[Klaus]

https://www.sigma-global.com/en/lenses/c..._400_5_63/

For E- & L-mount @ USD 950

Surprisingly it is a little different from the DSLR variant - but just as heavy.

[miro]

https://www.sigma-global.com/en/lenses/c..._400_5_63/

For E- & L-mount @ USD 950

Surprisingly it is a little different from the DSLR variant - but just as heavy.

As reference - Canon RF 70-200/2,8 is 1200g  / 1,070g w/o tripod mount. Keep in mind that Canon ware proud of achievement.
Canon premium magnesium casting shaves few grams but Sigma contemporary is not so shabby.
ANother ancor point is Canon EF 70-200 - weight 1460...1490g around all generations

[Brightcolours]

https://www.sigma-global.com/en/lenses/c..._400_5_63/

For E- & L-mount @ USD 950

Surprisingly it is a little different from the DSLR variant - but just as heavy.

As reference - Canon RF 70-200/2,8 is 1200g  / 1,070g w/o tripod mount. Keep in mind that Canon ware proud of achievement.
Canon premium magnesium casting shaves few grams but Sigma contemporary is not so shabby.

What a strange comparison you try to draw there. Puzzling.

To put things in perspective: The Sigma 100-400mm f5-6.3 weighs... 1140 grams. The Canon EF 100-400mm f4.5-5.6 weighs 1380 grams. They are totally in line, weight wise, when you consider their max. aperture difference.

[miro]

https://www.sigma-global.com/en/lenses/c..._400_5_63/

For E- & L-mount @ USD 950

Surprisingly it is a little different from the DSLR variant - but just as heavy.

As reference - Canon RF 70-200/2,8 is 1200g  / 1,070g w/o tripod mount. Keep in mind that Canon ware proud of achievement.
Canon premium magnesium casting shaves few grams but Sigma contemporary is not so shabby.

What a strange comparison you try to draw there. Puzzling.

To put things in perspective: The Sigma 100-400mm f5-6.3 weighs... 1140 grams. The Canon EF 100-400mm f4.5-5.6 weighs 1380 grams. They are totally in line, weight wise, when you consider their max. aperture difference.

I compare
1. RF vs RF lenses with different FL and aperture
2. RF vs EF same FL and max aperture
Can you make conclusion based on 2 examples

You are comparing
1. RF vs EF same aperture - Can I make concision based on your single example?

[davidmanze]

Christopher Frost has already reviewed the lens ....... no focus breathing !

https://www.youtube.com/watch?v=2MIyCMAfWwI&t=603s

[Brightcolours]

I compare
1. RF vs RF lenses with different FL and aperture
2. RF vs EF same FL and max aperture
Can you make conclusion based on 2 examples

You are comparing
1. RF vs EF same aperture - Can I make concision based on your single example?

If you want to think that somehow 100-400mm lenses for DSLRs should be not comparable to 100-400mm lenses for mirrorless, that your freedom.
You did not compare 
1. RF vs RF lenses with different FL and aperture
2. RF vs EF same FL and max aperture

I did not compare 
1. RF vs EF same aperture 

Another puzzling post?

[Klaus]

So the IS continues to be a bid ... meh.