Can non-interchangeable lens RF cameras capture wide-angle or telephoto shots?
The answer is yes, we can achieve this by using external wide-angle and telephoto lenses.
However, we need to address the issue of the RF camera's viewfinder first. Generally, non-interchangeable lens RF cameras only have a framing frame for one focal length in the viewfinder. Therefore, when we attach a wide-angle lens, the original framing frame becomes too small. Conversely, when attaching a telephoto lens, the framing frame becomes too large. To solve this problem, besides jokingly drawing new framing frames on the original viewfinder (just kidding!), we can use an external viewfinder.
For example, if the lens focal length on the RF camera is 50mm, attaching a 0.7x wide-angle lens is equivalent to 35mm. At this point, we just need to find a 35mm external viewfinder to attach to the flash hot shoe of the RF camera for framing.
不可換鏡頭的RF相機可以拍廣角或遠景嗎?
答案是可以的, 我們可以用外接式的廣角鏡和望遠鏡來達到這個目的.
但是要先解決RF相機觀景窗的問題. 一般不可換鏡頭的RF相機的測距觀景窗都只會有一個焦段的構圖框. 因此, 當我們外接廣角鏡頭後, 原構圖框就變得太小了. 反之, 接上望遠鏡頭, 構圖框就又變得太大. 為解決這個問題, 除了在原測距觀景窗上自己畫上新的構圖框(開玩笑的!), 就是採用外部光景窗.
舉例來說, RF相機上的鏡頭焦距是50mm, 裝上0.7倍的廣角鏡後, 就等於35mm, 這時只要找一個35mm的外接觀景窗裝在RF相機的閃燈熱靴上, 就可以用來構圖了.
The Yashica Electro 35 series RF cameras have designed a set of lens accessories to meet this demand: (1) 0.8X external wide-angle lens, (2) 1.3X external telephoto lens, and (3) an external viewfinder with framing frames for both wide-angle and telephoto shots. The fixed lens focal length on the Yashica Electro 35 is 45mm, so after attaching the external lens, the new focal lengths become 36mm and 58.5mm. While 36mm may be considered wide-angle, 58.5mm should still fall within the range of standard lens focal lengths.
Yashica Exectro 35系列的 RF相機, 因應這項需求就設計了一組鏡頭附件 (1)0.8倍外街廣角鏡頭,
(2)1.3倍外街望遠鏡頭, (3)具有廣角與望遠2個構圖框的外接觀景窗. Yashica Electro 35上的固定鏡頭焦距是45mm, 所以裝上外接鏡頭後, 新的焦距便成為 36mm 和 58.5mm. 36mm或許可稱為廣角, 但58.5mm應該還算在標準鏡頭焦段的範圍內.
Yashica Electro 35GT and Tele/Wide lens set
The Songshan Tobacco Factory has been converted into a cultural and creative park for some time now, and I hadn't had the chance to take some old (building) photos. Taking advantage of a few days off, I went to Taiwan this time to visit, and also to test the Yashica Electro 35 GT and the external wide-angle and telephoto lens set. Below are several sets of photos comparing the perspectives of 36mm, 45mm, and 58.5mm.
The first set of comparison photos is of the maternity ward next to the Xiaoshandang.
松山菸廠改成文創園區有一陣子了, 一直沒有機會去拍些老(建物)照片. 趁著連休幾天出發去台年前走這一遭, 順便測試一下Yashica Exectro 35 GT和外接廣角望遠雙鏡頭組. 以下就是幾組 36mm, 45mm, 58.5mm 視角比較的照片.
第一組比較照片是小山堂旁的育嬰房
f = 45mm x 0.8 = 36mm
f = 45mm
f = 45mm x 1.3 = 58.5mm
The second set of comparison photos is of the skyscrapers in the Xinyi District. The 58.5mm one clearly has vignetting.
第二組比較照片是信義區的摩天大樓群, 58.5mm這張明顯有暗角
f = 45mm x 0.8 = 36mm
f = 45mm
f = 45mm x 1.3 = 58.5mm
This dual lens set does not have coated lenses, so it may not have anti-glare capabilities. In practical terms, it's more convenient to use at the wide-angle end. The inconvenience lies in the four-step process for focusing: (1) using the parallax of the built-in viewfinder in the camera for rough focusing, (2) reading the focusing distance on the fixed lens, (3) checking the corresponding table on the external lens to obtain the actual distance, and (4) adjusting the focusing distance on the fixed lens to match the actual distance.
這套雙鏡組是沒有鍍膜的鏡頭, 所以應該沒有抗耀光的能力, 實用上還是以廣角端使用的機會較多. 較不方便的地方是需要四個步驟來玩完成對焦 (1)由相機內建觀景窗的疊影成向來對焦(2)讀取固定鏡頭上的對焦距離 (3)查詢外接鏡頭上的對應表取得實際距離 (4)調整固定鏡頭上的對焦距離至實際距離.
