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andy413hk
註冊: 2009-07-20
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 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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影蟲蟲,蝴蝶,花花草草.....
100mm f2.8 Macro USM 夠用嗎??????
有無防震重要嗎??????
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h0001244
註冊: 2007-04-19
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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I don't have it, but after a photo activity yesterday for butterfly hunting. My suggestion is that
蝴蝶 a bit longer in focal length might be easier to handle as butterfly will fly away if you are too close, 150 or above might be easier to control.
花花草草 should be okay, as they won't walk away
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andy413hk
註冊: 2009-07-20
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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H0001244 CHING
我想知 MACRO 鏡 1:1 係點解
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will爸爸
註冊: 2009-06-10
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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百微其實真係影蝴蝶既話係唔夠用......我一向都用百微但已經覺得支鏡不足了, 如果你想影多d蝶, 150mm以上既選擇會好好多
macro 1:1 即係指在CCD上成像大小與實物等比例, 即1cm的物件在感光元件上拍到也是1cm, 而1:2就是1cm的物件在感光元件上只能拍到0.5cm大小, 表示1:1能拍到既detail會比1:2清晰
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will爸爸
註冊: 2009-06-10
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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100mm macro 所拍
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will爸爸
註冊: 2009-06-10
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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[img src="http://lh3.ggpht.com/_40boei_s1N0/S2ahsw8V7II/AAAAAAAAAYU/NnSYkl0arHw/s640/IMG_4220.jpg" width=400 height=301]
[img src="http://lh4.ggpht.com/_40boei_s1N0/S2ahub0cMnI/AAAAAAAAAYc/lCDksj4G3FM/s512/IMG_4235.jpg" width=301 height=400]
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andy413hk
註冊: 2009-07-20
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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有無防震重要嗎??????
SIGMA 150MM OK ???
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cy001
註冊: 2007-08-29
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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will爸爸
i'm not fully understand 1:1. eg. if i take the 1cm subjuct, the image in my CMOS is also 1cm. But i close the subject or leave the subject more, the result will get the same?
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卍明仔卍
註冊: 2009-09-26
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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因為未有marco我都吾太清楚想攪清楚
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是否要達到枝鏡所講的比例.就要用最近對焦個位先可以呢
例如枝鐘150mm marco 最近對焦10cm 放大率1:1<<我亂作
就是用這枝鏡時在10cm距離就可以得到最大的放大率而個放大率是1:1??
如果枝鏡mm越大. 最近對焦距離可以越達都維持到1:1放大率??
見有時60mm marco 又有100 mm marco 都吾識選...
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andy413hk
註冊: 2009-07-20
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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因為未有marco我都吾太清楚想攪清楚
.
是否要達到枝鏡所講的比例.就要用最近對焦個位先可以呢
例如枝鐘150mm marco 最近對焦10cm 放大率1:1<<我亂作
就是用這枝鏡時在10cm距離就可以得到最大的放大率而個放大率是1:1??
如果枝鏡mm越大. 最近對焦距離可以越達都維持到1:1放大率??
見有時60mm marco 又有100 mm marco 都吾識選...
我都想知........................
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h0001244
註冊: 2007-04-19
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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I don't have any Macro lens yet
but as I understand
The macro lens (1:1) gets the image of 1cm from an 1 cm object when it is on minimum focus distance.
eg.
100mm at 0.31m from frame to object obtains 1:1
150mm at 0.38m from frame to object obtains 1:1
180mm at 0.46 from frame to object obtains 1:1
therefore when the above lenses all at 0.46m, 180mm obtains 1cm, 150mm obtains less than 1cm, 100mm obtains even smaller.
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JSmith
註冊: 2006-07-18
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 1 日 |
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明仔 & h00011244 are correct.
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will爸爸
註冊: 2009-06-10
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| Re: 100mm f2.8 Macro USM 夠用嗎?????? Post time: 2 月 2 日 |
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Re: cy001
will爸爸
i'm not fully understand 1:1. eg. if i take the 1cm subjuct, the image in my CMOS is also 1cm. But i close the subject or leave the subject more, the result will get the same?
no!! 因為1:1只限無支macro鏡既最近對焦距離, 近過呢個距離對唔到焦, 遠過只會影到 1:2 or 1:5 並不能影到1:1既size
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