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Canon 200-400 F4 or 400mm F2.8 ?

Started Oct 16, 2015 | Questions thread
RogerZoul
RogerZoul Veteran Member • Posts: 3,243
Re: Canon 200-400 F4 or 400mm F2.8 ?
1

Steve Balcombe wrote:

Myrgjorf wrote:

ISteve Balcombe wrote:

nimtree wrote:

Does the 200-400 zoom sucks dust? How is the in built teleconverter, useful ? Not sure if I want to use the in built one and make it a slow F5.6.

Internal or external makes no difference - any 1.4x TC costs a stop of light.

I don't agree. In my experience the built-in TC takes less IQ hit than the external (Canon x1.4 mk3). Both makes it a 280 - 560 F5.6 though.

For goodness sake, I didn't say anything about IQ. The external TC makes it 27 mm longer and 225 g heavier as well, but I didn't say anything about that either.

Little confused here. The OP asked how is the in built TC, useful or not. You said it makes no difference you just lose a stop of light. The other poster said the in-built TC has better image quality, which conflicts with what you said since you *implied* that there is no difference in IQ. Hence, you did say something about IQ.  It also makes very little sense to buy a lens with an in-built TC if you don't plan to use it, or use an external one.

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