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Photography Review - Canon EF 400mm f/5.6L USM lens + Canon Extender EF 1.4X III

Posted by birder on Friday, August 2, 2013
In the morning today I decided to purchase the 1.4x extender III to try it out on my bird photography lens, the Canon EF 400mm f/5.6L USM. Here are my thoughts:

-I am very impressed with the photo quality with the product! I honestly can't really see any degrade in quality of the photos taken with the extender.

-The 1.4x teleconverter bumps up my 400mm to become a 560mm, which is very useful.

-I tried out the taping pins trick so I could try out the autofocus, and here are my thoughts:

-When the light is bright, the autofocus is fine and focuses fairly fast and accurately.

-In the dark the autofocus is very hard to use, so manual focus is better option in a low light situation.

-In a situation where the light is not low but not really bright, you can manually focus so it is near perfect and then when you try to autofocus the extender almost always focuses accurately.


Overall I am very impressed! I will test it more on my next birding outing.

Here is a test that I did:

This photo (cropped heavily to see detail) was taken with autofocus (with the pins taped to enable it) using the teleconverter and my 400mm lens.

Click here to see the photo
Looks great to me- focus is accurate, no odd colouring or anything like that.


This photo (cropped heavily to see detail) was taken with a manual focus using the teleconverter and my 400mm lens.

Click here to see the photo
Not as accurately focused as the one taken using auto focus, but when I manual focus with the teleconverter I guess I will have to expect my photos being a tiny bit out of focus like this one.


This photo was taken without the teleconverter, just my 400mm on the camera body and has been cropped to match the other photos.

Click here to see the photo
The focus is like the one focused with the pins taped on the teleconverter. The main difference is that this one is pixelated, if you zoom in so it is the size of the other photos.


Conclusion: In bright, good light, I would definitely use the teleconverter on autofocus with the pins taped. In situations where the light is not as good I will probably just use the lens without the converter, unless I really need the reach or am photographing something not moving much like a bird on its nest.



 

 

 

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