jcmthk 寫:
Richard Tam 寫:
其實我睇左都唔明ZF跟ZF.2既分別...
如果我用d700, 係唔係ZF同ZF.2既分別只係有EXIF data? 定係我手動set左先插ZF鏡, 其實就係一樣?
ZF.2 has electronic contacts which allows your D700 to read the Lens Data from the lens, straight off the shelf. This makes the lens equiv. to Nikkor AI-P.
ZF.1 has no electronic contacts, hence user MUST set the Lens Data. For example, if you change your lens from 50/1.4 to 25/2.8 without manually set the Lens Data accordingly, then all Auto Exposure Measurement would be off by 2 stops. (Since 1.4 and 2.8 are differ by 2 stops.) This is more serious than the inaccurate EXIF data.
ZF.2 would eliminate this problem once for all.
What you mention about ZF.1 is completely wrong........
To my experience on D3 and S5 Pro........if you do not set the lens data from the menu that would simply result in wrong EXIF data only
TTL exposure in all cases would not be affected.
The reason is:
1. The metering system is always TTL, no matter the lens is f/1.4 or f/2.8, what does matter is the EV value always for ISO & shutter speed combination. (You may think of the situation of using modified lens on Nikon DSLR of D200/D300 or above, A mode just work fine without the input of any lens data)
2. The aperture ring of Nikon AIS / ZF.1 would feedback the aperture ring information mechanically back to the camera body (only on D200/D300 or above models), so that when you stop down the aperture ring, the camera body would know how many stops had been turned actually and adjust the shutter speed accordingly (as compensation).
3. Think about the situation in F5 and older models.........there is a small optical window in the viewfinder to let you actually "see" the aperture setting.....
To me the good thing of ZF.2 is
1. No need manual input of lens data (but for EXIF only)
2. Using control dial on body to set aperture vlaue (if one prefers....)
And to me the good thing of ZF.1 is therefore:
1. Allow setting of aperture value by aperture ring mechanically (For Nikon AI-P / ZF.2 with CPU, the aperture ring must be set to smallest aperture value for A / P mode to operate)
2. More classic look with the "Prong style meter coupling " lever
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