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[其他] K-30 Firmware 1.01 Contrast AF test (S 17-50 F2.8 OS)

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發表於 2012-11-3 16:51:51 | 顯示全部樓層 |閱讀模式
本帖最後由 ckanthon 於 2012-11-3 05:07 PM 編輯

Have time to test the new firmware 1.01 AF performance (contrast mode detection) today.

Took nearly a hundred of photos and the finding was disappointing

The Contrast Detection Algorithm (version 1.01) did not support this thrid party lens well.
Nearly 80% pictures are out of focus (back focusing) when the object distance is more than 5m away (to infinity)!

I think the problem is caused by bouncing back of the lens HSM near the infinity end during the AF process.

Camera: K-30
Lens: S 17-50 F2.8 OS HSM
(Note: Tried both the original battery, AA battery, with and without SR)

更多圖片 小圖 大圖
組圖打開中,請稍候......
奇兩伯/18-55MkII/FA31/DA35/A09/S1750 F2.8 OS/數碼濫拍
DA*50-135/ Metz 50 AF-1
發表於 2012-11-3 16:58:00 來自手機 | 顯示全部樓層
3rd party lens may not have the similar data base for the distance feedback as pentax af lenzes but nice try
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 樓主| 發表於 2012-11-3 17:01:19 | 顯示全部樓層
本帖最後由 ckanthon 於 2012-11-3 06:56 PM 編輯



Tried it  out also with the Pentax lens DA* 50-135 F2.8.
No problem at (or near to) infinity for this great lens
奇兩伯/18-55MkII/FA31/DA35/A09/S1750 F2.8 OS/數碼濫拍
DA*50-135/ Metz 50 AF-1
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發表於 2012-11-3 19:53:13 | 顯示全部樓層
我用18-135反而又準又快
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