In summary so far, this thread informs us all that there are 3 different shoulder straps generally available on the market. This excludes the clearly excellent one-off strap by
@johnf3f.
A shoulder strap is a good example of what goes into any product and how it is most often a reflection of each manufacturer's input in terms of both component cost totals plus research and development/testing costs and of course manufacturing costs. Profit is the cream on the cake.
The conclusion I come to is as follows :
- Q-Strap : A brave effort to offer a cheaper alternative to the BlackRapid but appears to risk compromising its build quality by the choice of cheaper components to reduce costs and hence be more attractive to those who are primarily led by purchase price. Q-Strap claim they offer "
the world's best value camera sling strap" but that depends how you define "best value". It's functionality, and hence limitations, are similar to the BlackRapid. It looks to me as if Q-Strap have started off thinking that the BlackRapid is too expensive and consequently how can they produce a shoulder strap which is similar but cheaper. I would hope that Q-Strap are taking steps to improve their product so that at least they are equal to BlackRapid, but unfortunately the thread on TP does not
currently give me confidence. Their method of attaching their strap to tripod plates on D-SLR cameras is begging for trouble!
http://www.qstrap.co.uk
- BlackRapid : A good basic design and solution but a chain is only as strong as its weakest link and its metal attachment-to-camera features are not as reliable as I would prefer, mostly due to the attachment design. I also found that when it isn't holding the weight of a camera, it slips far too easily off the shoulder. I found that even the under-arm extra strap and additionally wearing it under a coat do not prevent this extreme irritation. I'm a 6ft guy with average body shape. BlackRapid appear to be a manufacturer with larger resources and financial overheads than Q-Strap's manufacturer and this is reflected in the purchase price. I expect that they have also spent more time and cost than Q-Strap have on development and testing and BlackRapid continue to refine their various products. In the face of real competition from Peak Design it will be interesting to see how they can compete apart from in purchase price but the designs are so fundamentally different I don't see how they can unless they copy some of Peak Design's features.
http://www.blackrapid.com
- Peak Design Slide : The designers will have examined the BlackRapid and decided they can offer a better functioning shoulder strap. Clearly better functionality and ease of use has been their primary objective rather than focussing primarily on the purchase price. By designing from scratch on a clean sheet and gaining substantial funding for development, they have produced a very effective solution. Yes, an early design in 2014 had a bad failure but they have been transparent about the event and revised the failed component design even offering free replacement to customers who have bought that early version. Their ethos is excellent and typical of successful companies - It gives customers faith in the brand. The PD Slide is very different from BlackRapid and Q-Strap in both its materials and design features and quite apart from superior ease of use it offers a more versatile system across a fuller range of camera gear. Even without the weight of anything hanging from the strap its grippy side (it's easily flipped to silky smoooth side which slides much better than the BlackRapid type of design) doesn't slip off the shoulder and that is a major practical consideration - BlackRapid taught me what it feels like to be a girlie whose bra strap keeps slipping off the shoulder (when slipping off unintentionally of course!).
https://www.peakdesign.com/product/straps/
Choosing the right shoulder strap for you is also a matter of what you individually feel physically comfortable with but it is, in my strong opinion, very unwise to be led by price alone. Neither is it a question of being paranoiac about strap failure < It's much more a question of simply caring about your camera gear whether it is expensive or not. A design which needs extras fitted by the user such as keyrings or cable ties, as in the cases of both Q-Strap and BlackRapid, is not a good and reliable design.