Canon 70-300 mm IS USM II on Canon 80D

Started 2 months ago | Discussions thread
OP AhmedH87 New Member • Posts: 11
Re: Canon 70-300 mm IS USM II on Canon 80D

gscotten wrote:

AhmedH87 wrote:

Thanks George! Now that it's official and @ 300 mm (equiv. to 480 mm) and f5.6 (equiv. f7.84), what shall I expect in terms of image sharpness and/or ISO noise? Taking in to account, that this setup is meant for BF, where high shutter speeds and quick focus are inevitable.

Have you tried this lens with the 1.4X TC on Canon 80D yourself?

I do not have a teleconverter so I can not attest to the sharpness.

The camera focus is dependent on the actual f/number of the lens, not any "equivalent" number. At 300mm, that is f/5.6. With a 1.4x TC, that is f/8. The only reason why ISO noise would change is because you will be shooting with a stop slower lens, so with the same shutter speed your ISO will necessarily double.

I ordered the DGX 1.4X and I will give it a try.. I will make sure that everybody here knows the results as I didn't find any useful information elsewhere about this experiment.. Thank you again!

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