Swimming_trouble_718 wrote:
I’m going to have to decide if I want to go with this over my 300mm 2.8 GM. I love that lens but switching teleconverters is annoying and because I do a mixture of landscape and wildlife I end up switching between my 24-70 GM II, 70-200 GM II, and 300mm 2.8 (with various teleconverters) frequently. This lens is bigger and heavier than the 300mm but with it I could realistically just use a 24-70 GM II on one body and the 100-400 on another and have my bases covered for wildlife and landscape.
Any other 300mm 2.8 owners in the same boat?
As a 300mm GM owner I was looking to trade for this new lens. I use the 1.4x almost exclusively on the 300mm for small bird in flight stuff because it's still fast. The downside is that the MFD is 6.6' @300mm. Not sure what it is 420mm but it not a good choice for my use cases some of which involve macro and dragonflies. Was hoping this lens would match the .35x magnification of the current 100-400mm GM but it falls short in that area
May 13, 2026 at 10:03 AM
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