18-35mm F1.8 Sigma DC zoom lens

kholi

I watched the video before it started re-converting.

Although I can't stand what the SB does to Bokeh wide open, and I can see it in this example, this looks good to me. Was already likely going to pick up an SB just because I no longer want to mix lenses on my cameras, but it's good to see more encouraging examples.

Thanks for posting.

ala_img

Some more GH3+Sigma 18-35+Speedbooster frames

dracore

Any sample video clips for GH2+SB at the wide end? I'm curious to see how noticeably vignetting affects video?

ala_img

@itimjim I made some more tests and i can say that Panaleica at 1.4 is even slightly brighter than sigma + speedbooster. Tomorrow i will try to upload some frames.

itimjim

About the difference between 1.4 and 1.2? :)

ala_img

@vicharris I mean - slightly brighter, but almost no difference.

itimjim

@vicharris I'm reading that as brighter, not less heavy. I've seen lighter canon balls than the Sigma 18-35 :)

vicharris

@ala_img What do you mean by "slightly lighter"?

ala_img

@brianc1959 It is not scientific test) I just compared it with wide open samyang 85mm f1.4 and Panaleica and saw difference on my monitor

brianc1959

@ala_img: f/# or T/#? What measurement technique did you use?

ala_img

Real max aperture of Sigma 18-35mm + speedbooster is about 1.4. I am check it. It is just slightly lighter then Samyang 85mm at 1.4, and same as Panaleica 25mm at 1.4

Gerondo

RAW photo sharpness > Sigma 18-35mm with Speed booster and GH3 > 400% , 100% and actual photo.

Gerondo

@ala_img Great flares! It looks like a killer combination!

oscillian

That's it, my Voigtlanders are going on eBay. Love the flares :)

ala_img

This is just quick shaky frames. All frames was taken with wide open aperture on gh3. pass: PV

oscillian

@ala_img Ok, thanks!

ala_img

@oscillian Full focus is about quarter (90 degrees), and it can focusing very close, almost like macro lens.

oscillian

@ala_img Great to know :) How long travel to do a full focus turn from infinity to up close? Half barrel? Quarter?

ala_img

@oscillian Focus is smooth enough. Not so smooth as Voigt, but comfortable anyway. I am just got my super combo - Sigma+Speedbooster+LCW fader. I am happy about it, but LCW is crap, Polaroid fader much better. Today i am already make some work with it, but have no rights to show it for you. But i have some quick street frames, near post office where i recieved this combo. I will upload it soon.

oscillian

@Gerondo Fantastic! This is cinema glass quality :) Almost no breathing, parfocal, constant aperture and with the speed booster you get declicked aperture?

How is the focus travel? It looks like you could pull rather smoothly.

lonely1

Tomorrow i finally have the Nikon Mount version of this lens after a long search and wait till the product finally was in stock again.

I have ordered the Nikon G speedbooster as wel, which will be delivered next week. For now i can use a standard Nikon G to MFT adapter. If anyone is interested i can post some footage of this lens on the regular adapter tomorrow.

Brian202020

This lens really is magical in many ways. That breathing test is impressive to say the least.

konjow

Im wonder if anyone seen This lens results of Autofocusing in video on Nikon cameras?

nomad

Very impressive at 35mm. Hard to judge at 18, since there's not much detail on the wall.

Quite some distortion at 18, but then a Panny 12mm has even more on a BMPCC.

Gerondo

@oscillian Breathing test Sigma 18-35mm f1.8 with Speed Booster in the extreme ends: 18mm and 35mm. Aperture wide open. Distance between door in front and computer screen in the back is 7,5 meters

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