A behind the scenes look at the worlds largest photo: How the 320 Gigapixel London panorama was made, by LJ Rich at the BBC

I had some fun poking around the pano when it was first unveiled, looking for fun curiosa and crazy artifacts, and sure enough, everything from kitchen coops on balconies and image stitching mishaps on an Agmageddonian scale, its all there. But looking at the sheer scale of preparations makes one appreciate the hard work done by the 360cities team behind the pano. Some quick facts: 4 Canon 7D's were used, each with a 2x converter and a 400mm EF lens. Each camera took around 13.000 pictures, while mounted on a sturdy robotic Class Rodeon VR pano-head. The work was finished after only 4 days of shooting, and 3 months of stitching, done in Autopano Giga from Kolor.

Canon EF 400mm f/2.8 L IS II USM Lens Review @ The-Digital-Picture

"The answer to the second question was quickly answered upon lifting the Canon EF 400mm f/2.8 L IS II USM Lens with a Canon EOS 1D Mark IV mounted, to my eye during the Canon Expo 2010. I can handhold this one! I cannot understate the dramatic difference in weight - and this weight difference starts making the difference in price appear smaller (especially if shoulder or back surgery is . . . read more

Canon EF 400mm f/2.8L IS II USM review at SLR Gear

"Again, results for tolerance to chromatic aberration are excellent, with extremely low testing results. Looking at our sample images, I'm hard-pressed to see any form of color fringing in high-contrast areas.

Shading (''Vignetting'') 
On the sub-frame 7D, there is no corner shading to speak of at all with the 400mm ƒ/2.8 II mounted; on
Overview

Description by Canon:

Ultra-high-performance L-series super-telephoto lens, featuring a 4 stop Image Stabilizer with 3 modes. The EF 400mm f/2.8L IS II USM delivers outstanding image quality in a robust design ideal for sports and wildlife photography.

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