Canon EF 2x III Extender

August 22, 2015  •  Leave a Comment

In a recent blog post, I described a dilemma I found in myself debating regarding my Canon 70-200mm 2.8L Lens (post can be read here ).  I want to start adding Wildlife images to my portfolio and submit to Getty for sale to Greeting Cards and Calendar companies etc.  The problem I have is that my 70-200mm 2.8L does not have zoom the capacity to get close enough to the action.  The lens required for the job - the Canon 300mm 2.8L or 400mm 2.8L cost's an astronomical amount of money.  By that I mean you could buy a small car for the same investment!

As no commission or image sale at the level I am working at is ever going to warrant the investment, the only solution was to buy  a Canon 2x III extender.  What is one of these I hear you say?  Pictured below is the Canon 2x III extender which I nipped into the studio with this afternoon to capture for this blog post-

Canon 2x III ExtenderCanon 2x III Extender

The Canon EF 2x III Extender mounts between a Canon EOS Digital SLR and a compatible lens (primarily Canon L Series lenses), extending the focal length of the lens by a very noticeable 2x. The huge focal length increase of course comes with some penalties, including a modest financial cost, some size and weight addition and more impacting, a decrease in image quality  and maximum aperture.

A disadvantage brought by the use of a 2x extender  is that the lens' max aperture setting is reduced/narrowed by a 2 stops – allowing at most 1/4 as much light into the exposure. So in my case, my Canon 70-200mm 2.8L becomes a 5.6.  However, my maximum reach is now 400mm.

Earlier today, I set up a hide at the bottom of my garden and photographed the Blue Tit's which visit the feeders I have postioned up in an apple tree.  As reported with the use of an extender, there is a notch of reduced image quality but it really is only a small amount.  However, the improvement in bokeh (the area of blur on the background) is actually quite staggering. I am really pleased with this element.


The litmus test is really whether the images are good enough to sell.  I will submit them to Getty and see if (1) they accept them and (2) if they sell!

I purchased this extender second hand on eBay for a notch above £200.  For that level of investment I am happy..... however, I still want the Canon 300mm 2.8L but that will have to wait for now!  A small sample of today's shoot are below:-

Blue TitBlue Tit
Blue TitBlue Tit
Blue TitBlue Tit



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