100-400 with Canon Teleconverter 1.4 Mark III - Not impressed

Started Jun 13, 2012 | Discussions thread
OP Hobbyman Regular Member • Posts: 208
Re: 100-400 with Canon Teleconverter 1.4 Mark III - Not impressed

Danack, you are right about #1 and I agree with it.

  1. 2 the photos look great. However, have you compared the same one shooting without TC and then enlarge them in photoshop?

Danack wrote:

The shot with TC looks about right to me however there are some things that would limit it's sharpness in your test.

1) I'm guessing it's taken at very close to the minimum focusing distance judging by the subject. The depth of field in focus is about 1cm at minimum focus so it's not a great test.

2) At that focal length, that's a really long exposure, even if you've got a tight tripod head.

Having said that my keeper rate is massively reduced when using the extender. I pretty much only use it when I and my subject are stationary but it does work:

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