Minolta 미놀타 Dynax 800si(필카)와 렌즈문제에 대한 글.

어찌하다 Minolta 미놀타 Dynax 800si가 생겼습니다.

필카인데, 아무래도 35mm FF다 보니 92% 시야율을 감안하더라도 크롭바디만 쓰던 저에게는 신세계네요.

그런데 약간 문제가 생겼습니다. 800si와 같이 온 시그마 28mm F1.8 (2005년산) 은 800si에서도 Auto Focus가 잘 되고, 제 소니 a550이나 소니 a55 에서도 Auto focus가 잘 되는데,

다른 소니 a550이나 a55에서는 auto focus가 잘 되고 현재도 잘 쓰고 있는 기존 렌즈들 - 시그마 오식이, 소니 30마 - 가 800si에서는 auto focus가 전혀 되질 않고, 아예 바디에 m.focus 라는 메시지가 떠 버린다는 겁니다.

그러니까 시그마 28mm F1.8만 미놀타 Dynax 800si, 소니 a550, 소니 a55 세군데에서 모두 auto focus를 사용할 수 있고, 다른 렌즈들은 필카인 미놀타 Dynax 800si에서는 사용할 수 없는 겁니다.

그래서 검색하다 보니 아래와 같은 글을 볼 수 있었습니다.
그래도 여전히 의문이 남는 건 시그마 28mm F1.8은 어떻게 3군데 바디 모두에서 auto focus가 작동하게끔 되어 있는 걸까요. 

<출처 : FixYa http://www.fixya.com/support/t6065646-u_use_lenses_minolta_slr_camera>

If you have manual focus Minolta lenses, then they are not usable on anything other than other manual focus M35mm Minolta SLR's.

If they have the Minolta autofocus mount then they will physically fit onto any of the current range of Sony Alpha SLR's and also the discontinued Konica Minolta digital SLR's, but there will be some issues:-

• there will be a 1.5x magnification factor due to picture cropping caused by the digital image sensor being smaller than a 35mm film frame. As an example, a 70-200mm zoom lens will produce an image equivalent to that of a 105-300mm lens if mounted on a 35mm camera. Lens apertures are not affected by the 1.5 crop factor.
• Earlier Minolta AF lenses relied on the camera body providing the autofocus motor. Later Konica-Minolta and Sony models lack this motor so the lens can only be used in manual focus mode. 
  
• If you have a later SSM (SuperSonic Motor) equipped lens and want to use it on an Minolta Alpha/Maxxum/Dynax 9 (different model names in different countries), the camera needs a complete additional circuit board which is no longer available.
• Later Sony Alpha SLR's have far greater electronic communication with the lenses used. Many Minolta lenses will not be compatible and as Sony don't support legacy products there is no fix.

In short, Minolta MD lenses (manual focus) can't practically be used on any modern digital cameras, and Minolta Alpha (autofocus) lenses will physically fit onto a Sony Alpha digital SLR, but will act as if magnified and may not autofocus or work at all on a Sony SLR. But there's no harm in trying.

Sorry there is no absolutely definitive answer for you, but I hope that you now understand why and that you take a moment to rate my reply.