Sigma 18-35 w/ speed booster=Voitglander 17.5 & 25mm combined plus more...

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Heyseuss Hoolio
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Sigma 18-35 w/ speed booster=Voitglander 17.5 & 25mm combined plus more...
10 months ago

Came across this, though the article is a few months old.

http://www.eoshd.com/content/11855/olympus-om-d-e-m1-review-video

Sigma 18-35 f1.8 with the Nikon G to m4/3 speed booster would equal approximately 13-25 @f1.2

Though it's not f.95, f1.2 is pretty close, about 1/2 to 2/3 stop i believe. But this covers your 17.5(35mm equiv.) and the 25(50mm equiv) both at f1.2, and at 13mm wide gets you about 25-26mm equiv.

According to the review the image quality of the sigma with the speed booster was quite a bit better than the Voigtlander(s) wide open.

Just thought it was interesting, of course it's bigger, but it covers a decent range for a lot of stuff instead of carrying multiple lenses. The sigma and speed booster together basically covers all the native prime lenses and is faster-Oly 12mm, Panny 14mm, Oly 17mm, Panny 20mm, Panny 25mm, Oly 25mm. Throw an extension tube in there it can be a wide angle macro or take off the speed booster and put a standard adapter for more zoom and you get the 18-35 back at f1.8, a 36-70 equiv. Seems there's a lot of possibilities with this setup. So in a way it's with and w/out the speed booster it's like a 13-35mm f1.2-f1.8 lens. Would you pay US$1200 for a lens like that? Then maybe add one of the other F mount fast zoom lenses of your choice, 24-70 f2.8 maybe, which is like a 17-70mm f2-f2.8. Again, obviously it's not small but if you're not in a situation where you need one of the small primes a two lens setup like that is pretty drastic.

How are the edges with the sigma and speed booster. Most searches reveal it's use with the black magic cameras, though I did find this which the sigma was put on a canon 1D used at 1.3 crop and only had slight vignetting at 18mm but at 35mm with no crop it worked. http://www.flickr.com/photos/srontgorrth/9243310893/in/photostream/ http://www.fredmiranda.com/forum/topic/1225718

Here is a 35mm DX with the speed booster showing better results when compared with the Panny 25mm. http://www.dpreview.com/forums/post/52114286

So according to some of the examples it's very quite possible it works well with the speed booster.

Canon EOS-1D
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