必思

二代
settrick 發表於 2016-8-24 20:20

    幾錢？

jeremymak

xe2

jeremymak

xe2

settrick

幾錢？
必思 發表於 2016-8-24 21:07

    銀950
    黑1150

jeremymak

http://www.photozone.de/fuji_x/985-fuji35f2?start=2

Fujinon XF 35mm f/2 R WR (Fujfilm) - Review

Finally we have to answer the question how the Fujinon XF 35mm f/2 R WR compares to the Fujinon XF 35mm f/1.4 R. When looking at our ratings the answer is obvious. Yes, the f/2 lens is sharper at all overlapping apertures. The weather sealing as well as the faster AF are also on the plus side. Yet .. nothing beats speed but more speed. If you simply require an ultra-large aperture as well as a superior bokeh, the XF 35mm f/1.4 R is still the better choice - also because it isn't that much more expensive nor much bigger.

我全完同意

jeremymak

http://www.photozone.de/Reviews/986-equivalence


富士係apsc
Equivalent Speed大家又有冇留意??

wingkps2

回覆 526# jeremymak


    貢多英文.....睇死我.

calvin83

富士係apsc
Equivalent Speed大家又有冇留意??
jeremymak 發表於 2016-8-24 22:44

ED Equivalent 乜乜,  只用一個系統根本需要理佢.

jeremymak

ED Equivalent 乜乜,  只用一個系統根本需要理佢.
calvin83 發表於 2016-8-24 22:56

    唔中意可以無視

jeremymak

Equivalent Speed

The next toad to swallow (one more to come thereafter) is speed. Some may argue that the 150mm f/2.8 (MFT) and 200mm f/4 (APS-C) are faster than the 300mm f/5.6 full format lens. Well, this is true for the naked lens but it is actually a debatable observation when comparing the SAME OUTPUT QUALITY - that is by taking the camera into the equation again.
Let's assume that we have 3 different system cameras with 20 megapixels at ISO 200. I think we can agree on the fact that the image noise is best on the full format camera, followed by APS-C followed by Micro-Four-Thirds, right? Now ... what amount of increased image noise are we talking about here? There are, of course, variations due to different sensor technologies but let's assume for a moment that they all rely on the same ingredients. So ? Well, ISO 800 on full format will give you roughly the same image noise as ISO 400 (more like ISO 340 actually) on APS-C and ISO 200 on Micro-Four-Thirds. Or in other words - based on the same output quality - and this is the only thing that counts - full format has a 2 f-stops advantage over Micro-Four-Thirds and roughly 1 f-stop over APS-C.