Looking for UHH suggestions.
I need to add a ND filter kit to my bag of tricks. I'm looking specifically for a kit that includes adapters preferably one that is a universal fit (if one exists) but if not I'll start with 77mm lens adapter and add from there. I'm looking for a mix of value & quality but I've seen some over 1K +++, no thank you. I would consider dropping $250-300 maybe a little more on a kit. FYI I shoot Canon "L" not that it should make a difference.

Thank you and I look forward to your suggestions.

Looking for UHH suggestions.
I need to add a ND filter kit to my bag of tricks. I'm looking specifically for a kit that includes adapters preferably one that is a universal fit (if one exists) but if not I'll start with 77mm lens adapter and add from there. I'm looking for a mix of value & quality but I've seen some over 1K +++, no thank you. I would consider dropping $250-300 maybe a little more on a kit. FYI I shoot Canon "L" not that it should make a difference.

Thank you and I look forward to your suggestions.

I know you don't want to spend a fortune, but if you buy something that lacks quality and doesn't deliver, even if it is only $300, you have just added $300 to the cost of one that will work for you.

I don't care for graduated ND filters - I rarely come across situations where there is a clear straight line horizon where I would want to darken part of the composition. There are trees, mountains, buildings, rocks etc that jut into the area I am attempting to darken and these intrusions will have to be addressed in post processing.

That being said, if I were to buy a system I would likely end up with this:

http://www.winecountry.camera/

https://fstoppers.com/architecture/fstoppers-reviews-wine-country-camera-filters-best-class-256068

https://www.bhphotovideo.com/c/product/1397677-REG/wine_country_camera_100mstr77_100x100mm_master_5_filter_kit.html?ap=y&gclid=CjwKCAjwu5veBRBBEiwAFTqDwRk0ZHJMLHjR2xKFOKaaO9okxt5m1bzDGgpgOFZQkNTRreWDPpPt2hoCXA4QAvD_BwE&smp=y

At $1100 for a basic set of 4 Blackstone filters and the best holder in the business, it's not cheap. But it just oozes quality and precision. The other stuff is bush-league. No holder I've used or seen does a filter stack as well as this one.

A kit may sound like a good idea, but in the end you will probably end up only using a few of them. The best thing would be to figure out which ones you really want, and then buy good quality. You can always buy another one later, when you decide you need it. The most useful are the Graduated ND filters, and there are some interesting variations to consider. First there is how dark do you want to go - usually darker is better, because if you don't need darker, you can probably get a decent image straight out of the camera! Second, do you want one that starts dark at one end, and goes to clear at the other? Or do you want one that starts dark in the middle and goes to clear at both ends? Solid ND filters decrease the amount of light that enters the camera, but you could do that by changing exposure settings! More useful would be a circular polarizer, but you would need one for each different size of lens that you want to use it with.

Everyone has their brand preference, mine is B+H for the circular polarizer, and for the Grad ND I like Singh Ray Galen Rowell, which are rectangular. Like SPeters, I hand-hold them. Starting out, I also had holders and adapters, but they are just as easy to use and faster when hand-held. It takes a little practice, to make sure you are covering the whole lens, but allows you to switch from the filter for one image, and then immediately to shooting without it for another image. I think the only time the holder/adapter might be useful is if you want to stack filters, but even that can be done hand-held!

Unless you are doing high volume high precision work, $1,000 plus for a filter set could be throwing your money away. You need to first do a cost/benefit analysis and consider that Photoshop allows you to do almost the same thing as a graduated ND filter without the expense and little if any loss of image quality. If you really do need graduated ND filters on the camera and have a high budget, I would still start by trying a less expensive alternative. Buy or rent a single low end Cokin ($40 ea.), Lee ($120 - $150 ea.) and one or two other brands of 2x4" filters. Then I would test them under the same conditions on the same subject(s). It pays to test first. My rule is that the more it costs, the more it makes sense to test first if possible; even if it costs more to do so.

A kit may sound like a good idea, but in the end you will probably end up only using a few of them. The best thing would be to figure out which ones you really want, and then buy good quality. You can always buy another one later, when you decide you need it. The most useful are the Graduated ND filters, and there are some interesting variations to consider. First there is how dark do you want to go - usually darker is better, because if you don't need darker, you can probably get a decent image straight out of the camera! Second, do you want one that starts dark at one end, and goes to clear at the other? Or do you want one that starts dark in the middle and goes to clear at both ends? Solid ND filters decrease the amount of light that enters the camera, but you could do that by changing exposure settings! More useful would be a circular polarizer, but you would need one for each different size of lens that you want to use it with.

Everyone has their brand preference, mine is B+H for the circular polarizer, and for the Grad ND I like Singh Ray Galen Rowell, which are rectangular. Like SPeters, I hand-hold them. Starting out, I also had holders and adapters, but they are just as easy to use and faster when hand-held. It takes a little practice, to make sure you are covering the whole lens, but allows you to switch from the filter for one image, and then immediately to shooting without it for another image. I think the only time the holder/adapter might be useful is if you want to stack filters, but even that can be done hand-held!