Originally Posted by bburns223
Yes, the I.S. on the 300mm f/4 is marketed as "only" 2 stops, but that does not mean it is not a factor. For example:
- 300mm f/4 + 1.4X TC ISO 1600 1/125
- 400mm f/5.6 ISO 6400 1/500
There's a huge difference in noise between ISO 6400 and ISO 1600, even though it's "only" two stops.




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