I opted for this backpack with a view to carry my DSLR for shooting in all terrain bike rides. This backpack is almost ideal: its compactness, lightness and ease of use make it an excellent camera equipment transport bag. The bandoullières combined with chest and waist straps to keep acting perfectly properly stowed the bag in the back. (FYI, or similar goods, namely Slingshot and Fastpack have only one bandoullière or seem too wide to fit cyclists) Negatives include in turn: - In the small modular indoor enclosures do not fit perfectly to the shape of the equipment (case mounted a lens for example) - The 200 is a bit tight for large zoom (the 300 perhaps?) And the side pocket can not accommodate a small gourd. In fact it would lack a secure location for hydration for this specific use in mountain biking or hiking require another source of hydration. - The rain cover would be the ultimate.