用增距鏡有冇大影響?

用D80, 想加個extender配70-30 vr.
光圈會細左,但係成像上會唔會有大分別??
因為想再遠一點,但係冇錢買一枝再遠既鏡

70-300?
咁要視乎你用咩增距,有D增距D鏡片質素較差,會影響畫質,不過我見過人用又唔覺得有太大分別,可能我眼力低人一等LA.
不過我都唔係好熟邊隻好.請教其他大師LA.
幫推

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70-300vr係加唔Nikon原裝增距鏡~~雜廠就唔知
最好都係唔好加

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加了質量一定下降,但是會比原鏡影完局部裁出來再放大好,所以要有1支備用,但最好不用

小心,如果你用小光圈鏡,加了2X後可能對不到焦,一定要帶機帶鏡去試暗位能否對焦

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原帖由 kw223 於 2009-10-22 09:13 發表
70-300vr係加唔Nikon原裝增距鏡~~雜廠就唔知
最好都係唔好加


用番nikon原廠增距都唔得?
邊度有寫用唔到架,係70-300VR 個spec寫?

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原帖由 hkmcdull 於 2009-10-22 09:47 發表
加了質量一定下降,但是會比原鏡影完局部裁出來再放大好,所以要有1支備用,但最好不用

小心,如果你用小光圈鏡,加了2X後可能對不到焦,一定要帶機帶鏡去試暗位能否對焦



小光圈係去到點先叫小? f5.6算唔算細?定係講緊再細?

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原帖由 正宗球迷 於 2009-10-22 17:45 發表



小光圈係去到點先叫小? f5.6算唔算細?定係講緊再細?


If you use lens with f/5.6 and you add a 2x to it, then it is quite sure that you won't be able to use AF...

The ability of AF is usually for lens with max aperture on or above 5.6.
Let's say that you are using f/4 lens, it'll become f/4*1.4 = f/5.6 after using the 1.4x extender, that means you can still use AF after using the extender.
If you use 2x extender, f/4*2 = f/8 after using 2x extender. So it is impossible to use AF anymore.
For your case, f/5.6*2 = f/11, so it is impossible to use AF after the extender.
CHing Please correct me if I make mistakes. Thanks.

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原帖由 正宗球迷 於 2009-10-22 17:44 發表


用番nikon原廠增距都唔得?
邊度有寫用唔到架,係70-300VR 個spec寫?


manual says Incompatible accessories
-Teleconverters( all models)

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zoom lans得呢兩支用到增佢鏡~~

AF-S VR Zoom-Nikkor 70-200mm f/2.8G IF-ED

AF-S VR Zoom-Nikkor 200-400mm f/4G IF-ED

http://www.nikon-asia.com/productitem.php?pid=680-47037f18fe

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成像質素會大幅下降

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