Tamron recently released their new 150-600mm lens to much fanfare, and it seems that Canon took notice and may have a replacement for their own 100-400mm F/4.5-5.6 in the works.

100-400mm IS USM Telephoto Zoom Lens-canon-digital

According to the rumor report over on Canon Rumors, this new updated 100-400mm F/4.5-5.6L replacement lens would be released shortly after the rumored 7D replacement is announced. That announcement is expected at Photokina in September, so it is possible they will announce this lens replacement late September or October of this year.

[Rewind: Latest Canon 7D Replacement Rumors]

The rumor has little in the way of details about this new lens, other than that it will NOT be a push pull design like the current version and that it will also be more expensive than the current model. Not a good thing if you ask me, the current model is already overpriced, so if the next model, barring some incredible tech/quality advancement, is even more expensive, I am a little disappointed in Canon.

Still, there is a long time between now and the possible announcement of this lens. Things could change. I am curious of your thoughts on this lens? What does it have to do to be a more attractive option over the new Tamron lens?

[via Canon Rumors]