Alpha Backpack 25L for Nature Photography Waterproof Camera Bag with 15.6 inch Laptop Compartment Tripod Holder Raincover - Backpack 25L Star Wander 01(Grey)

I've gone through 3 camera bags so far.
My Canon R10 is my 1st mirrorless camera and since I've been purchasing more lenses amd accessories, my previous bags were not able to handle it all.
This hardshell backpack with sturdy frame protects your valuable camera and equipment with room to spare.
The side openings make it very convenient to grab the camera while out amd about.
All the zippers are more weather sealed vs conventional ones and have safety snaps to prevent unauthorized opening of the bag when it's on your back.
Many storage pockets to store many accessories too.
The designer really thought this design out; really was designed with a photographer/ videographer in mind.
Highly recommend this great product!

This bag is just the right size and fits under any commercial airline seat ( I will NEVER check my camera equipment, ever.), at first it didn't look like I was going to keep it as I had trouble getting everything to fit. But after reconfiguring the dividers a half million times I finally got everything to fit, camera, 4 lenses, battery charger, extra batteries, card reader, flash, extra memory cards, filters, various other accessories and my 15" laptop, everything I had in my old bag and then some!

There are many little pocket and storage areas, the top (where I keep the camera and attached lens) has an expandable zippered section built in. all the zippers are nicely sealed for treks during a rainy day and does an excellent job of keeping the equipment dry and safe.

Bottom line: Best compact bag I have ever owned! Looks to be well built and has already been on many trips and is holding up perfectly, it's next trip will be to Italy in a few months.

Nice bag, would be a little better if it was slightly bigger though. Overall really good.

The structural integrity is very nice, I love the dual security straps what's nice about this bag is for the size it packs and still pretty decently compact as well considering. I was able to put a 70 to 200 and a 200 to 600 Sony GM lens in the bag!

The K&F concepts backpack design is what sold me on this. I love the detachable shoulder straps and the side openings. It's well made and the materials seem very sturdy and strong. I looks like it's actually fairly water resistant. The design is awesome! My problem with it is the size.

This one is listed as being 25 liters in size and expandable. I'm trying to replace an old 13 liter LowePro with something a little larger. I thought 25 liters might be overkill but gave it a try. When I place the two side by side this is actually smaller than my old one! The internal space for camera and lens storage is smaller but a little deeper which doesn't actually help. I have a Canon R50 which is small for my hands so I have a grip attached to it. Trying to find a way to configure the internal dividers just to get a camera and a couple of lenses in there has been a puzzle I haven't been able to figure out. There is just no way to use the space well and get lenses in. How does it calculate to 25 liters? Maximum outside dimensions?

I often keep a 55-210 mm lens on the camera body which in comparison to other kinds of lenses is small but between the lens and the grip there is just no simple way to configure the inside dividers and still have easy access to my other lens. Since I carry a small battery charger, small LED light and other accessories which don't lend themselves to the side pockets the top ends up being a messy dump bin. I'm still trying to work out the backpack because I like it and want it to work but I'm thinking more with each idea that I may have to return it.

Edit:
The question about sizes seems to be the way my LowePro bag from 2009 was measured and advertised vs the way sizes seem to be calculated. When I measured the 13 liter pack and did the math the interior storage space measures out to just about the 13. I used the measurements from the description of this bag and a tape measure I finally understood the 25 liters is based on the maximum outside dimensions and has nothing to do with the amount of usable space inside the backpack. I'm not saying it's false in any way, just a different standard of doing things. It's a great bag and the concept seems wonderful. Saying it's a large capacity bag depends entirely on what it's compared to and the expectations of the customer. The standards used to measure bags now seem to be oriented towards travelers and the restrictions on carry-on bags rather than oriented on a day trip hiker who is not going to be lugging a laptop around. I need to readjust my thinking and be more aware that thinking has changed concerning the target buyer.

Finally i can carry a R6MK2 + RF 15-35mm f/2.8L IS USM + RF 24-70mm f/2.8L IS USM + RF 70-200mm f/2.8L IS USM and accessories.

I've needed a new camera backpack for some time. So I decided to order four different bags (three from K&F and one from Mosiso) to try out, the idea being that I would keep the best one. This bag...is the one that I kept. This is also the most expensive of the four (you get what you pay for)...but I was able to get a good sale price on it.

For starters, this bag is very...VERY well made. It put the other three bags that I tested to shame. It's solid, holds it's own shape and is very well padded. Your gear will be safe in here.

There are flexibility features all over this bag. The divider between the top and bottom sections can be manipulated up or down...or partially up or down. I am able to push part of the divider up, which allows me to fit my Sony a1 camera mirrorless body with a 300 2.8 + 2x converter attached! That's not a small feat! Most of these bags are made for street photographers. I am a wildlife photographer so I use long lenses. The versatility of that divider panel is astounding! Well done K&F!!!!

The top compartment expands upward for more space if needed. It's a great feature, but it does add two extra zippers to that top opening so you have to push them out of the way when not in use. First-world problems, I know.

There is a luggage strap across the back which is a MUST for me, as I travel with my gear a lot. Because this strap runs vertically on the bag, you place the bag sideways on top of your suitcase. Smartly, K&F added a grab strap on the side of the backpack to make this easy to do.

This bag opens on both sides. The side "doors" that open are padded and each one includes a zippered inner storage area. So anything that you put in those "side doors" won't rub up against your camera gear. Brilliant!

They say that this bag is water proof. I don't know about that but it sure seems like it would be. Included is a full-bag rain cover just in case.

