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Blackmagic Cinema Camera + Sigma 18-35mm f1.8


pcenginefx

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hey aaron, thanks for posting this! beautiful footage and solid moves!

i have a question, if you don't mind answering. how does the focus ring on the sigma feel?

i know it's fly-by-wire, but i'm really hoping it is a good iteration of fly-by-wire.

i just pre-ordered one for my pre-ordered BMPCC + Metabones Speed Booster. i'm used to using the Voigtlander 25mm f/0.95 though, which has a very delicious feel to the focus ring.

all insights are welcome!

thanks in advance,

oli

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hey aaron, thanks for posting this! beautiful footage and solid moves!

i have a question, if you don't mind answering. how does the focus ring on the sigma feel?

i know it's fly-by-wire, but i'm really hoping it is a good iteration of fly-by-wire.

i just pre-ordered one for my pre-ordered BMPCC + Metabones Speed Booster. i'm used to using the Voigtlander 25mm f/0.95 though, which has a very delicious feel to the focus ring.

all insights are welcome!

thanks in advance,

oli

 

Hi Oli - glad you enjoyed my footage!  So the focus ring is VERY solid and smooth - I own Canon L and Zeiss lenses and it is just as good as my Zeiss.

 

I'm not sure where people are getting the idea that the Sigma 18-35mm f1.8 is a "fly-by-wire"/"focus-by-wire" design....it is my understanding that a focus-by-wire lens requires an active connection to the camera body to operate - in the case of the Sigma 18-35 f1.8, it does NOT need to be connected to a lens to adjust focus.

 

 

Hi Oli

Is the focus definitely fly by wire? Would that not mean it needs power to focus? I'm hoping the focus is directly coupled but without a hard stop. Ideally It'd have a hard stop though.

Unfortunately, the lens does not have hard stops :(

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  • 5 months later...

I have a question, excuse my being suspicious fellas but, check out this test of the sigma 8-16mm on the pocket. (hang on, my question is about the 18-35) http://www.onerivermedia.com/blog/?p=677

The 8mm focal length of the Sigma and the 8mm of the Canon produce different results with regard to FOV. Either the Canon is wider than 8mm or the Sigma is really closer to 10mm. Most likely the Sigma is a 10mm given it's the only "supposedly" 8mm rectilinear. I simply don't buy that it's an 8mm after I saw this test, which makes me wonder, are the guys from Sigma bragging about their record breaking lenses by lying to us? In other words, is the f1.8 on the 18-35mm really a 1.8? I'd seriously love somebody to make sure it is, and then I buy it.

 

It's easy to make that test, compare the sigma @35mm 1.8 against a prime nikon 35mm @1.8 and see if light truly is the same in those shots.

Again, I'm apologizing to anybody who works at sigma for this, and if such a test would show I'm wrong, I'm buying the lens (18-35).

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