The BAT Cave 
Huh? What? |
Sigma 18-35 f/1.8 lens for Nikon I pre-ordered a Sigma 18-35 f/1.8 lens for Nikon from B&H Photo on June 14, 2013. It arrived by UPS on October 9, 2013 after a few delays that were never really explained, but it's here now! The interesting thing about this lens is that it is the only f/1.8 zoom lens that I can think of ever being manufactured by anyone. It combines the utility of several fast primes all in one (not so) compact package for the DX 1.5 crop family of Nikon cameras. I did some very quick testing straight out of the box with no tuning or anything, using my Nikon D7100. Test conducted October 9, 2013. Click on the buttons below the image to see the differences in depth of field at different apertures. I focused on the bat's camera right eye for both shots. 
Sigma 18-35 f/1.8 lens at f/1.8. Sigma 18-35 f/1.8 lens, 1:1 1536x1024 center crops from a D7100 at 35mm, tripod, mirror lockup. 40 sharpening with 70 mask in Lightroom. 
1:1 center crop, ISO 100, f/1.8, 1/60 second.
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This is the Sigma 18-35 f/1.8 lens for Nikon fresh out of the box with its included case and lens hood! Nikon 70-200 F4 lens used for photo.
This is the Sigma 18-35 f/1.8 mounted on my Nikon D7100 with an iPhone 4s in the shot for a size reference.
My Bengal cat Noctiva at f/1.8 and 35mm focusing on her camera right eye!