[Zipper] Love this backpack! It is big enough to hold my Sony A7RIVA with my Sigma 24-70 mm lens and have enough room to hold another lens too. The camera bag can be taken out of the backpack if you only want a small camera bag. The backpack has plenty of space for items if you go on a hike with your camera equipment or you can take your camera bag out and use it solely for hiking (or anything else you need a backpack for). The sternum straps and waist belt are comfortable, and I like that it has a whistle built into the sternum strap for security. The back padding is nice and having the option to put up to a 3-liter hydration bladder is great. I am also able to fit my 15-inch laptop into the sleeve where a hydration bladder goes (if I'm not using my hydration bladder). It has a few pockets that are great and completely meets all of my needs to have my camera with me while hiking. Lowepro did a fantastic job of designing this backpack for taking pictures on the go.

[Yes] It is a nice size day pack when you don't want to haul around a lot of gear. Very versatile pack... can also use a optional water bladder like a Camelback etc. Lots of options for strap arrangement and camera carry.

[4.25 lb] I will not say what everyone else has said. It's a great bag, it's 24L total. The camera compartment included is the same as GearUp Creator Box L II which is nicer IMO. But the velcro of the bag door wouldn't connect to the Creator Box L II since the inside door material is nylon. It doesn't have a laptop compartment but it can hold a 13 in the water bladder compartment with a sleeve for extra protection. I would recommend using this with a mirrorless camera, it would have plenty of room for accessories. If used with a bigger DSLR, of course it will work but would take up room in the compartment. So far I love it and it's a great travel companion and very light.

[5.2 x 3 x 1.3"] This is a great bag for multi day backing trips. It really sits squarely between a traditional backpacking bag from something like Osprey and an outdoor camera bag. That’s something I’ve not seen in an other bag. The detachable “brain” top, the different compartments allowing for light/heavy/light packing, water bladder support, as well as the highly adjustable strap system are all features I would expect on high backpacking bags and are really hard to find on camera bags. I also have an Atlas pack that claims to play in this same space but just doesn’t have the features to be a true backing bag and is really just a nice day hike bag.

The camera space is appropriate for multi day trips where equipment is the priority. That said, I can get my whole GFX kit with three big lens so it can hold a good amount.
Once I got the strap system dialed in, it carried 35+ pounds really well.

For me, the only legitimate alternative to this bag is a “real” backpacking bag with a third party cube added in. The price on this bag is steep, but the alternative is just about as expensive.

[Zipper] I like to take my camera (EOS M50 with 22mm prime and 55-200mm tele lenses) with me mountain biking. I had been using larger active packs, which were too big for any real active movement.
I was just saying, I wish someone made a biking style hydration pack, but with that side access camera storage feature.
Then, pow!, I found this Photosport 15L.
I load mine with:


The aforementioned M50 + two lenses
One action cam (Campark v40)
One Insta 360 GO2
One drone + controller (DJI Mini SE)
One selfie stick/tripod
Extra batteries
Random rigging clamps and mounts
2L hydration bladder
And a pouch of various bike related items (shock pump, co2 cartridges, miltitool, etc...)
And there's still room for snacks!

[Yes] I have a few photo backpacks--the F-Stop Loka UL, the Vanguard Veo Active 46 and now the Lowepro PhotoSport 24L. Each fulfills a different function, though I have used all for hiking with different kit. The PhotoSport is by far the most comfortable to wear and its flexibility for carrying the camera is outstanding. It is a bit small in the camera compartment, but perfect for those times that you want to only carry one camera and a couple of lenses. It is my go to for day hiking with basic gear and a few extraneous essentials.

[Yes] I have a Lowepro pack that will hold a couple bodies plus assorted lenses and gear, but it is huge and cumbersome. I was looking for something I could use on day hikes and this is well-suited to my needs. I can put a Canon R5 with RF macro lens plus a couple extension tubes in the lower portion, a tripod on the side, and my flash unit, lunch, even lightweight rain jacket in the upper compartment. A water bottle can also go in the upper compartment, or I can put a hydration bladder in the provided pocket. This has been perfect for what I needed.

[Yes] Great backpack, feels like a good update from the PhotoSport AW II.
If you're on the edge between 24L and 15L, get the larger one. 24L is not that much larger but it certainly holds a mirrorless camera + 1-2 lenses (depending on the size). The 15L holds a very small camera. For example, Fujifilm XT3 is slightly too big for it. 24L is perfect. I was able to fit XT3 with a 10-24mm + a large 50-220 mm lens in the camera compartment. Solid choice, I personally love side camera access and front stretchy pocket with can definitely hold a vest, snacks, etc. The side pocket is well done and can hold a large Nalgene or a tripod.

[Green] Really pleased with this bag. It feat all my needs. I use it like a day pack. Also for traveling. It hold perfectly my MacBook Pro 14 in the water bladder pouch. In the camera compartment, I can bring with me my canon R5 with the rf 24-240 on it and my rf 14-35 f4. I tried to put my R5 with a rf 24-70 f2.8 on it and my rf 70-200 f2.8. It feat but barely. It’s not the best option For that kit. But if someone want to do it. It works. In the main compartment I have a small table tripod an my filter pouch. The quality of the bag is great. An the straps are very comfortable. Highly recommended.

[Green] This bag is perfect for me. In the camera carrier, it holds my Fuji XT3 with the 50-140 attached, with just enough room for one or two wider primes. The rest of the bag has plenty of room for my lunch, a jacket, water, and an extra body or other camera gear. It fits my back and shoulders well and is comfortable to wear. A bonus is the camera carrier is also removable which let's me shove it in other larger packs if I need more room. I had an older 2015 version of this same pack and I have to say this big upgrade. I really like it.