Hi Alexander and welcome:
I have a lot of long, heavy tele zoom lenses and I don't use a strap attached to the camera - this includes FF bodies with the Sigma 150-600c and the heavier 60-600s. I use a holster that will store the body and lens, and it can be either used with a cross-body strap (not hung around the neck which is painful). For that I had two solutions:
1. A Lowe-Pro ProTactic TLZ 75 AW II - good for a body and 150-600c without a battery grip.
ProTactic TLZ 75 AW II - LP37279-PWW | Lowepro Global
2. A Think Tank Digital Holster 5D - this will also work with a battery grip and can be attached to a thick supporting waist strap to take the weight onto the pelvis rather than shoulders.
Digital Holster 50 fits gripped DSLR, 70-200mm with lens hood extended – Think Tank Photo these are currently on sale. It also takes the Sigma 150-600 with the lens hood reversed.
The benefit of a holster is that one can get the camera and lens out, but not have to deal with a dangling shoulder strap that can get in the way. Furthermore, the holster provides padded protection (for both user and camera) and weather protection - the holsters come with rain covers.
cheers, TREVOR
The mark of good photographer is not what they hold in their hand, it's what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
