Linda Ewing wrote:
Thank you that was very helpful, I go for Sigma because of the price difference. I have a Nikon 810, but have, in general, been a little disappointed with the 50-500 4.5 to 6.3 apart from being heavy it does not focus well enough for BIF. I will be purchasing one of the ART lenses like the 85mm though as now you have explained it to me I understand more about the difference. Thank you once again.
The Sigma 50-500 is not a great lens.
The Sigma 150-600 is quite good (I have it).
The 150-600 G2 from Tamron is even better ( so I have read) (35% cost premium over the SIgma)
...and the 85mm will focus quickly and accurate for most indoor sports and the IS/AF on my 5DmkIV will allow me to shoot in the dark :-)