[telephoto lens]

I agree with Tony above. Do you need the extra reach of 400mm. Many nature photographers tend to like wildlife or may eventually get into wildlife and the 100-400mm will serve you better. I personally don't see much of a reason to get a f/2.8 lens if you're taking photos of landscapes and will never shoot it at f/2.8. At that point, you're spending a lot of money on a feature you won't use. Hope that helps!

Thanks for your answer and help.

[telephoto lens]

Hi Erik

They are both great, it really depends on how much reach you need. If you want a lot of zoom, the 100-400 is a great choice. 

#FE 100-400mm F4.5-5.6 GM OSS 

Thank you for your reply

[telephoto lens]

Hello Together

I am a hobby photographer. I shoot with a Sony A7IV camera.

I have the lenses 16-35/4 Zeis and 24-105/4 G.

I am thinking of buying a telephoto lens.

Which would you recommend the 70-200/2.8 GM or 100-400 GM?

I like to take pictures in the mountains and also details of the mountains.

Thank you very much for your help.

Greetings from Switzerland, Erik