日期:98年7月2日

地點:自宅

攝影:梁大叔

CANON 50mm F1.8 改金屬接環

我想,地球上應該沒有人像我這麼閒吧~~把一顆好好的鏡頭改裝了。

☆文章內的圖片都做過90%的壓縮以利瀏灠。完整的圖片與高畫質請參考相簿☆

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我想,地球上應該沒有人像我這麼閒吧~~把一顆好好的鏡頭改裝了。

大家都知道CANON 50/1.8是一顆C/P質很優的好鏡頭,但是最讓人詬病的就是它那玩具般的重量、以及容易磨損的塑膠接環(雖然是強度不錯的工程橡膠),手邊有一個以前拆35-70老鏡頭留下來的金屬接環,於是就動動腦筋把這顆高C/P值鏡頭改成金屬接環。

要改裝之前,請先準備以下東西:
1.CANON 50/1.8 鏡頭一枚。(廢話,不然改空氣嗎?)
2.原廠金屬接環一個。(一定要原廠的,這樣電子接點螺絲的位置才會一樣。)
3.鑷子一支。(不然那些細小螺絲是不可能用手指頭夾起來的!)
4.尖嘴鉗一支。(用來剪掉塑膠接環。)
5.係數200號水砂紙一張。(用來修剪下來的痕跡)
6.AB塑鋼土。(黏上金屬接環)
7.瞬間膠。(補強接環與鏡身之間的細縫。)

先看一下鏡頭原本黑黑的塑膠屁屁。
#1

 

用鑷子的尖端把AF/MF開關這一片蓋子撬開(撬開前請先將鏡頭切為AF狀態,並且把鏡頭轉到最短),請放心但小心的撬下去,這只是用雙面膠黏起來而已。然後把圖片裡你看到的唯一螺絲給轉下來,將螺絲鎖著的金屬片也夾起來。
#2

 

把電子接點的兩顆螺絲鬆下來,然後就可以把鏡頭內鏡組拿下來了,可以看見是很簡單的構造!
要小心不要把電子接點的排線給扯斷了!!
#3

 

把塑膠鏡身上的鏡尾擋板拿下來,確認可以裝到金屬接環裡面,然後就可以拿下來。(這個動作是多餘的,不用急著把這片黑色的擋板裝上去!)
#4

 

接著就把塑膠接環的部分給他剪掉吧!!
要小心不要把AF/MF開關的那部分剪壞了,這邊受不了太大的應力!!
#5


剪完後,剩下薄薄的這一層,這層厚度就差不多是金屬接環的厚度。
所以接下來請用係數200號的水砂紙沾上水磨掉這一層,一定要把這層磨光!!磨玩用清水沖洗並完全擦乾。
(附註:在磨的時候請邊轉邊磨,一次大概轉九十度,每次磨五下即可,水砂紙要放在堅固的平面上,盡量把誤差做到最小)
#6

把鏡尾塑膠接環磨平後,可用美工刀稍微修一下毛邊。
接下來把接環放到鏡身上,這時候先把螺絲插入接環上的四個孔(以下的圖片是我先用瞬間膠黏合給大家看螺絲在鏡身裡面的位置)

最重要的來了!接環上有另一個沒有穿透的凹孔,把這個凹孔對準鏡身CANON字樣a的尾端,也就是canon字樣下的鋸齒狀凸起的第七個(跟大家對不起,忘了拍下來)。
#7

接下來,請調好AB塑鋼土,然後沿著接環與鏡身內側補在螺絲的位置(也不要黏到內鏡組用的三個滑軌,不然就…),厚度請不要超過0.1公分,不然鏡頭零件以及電路板會卡到!我可是拆拆裝裝修改了三四次。
等塑鋼土硬化後針對沒有補到土的部分,用瞬間膠補一下,這可以讓接環與鏡身之間的微小隙縫補起來!
#8

等到瞬間膠與塑鋼土都完全乾燥後,裝機試了一下,很好,沒有問題。
接下來就可以把螺絲給轉下來,只要留兩顆在上面就好,因為其他的兩顆會擋道電路板的作動。這兩顆螺絲的位置稍後會補上。
#9

接下來把電子接點鎖回去。
#10

然後再裝上原本塑膠鏡尾上的黑色塑膠擋板,避免灰塵大量進入鏡身。裝擋板的時候會有點緊,請小心施工別把電子接點扯壞。
再把鏡組完全放入鏡身裡面
如果你現在已經做到這裡,恭喜你,這顆鏡頭的改裝工程即將結束。
#11

把之前拆下來的白鐵螺絲以及鐵片鎖回原來位置。
在蓋上AF/MF開關前,請注意鏡身裡有個約為一公分的小溝槽,AF/MF要對準這個小溝槽才能蓋上去,然後蓋子上與鏡身上都貼一小片雙面膠,蓋上蓋子後把雙面膠壓緊,到這裡,整個工程也就殺青啦!!
#12

試拍,最近對焦距離變成大約30公分左右,最遠約可以十公尺合焦,無限遠無法合焦,不知為何,可能是我鏡身磨的不夠多所造成的。一些些的誤差都會對合焦有所影響,不過沒差,反正我用50mm不會退到十公尺以外。
#13

完成圖,密合度99%!!   我愛金屬接環!!

整個工程從我早上十點收到黑貓寄來之後,總施工時間大約三個小時,中間試了其他改裝方式,到最後終於成功了!!

歡迎大家來討論!!
看有沒有更好的改裝方法!!

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