This Blog is for users and those interested in knowing more about the BosStrap Camera Sling System and other BosStrap LLC products. You can see our full product line at http://www.BosStrap.com. We welcome your comments, experiences with our products, and suggestions to improve our products. (To add a comment, click on the "comments" link below.) Thanks for visiting. Tom
I showed this around several members of my camera club: Winchester Photographic Society (UK) who were generally impressed. There was some concern as to whether a single lug was strong enough to take the weight of a pro camera plus a long lens and anothers thought the price a bit high, perhaps because of the $/£ exchange rate. Personally I think it is an excellent product as it avoids my Canon 40D bouncing on my stomach and activating some of the buttons along the bottom.Your service was impressive - it arrived here in the UK in 4 days.
Thanks David. Here is some background information with regard to the attachment point:
During the development of the BosStrap, more than 60 pounds were suspended from one camera strap lug to determine it’s capabilities under high loads. Sixty pound was chosen because it is about 10 times the weight of a professional camera with 70-200 mm f/2.8 lens. No failures occurred.
I consulted with experienced (over 30 years) repair technicians as to failure modes of the lugs they have seen. They never experienced a failure (actual separation of the strap lug from the camera body), but, very rarely, the post type lug developed some rotational play due to excessive torque imposed through the triangular split rings. The flexible BosTail serves in part to completely eliminate any possibility of torque loads on the camera strap lug.
In addition, camera manufacturers provided the following information with regard to other methods used to attach a camera strap:
User Question: “Hello, I recently purchased a shoulder strap for my [pro camera]. It is the type which can have a 1/4-20 stainless screw attached to it which can thread into the 1/4-20 thread on the bottom of the camera. My concern is not with the supplied stainless steel screw, but the solidness of the thread insert in the camera itself, which I believe was primarily designed to hold a camera, right side up, on top of a tripod. Is the tripod socket solid enough and secure enough inside the camera body so that it won't pull out when the camera (and lens /70-200mm) is hanging upside down at my hip as I walk around with it. Is there a maximum pull load rating on the screw insert? Or, could you confirm that it is more than solid enough to handle all your pro DSLR's (hanging upside down with a 70-200mm lens) Thank you in advance for all your help. Sincerely, SM”
Manufacturer’s answer: “Thank you for your inquiry. We value you as a [brand] customer and appreciate the opportunity to assist you. With regards to this accessory there is no guarantee from [manufacturer] that it will properly hold the camera in the position you mention.
Your notions regarding the 1/4"-20 thread on the bottom are correct, this is for connection to a tripod for holding the camera right side up. In this regard it is very strong and should have no problem holding the camera. There is no published maximum load for this mount though and for this reason I can't guarantee the cameras safety when mounted with such a heavy lens being held down on your hip. The mount wasn't really designed for this and damage may occur if this were to fall in this position. We apologize for any inconvenience that this may cause you at this time.
I hope this information is helpful to you. Please let us know if we can be of any further assistance. Thank you for choosing [brand].”
Another manufacture offered the following:
“The camera tripod mount is designed to support the weight of the camera and lens but is not designed for potential shocks that this sort of strap may impart on it. In normal usage of this sort of strap (sliding the camera up or down) it should be fine but we would not recommend swinging or dropping the camera and having the strap catch it. We don't publish any particular test data, though.”
Congratulations, Tom!
ReplyDeleteI showed this around several members of my camera club: Winchester Photographic Society (UK) who were generally impressed. There was some concern as to whether a single lug was strong enough to take the weight of a pro camera plus a long lens and anothers thought the price a bit high, perhaps because of the $/£ exchange rate.
ReplyDeletePersonally I think it is an excellent product as it avoids my Canon 40D bouncing on my stomach and activating some of the buttons along the bottom.Your service was impressive - it arrived here in the UK in 4 days.
Thanks David. Here is some background information with regard to the attachment point:
ReplyDeleteDuring the development of the BosStrap, more than 60 pounds were suspended from one camera strap lug to determine it’s capabilities under high loads. Sixty pound was chosen because it is about 10 times the weight of a professional camera with 70-200 mm f/2.8 lens. No failures occurred.
I consulted with experienced (over 30 years) repair technicians as to failure modes of the lugs they have seen. They never experienced a failure (actual separation of the strap lug from the camera body), but, very rarely, the post type lug developed some rotational play due to excessive torque imposed through the triangular split rings. The flexible BosTail serves in part to completely eliminate any possibility of torque loads on the camera strap lug.
In addition, camera manufacturers provided the following information with regard to other methods used to attach a camera strap:
User Question:
“Hello, I recently purchased a shoulder strap for my [pro camera].
It is the type which can have a 1/4-20 stainless screw attached to it
which can thread into the 1/4-20 thread on the bottom of the camera. My concern is not with the supplied stainless steel screw, but the solidness of the thread insert in the camera itself, which I believe was primarily designed to hold a
camera, right side up, on top of a tripod. Is the tripod socket solid
enough and secure enough inside the camera body so that it won't pull
out when the camera (and lens /70-200mm) is hanging upside down at my hip
as I walk around with it. Is there a maximum pull load rating on the
screw insert? Or, could you confirm that it is more than solid enough
to handle all your pro DSLR's (hanging upside down with a 70-200mm lens)
Thank you in advance for all your help. Sincerely, SM”
Manufacturer’s answer:
“Thank you for your inquiry. We value you as a [brand] customer and
appreciate the opportunity to assist you. With regards to this
accessory there is no guarantee from [manufacturer] that it will properly hold
the camera in the position you mention.
Your notions regarding the 1/4"-20 thread on the bottom are correct,
this is for connection to a tripod for holding the camera right side up.
In this regard it is very strong and should have no problem holding the
camera. There is no published maximum load for this mount though and
for this reason I can't guarantee the cameras safety when mounted with
such a heavy lens being held down on your hip. The mount wasn't really
designed for this and damage may occur if this were to fall in this
position. We apologize for any inconvenience that this may cause you at
this time.
I hope this information is helpful to you. Please let us know if we can be of any further assistance.
Thank you for choosing [brand].”
Another manufacture offered the following:
“The camera tripod mount is designed to support the weight of the camera and lens but is not designed for potential shocks that this sort of strap may impart on it. In normal usage of this sort of strap (sliding the camera up or down) it should be fine but we would not recommend swinging or dropping the camera and having the strap catch it. We don't publish any particular test data, though.”