Just nab one of these, super exited specially as I have a gig coming up next weekend. Next, get the speedbooster when it comes back to stock. Maybe someone has mentioned before but what lens will you match this with?

@PhilMyself It holds very tight. Better than other adapters i used before. Of Course it has some moving, but you need to rotate lens body to feel it, not focusing ring, and use some force.

Very keen on this sigma speedbooster combo for my bmpcc.. Anyone think it's size on the bmpcc will be an issue when mounting on a manfrotto monopod in regards to weight distribution?

@lmackreath your Pocket will make a nice rear lens cap :-)

Weight distribution will be very front heavy if flying naked. It'll be ok, but I'd be looking to mount at the rear of any plate to keep it to the rear.

Anyone used the Nikon mount version with the cheaper ($<30) m43 to nikon adapters w/aperture ring available at amazon?

Picked up a Nikon mount version and am using it on a GH3 with Novaflex adapter. Will post a vid soon, but here are some initial thoughts:

1. Incredible close focus distance, especially at 35mm. Seriously, we're talking 4 inches or something like that from the front element. I don't hear this aspect mentioned that much, so I thought I'd bring it up here.

2. Huge, heavy, unwieldy. I'm used to my SLR Magic 25mm, which is not exactly light. The sigma is a monster in comparison. I don't enjoy it nearly as much for handheld stuff. I see this as lens to use on a rig, either shoulder or on sticks. Also, I don't trust the gh3 mount+adapter combination over the long haul, so a lens support is probably a good idea.

3. Focus ring is very smooth, but if you're coming from great manual glass, it still leaves you wanting a bit more throw and fine control. Also as mentioned, definitely not parfocal.

4. As everyone already mentioned, it's very sharp.

5. With the novaflex, it focuses passed infinity...WAY passed infinity. Never experienced a lens going so far passed infinity. Ironically, the very expensive Novaflex has noticeable play where it connects to the lens. My $20 F to MFT adapter off ebay has zero play. The Novaflex is a rental though, so maybe it's been used and abused?

6. Colors look very natural and neutral to my eyes. Definitely less character than my SLR Magic, but still very pleasing. Bokeh is beautiful. Very smooth.

Short vid demonstrating macro qualities coming soon.

Let me know if you want any specific types of tests. I'll do my best.

_OZ

@_OZ:

About the Novoflex: The older version (with the fine "teethed" blue aperture ring) is quite bad. The newer model (with the raw teeth - or let´s call them grooves) is way better. Not (that much) play in the aperture ring any more, better fit all in all AND at least my model had less "over the infinity point" focusing.

Now that a BMPCC specific Speedbooster is coming, it'll really be the fastest wide zoom.

But it's true there are zooms for 2/3" with constant 1.2 speed out there, like the Computar 12.5 to 75.

I really waiting for nikon upgrade since d70s as Im with Panasonic Gh1 Gh1 Gh3 now and this lens is dream came throw for me for Nikon. Can someone tell me please how Autofocus of this Sigma works with nikon d5300 in video and photography?

Ive been waiting long time for Nikon in terms of video (still not there yet) Wanted to get one for pictures and video but I will not talk about Nikon here. Id like to get d5300 and sigma 18-35 now IF they work together well. I know there where issues before. I can't find any info since Sigma update (about AF in stills and not at all about AF i video) Test it in a shop its not the option for me :)

I tested this lens against 3 Rokinon cine primes and I had to stop each Rok down to t2.2 to get the same exposure as the sigma at f1.8

Well, I personally don't think the Roks are usable till 2.4-2.8ish and the sigma is better at f1.8 than the Roks are at 2.8.