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The Sigma 500 f/4 for DSLR has fantastic IQ and acceptable AFc but at 64 years I found it too heavy for me to lug around at sport or on safari. Weight was the main reason I switched from Canon to the SL2/M10. I love my 90-280 but it is too short for small or distant wildlife. I wouldn't hesitate to get the 150-600 for the times when I need that extra reach.

  

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I thought about the same issue, should I decide that I want some longer telephoto for wildlife/bird photography I would not tinker with Leica and would get Nikon or Canon. Performance would overcome brand loyalty.

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  • 4 weeks later...
3 hours ago, Artin said:

I have not done much with photography in the past 2 years but now picked up the camera again , that sounds intriguing. I may just pick up a 150-600 

In the event that you do decide to pick up or test the Sig150-600mm, kindly provide feedback on it's AFC comparing to your Canon 400mm 2.8 or other lenses.

I found that the success rate on getting sharp pics on SL2 with AFC works on Sig 150-600mm but success rate is much lower than SL90-280mm. I'm not sure if it were due to Sig 150-600mm limitation or is is common over longer telephoto lenses that AFC success rate reduces on general?

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1 hour ago, sillbeers15 said:

In the event that you do decide to pick up or test the Sig150-600mm, kindly provide feedback on it's AFC comparing to your Canon 400mm 2.8 or other lenses.

I found that the success rate on getting sharp pics on SL2 with AFC works on Sig 150-600mm but success rate is much lower than SL90-280mm. I'm not sure if it were due to Sig 150-600mm limitation or is is common over longer telephoto lenses that AFC success rate reduces on general?

The Canon mounted on the SL2 via the MC-21 adapter only gives you AFS, AFC isn't available.

I also think that AFC is more efficient with shorter focal lengths & is generally slower with longer focal lengths.

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1 hour ago, jaapv said:

I only use AFC on a long lens with tracking -which is difficult enough at 600 mm anyway. 

I'm trying out AFS / Field combination shooting BIF to see if the sharp pics success rate can improve? Yet to conclude.

Previously on SL90-280mm, applying AFC / Tracking combined with viewing through a dot sight device attached on the SL2's hotshoe provided me good AF success rate.

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