: :shock:


By myself...just by try and error :oops:


I am interested. Care to share how are the modifications to be done? If not too difficult want to do it on my DL.

_________________
Rolleiflex 3003, SL2000F - Rolleiflex SL66E - SONY Alpha 7R1 7R2
Carl Zeiss C/Y T* - QBM HFT - M HFT, ZM T* - ZF T* - Batis T* - Otus T*
http://www.fuwen.net


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 12:23:49 
討論區新手

註冊時間: 週六 02 9月 06 12:01:12
文章: 28
fuwen 寫:
I am interested. Care to share how are the modifications to be done? If not too difficult want to do it on my DL.


Sure. The modifications are quite simple. Although I have not taken any photo during the works, I shall remove the mount and take some pics to illustrate the steps involved tonite :)


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 12:29:50 
CONTAX CLUB 會員
CONTAX CLUB 會員

註冊時間: 週六 08 11月 03 01:36:09
文章: 8818
ryhl .. 幫我整部,得唔得,當然我唔係話免費。 :P :P


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 13:09:23 
討論區會員

註冊時間: 週五 27 1月 06 12:09:10
文章: 492
來自: Singapore
Why is it that when convert lenses need 0.4-0.5mm clearance whereas converting body no need?

_________________
Rolleiflex 3003, SL2000F - Rolleiflex SL66E - SONY Alpha 7R1 7R2
Carl Zeiss C/Y T* - QBM HFT - M HFT, ZM T* - ZF T* - Batis T* - Otus T*
http://www.fuwen.net


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 14:28:12 
討論區新手

註冊時間: 週六 02 9月 06 12:01:12
文章: 28
The 0.4-0.5mm space is to allow for the C/Y lens mount to screw in the K body mount (the space between the blade/rear of lens is larger for Pentax lenses than C/Y). By removing the obstructing parts (around 0.5mm thick) in the body mount and the protruding 限位片(for M42 adaptor's use) in the thin metal for gripping the lens tight to the mount, this also serve the purpose and the screw in direction can be in reverse (thereby preventing obstruction of the functioning of the camera). Really quite difficult to explain in plain text. You would see it when you see the illustrative photos.


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 16:20:51 
討論區會員

註冊時間: 週四 12 8月 04 08:54:31
文章: 315
ryhl 寫:
The 0.4-0.5mm space is to allow for the C/Y lens mount to screw in the K body mount (the space between the blade/rear of lens is larger for Pentax lenses than C/Y). By removing the obstructing parts (around 0.5mm thick) in the body mount and the protruding 限位片(for M42 adaptor's use) in the thin metal for gripping the lens tight to the mount, this also serve the purpose and the screw in direction can be in reverse (thereby preventing obstruction of the functioning of the camera). Really quite difficult to explain in plain text. You would see it when you see the illustrative photos.


ryhl,
Thanks for your sharing and it's exciting. May I know which Pentax model you worked on? I have a Pentax itsDL and think this is the best model for converting due to the price of it. Would you mind teeling us which C/Y lens you have tried on your modified Pentax? Can the lens be locked. Thanks.


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 16:32:50 
討論區會員

註冊時間: 週四 12 8月 04 08:54:31
文章: 315
ryhl, I have found out that you used K100D in the other forum.


回頂端
 個人資料  
 
 文章主題 :
文章發表於 : 週二 05 12月 06 16:37:09 
討論區新手

註冊時間: 週六 02 9月 06 12:01:12
文章: 28
Hi Choyin, mine is K100D (C/Y lenses with SR, so cool :P). I have D25, D35/1.4, P50/1.4, P85, P135 and S180. All of them can be put on the camera. The lenses cannot be locked in the normal way as on the C/Y bodies, but they are in fact tightly fitted to the body once screwed in, especially for those lenses with the mount blades molded into one with the rear part of the lens (e.g. P135, S180 and P100 or MP100 as well). They are very secured with minimal chance of falling out from the body.

I have indeed found a solution to address the lock problem - simply drill a small hole at the rear part of the lens at the same position of the lock of Pentax and this will serve the purpose. However, by doing so means that the lenses must be damaged. Balancing the risk and the damage to the lenses, I dare not to do in this way. But sure this is a convenient solution to the issue :wink:


回頂端
 個人資料  
 
顯示文章 :  排序  
發表新文章 回覆主題  [ 58 篇文章 ]  前往頁數 1234  下一頁

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:Bing [Bot] 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