OVERVIEWI do a lot of traveling for photo and video shoots and wanted a backpack for my photography gear. Additionally, when I travel overseas I wanted something that could fit my full frame 5D4 and my Mavic Pro. On top of all of that it needed to be durable, comfortable, and weather resistant. The Lowepro ProTactic delivered all of this and more.WHATS IN THE BAGIn this single bag I am able to pack all of the following equipment. Even for it's size it is a little hard to zip close with the equipment, but if everything is perfectly arranged, the zippers do manage to close.Camera - 5D Mark 4 with battery grip and tripod plateCamera Strap - Fastfire strap fits next to cameraCamera Batteries - 4 extra camera batteriesMemory Cards - Extra CF & SD (Canon 5D4), and MicroSD cards (Mavic Pro)Laptop - Small dell 13" laptop so that I can backup the footage in the fieldTablet - iPad Mini tablet that I use to control the Mavic ProLenses - Canon 70-200 2.8 L (portraits, zoom, wildlife), Canon 24-70mm 2.8 L (events, portraits, landscape, low light venues, group portraits, weddings, video), Canon 16-35mm L (landscape, events), Canon 24-105mm L (landscapes, walkaround lens, video), Sigma ART 50mm (detail shots, occasional portraits)Drone - DJI Mavic Pro with 4 batteries, tablet holder, remoteND Filters - 2 stop, 4 stop, and 10 stop Hoya 77mm ND filtersBasically an entire mobile studio ready for anything from weddings to light video work to landscapes to portraits fits in this bag, not to mention the Mavic Pro for aerial photography and aerial video. Unfortunately the bag is so full at this point that all of the various chargers (laptop, Mavic, Canon), and associated wiring simply do not fit, but for a day trip this bag has it all. The other thing that does not fit is off camera flashes, but when shooting an event that needs flashes I'd bring a lot more equipment than this (diffusers, light stands, radio triggers, etc).PROSSpace - Of course the number one PRO is that this thing holds almost everything I want to put in it. I would love to be able to add a flash and small flash diffuser so that I'd be equipped for impromptu portraits with on camera fill flash, but I'd have to remove a lens or the Mavic Pro for a flash to fit.Build Quality - So far the build quality has impressed me, I still feel like i am putting too much gear in this bag since the zippers and seams are straining a bit, and I am a little concerned because I could not find a clear warranty statement on the LowePro site, but if the seams pop or the zippers break hopefully LowePro will provide warranty support.Size - for me the size is perfect. It's not quite big enough to need rollers, and it fits with ease into the overhead compartments on airplanes. I have noticed that when you have a backpack on your back at airports the airline attendants ignore you; the minute you are pulling a carry-on with wheels your chances of being allowed on the plane without checking your bag are about 50% even if it fits in the overhead.Customization - the movable panels inside the backpack allowed me to customize it to fit my needs. When I am traveling I will have it setup to store the Mavic and Canon, when I am local I will set it up to support two camera bodies and flashes for weddings and events.Usability - The top compartment access is perfect for a quick run and gun scenario, and my favorite part is that I get to keep my 70-200mm lens on the body.Appearance - I do not like flashy gaudy equipment that draws people's attention to my gear. This bag is not big or flashy and keeps logos to a minimum which is the way I like to keep it.Anti-Theft - Since the zippers are on the inside, if you are in a country or location where theft is a problem, this bag will keep your gear safe. I have seen some reviewers complain that a thief could use the top or side zippers to steal your gear. The solution is simple, if the location you are at is that bad, then simply ziptie those zippers closed. But come on people, if theft is really that bad, are you even going to bring this kind of gear? Personally I would bring the cheapest Rebel and kit lens I own.CONSWarranty Statement - I am having problems finding a clear warranty statement on the LowePro site, Amazon states the vendor has a limited lifetime warranty, but this is not apparent on the LowePro site.Zipper Placement - I knew before I bought this bag that the zippers were on the inside, so I am not going to take away a star for this, but it still takes some getting used to. I liked being able to hang my bag on my light stand and having access to the contents of the bag; with this bag I have to lay it on the ground to get to it through the rear.Rain Cover - I am not sure if this was supposed to come with the rain cover, I thought I read somewhere that the rain cover is included. I am going to contact the manufacturer to see if this was supposed to be included.CONCLUSIONThis bag is exactly what I was looking for, I only hope the zippers and seams last a long time because they are definitely stretched to their limits holding all of the gear. The bag is pretty comfortable to wear, I went up and down a pretty steep mountainside with no problems from this bag. This is the first camera bag that I have owned where the zippers are on the inside; that is taking some getting used to, but I guess one benefit to this is that if you sit it in dirt the dirt will not be all over your back when you put it back on your shoulders. The downsi