This bag is small. I'll say it again. This bag...is small. But it's very well thought out, and maybe has a few features that it doesn't even need ( like tabs that snap over the zipper to prevent theft). I guess this might be great if you are tromping around on the streets of Europe, but as a wildlife photographer, I'm not expecting bears and moose to come and steal my stuff, so I'll likely just cut those off. They are an extra step in entering the bag that I don't need.

There is plenty of room for a laptop if you carry one (which I don't). That space can be used for a variety of things.

About the only thing I would add to this bag is maybe a flat compartment on the inside of the front lower opening. There is a bit of wasted space there as it is now.

I guess worth mentioning also is that at least on my bag, the zippers are working very well.

If you are one who doesn't need to haul everything you own plus the kitchen sink, I can't imagine that you will find a better bag for the money than this one.

UPDATE:

I just took this bag on a trip that required air travel. I fell in love with it even more. It fit under the seats on all four of my planes and I was able to carry everything that I needed in it (as far as tech gear goes). Once at our destination, I left some of my tech gear at the motel (camera battery chargers, etc) which left room in the bag to carry a water bottle (inside the bag), my lunch and and an extra jacket while out on hikes. So this bag doubled as an air travel camera bag, and a hiking backpack. Even fully loaded, the bag was very comfortable to wear. I have a bad back and I barely felt the bag on my body. The bag has proven to be very sturdy and well made and I think it will last for quite some time. It is my favorite travel backpack...a true ten-star travel companion.

I have a bigger one but i bought this one for a trip to Italy last month and I took 5 airplanes without a problem with the airlines.

Wow! The name "Alpha" really suits this backpack well when it comes to functionality and amount of backpack technology(?!) went into this thing.

Pros
-Front access, side access, large compartment for 2 sleeves of tablet/laptop.
-High quality zippers that would block out water and moisture really well by the look and design of it.
-Removable shoulder straps for mini-duffel mode
-Body of the backpack is rigid enough to be called a structure, which would protect the gears well from impact.
-1.5L Expandability with top lid
-Stretchy side pouches for tripod/water bottles
-Magnetic hidden pouch for quick storage and placed in the back center strap, which is also for mounting on carry-on handle
-The quality of the exterior/interior fabrics and construction is really impressive... and I mean REALLLY IMPRESSIIVEEEE!! They even feel good to touch.
-Too many to list. I mean it literally and sincerely.

There are myriads of features in this backpack that would easily make you love it. It's also amazing how many good ideas they were able to pack into this small backpack.

Cons...
- Uncomfortable (at least in my case)
The top end of each shoulder strap is attached to the backpack via a huge metal harness. It is the harness that allows you to press/click to remove the shoulder straps off from the backpack body. This way, the backpack goes into somewhat of handheld mini-duffel bag mode mentioned above. This harness is really cool but can cause major comfortability issue depending on your body type.

I normally like to keep the straps short to have the backside of the backpack directly on my back, like a hiking bag. When I set it up this way, the harness pokes into my scapula constantly. It's extremely uncomfortable for me. I tried various strap settings. It's the harness that causes the backpack to be hanging a little awkward on my back all the time. It feels a little bit better to keep the shoulder straps long. However, I would not call this long strap setting "comfortable" either compared to other backpacks in the market.
- Internal space seems really tight for 25L. I have Lowepro Protactic 300 AW ii(20L), 450 (25L) and Manfrotto Offroad stunt (about 17L). Alpha is more comparable to Offroad stunt in terms of internal space. Maybe compete with Protactic 300 if I really shoved stuff in with the top expansion.

Again, this backpack can be super amazing if it fits your body type. I really love all the bells and whistles features in this backpack but unfortunately the straps do not work for me :( I really wish they make V2 of this backpack with the metal harness changed. I would definitely consider buying. Otherwise, I would highly recommend people to try this backpack though. In terms of features, you definitely won't be disappointed!

The backpack is great. It's not particularly cheap, of course, but it has several advantages over others. I actually wanted a backpack with a back opening that wasn't too big, as that's my daily travel companion. Unfortunately, I couldn't find anything suitable, so I ordered this backpack. I only take one camera and 1-3 lenses with me. I also wanted an additional compartment for small items and my wallet.

+ It's sturdy without being bulky. The material is very robust and stiff. It can even withstand being used as a pillow.
+ The straps at the top are flexible, making it very comfortable to wear.
+ It has a lot of padding and small pockets—you could almost say too many :-) The side pockets have additional zippers on the inside, so you can't reach them directly when opening them.
+ The top compartment can be expanded slightly upwards. It's perfectly large for storing small items like a wallet, tissues, keys, or even small snacks. The zippers can be secured with an additional buckle and are also sturdy. This prevents the compartment from opening easily and offers more security.
+ The same security applies to the front compartment. It is secured with two straps, which, however, can be easily released, but make it difficult to open "in passing."
+ The interior layout for cameras, etc., can be flexibly adjusted and is perfectly adequate for the amateur photographer.
+ The laptop compartment is double-padded. I don't really need it, but it's worth mentioning.
+ The bottle compartments on the side are also very sturdy; none of the bottles (0.75l) have fallen out yet (unlike my previous model, where that happened almost every time I put it down).

- Unfortunately, they open from the front and not from the back. That would be the final detail that would make the backpack perfect.
- I guess all the padding makes the backpack a bit heavier than others, but this is acceptable.

Despite the higher price, I highly recommend this backpack, especially if you're looking for something sturdy!