This is just an update on the series of previous posts about the biggest/most expensive lens in the world.
After Leica (1600mm) and Zeiss (1700mm), now it seems that Canon will be the winner with 5200mm/f14 lens (the picture is from eBay - this lens was for sale a while ago):

Now I know how "Canon" got its name. More info on this monster is available here.
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5 Comments
What’s next? A a kind of Hubble telescope?
Remember it’s not how big it is, it’s how you use it =^)
Does that actually mount on an SLR body?
i wonder if it could be used for macro photography? What’s the closest it can focus?
Must ask Lowepro a special bag for this