Tiffen makes great filters
927974
I love Tiffen filters. I find them to be every bit as good as the other high end filters and their prices are reasonable
168444
Impressed by the prompt delivery and a good value for the price. I have used Tiffen optics in the past, I have found them to be very good.
3625566
I have finally had a chance to test this Tiffen 77mm Variable Neutral Density Filter.

1) This filter is able to use 77mm lens caps on the inner ring to protect the glass from damage. You do not need to purchase another cap to cover the external diameter. However you cannot attach any other filter in front of it. But you still can behind the filter.
2) I have tested this filter in a constant lighting room and was able to get 5 to 7 stops of light fall off . This is fantastic as you do not need to carry multiple filters or a lens filter system. For the convenience of space and weight this is ideal for travel photographers. The box claims 2-8 stops (ND 0.6-2.4) of light drop off. My Cokin system has a set of 3 ND filters of 0.3-0.9. I tended to use the 0.6-(0.9+0.6) range so this Tiffen filter still has a better dynamic range.
3) Once you start towards darkening the filter towards the extreme there are some things to consider. a) The color shifts towards magenta at darkest extremes. I noticed this only at the 6-7 stop extreme of darkening. b) When you start to darken to 4 stops you start to get vignetting, and at 5 stops you start to see the bend of an X starting to cross the frame. I tested this vignetting on a APS-C camera sensor with a Tokina 11-16 lens at 13mm. The manual claims that this is a limiting factor while using 2 separate polarization filters on top.
4) When you keep the same density constant, but physically rotate the filter, color will change from yellow to blue. I am guessing these are the 2 polarization's that Tiffen used for the extreme colors to meet evening while in use. Thus I suggest that you properly tighten the filter to be the most even color before you take any pictures or video. Or if you change your camera from landscape to portrait, be aware this could shift the color. I mostly notice this color shift off reflective surfaces.

I personally can find the following uses for this filter:
1) You are now able to reduce your flash sync speed to a level you can now use your flash under the 1/200 or so speed outdoors
2) Able to use shallow depth of field apertures outdoors.
3) To use slower shutter speeds for silky motion of clouds and water.
4) For video work, you can now use the ideal frame rate speed.

I am overall giving this filter 4/5 with the intention of if you know exactly what type of density you need, then I would suggest getting a single filter, especially at such a darker density as the light will be more even for the exposure, and the color won't be distracting. Otherwise I find this filter a great bargain for having the ability to include such a large dynamic range of light for a single filter.
4588674
Tiffen always with good quality. I bought expensive brands and Tiffen difference is not noticeable.
2960056
Very happy with this filter.  Bought it for protection of my lens and you can tell its quality workmanship!
3409150
High quality glass filter for my Nikon lens. Colors really 'pop' and image quality is all there. Highly recommended filter!!!
4451894
Very good filter. Very clean with no visible deterioration of image quality. I got a great deal on mine and will be using this filter for a lot of my profession work.
3589858
I am a beginning photographer, and this set of three filters works amazing for me (especially the polarizer).  Now, I have not used expensive filters before, so I do not know how these work in comparison, but what I do know is that the set is definitely worth the money.  I have used the polarizer the most, and it has been very useful to photograph food items on very reflective tables.
3611561
Very good filter that protects your lens and does not add artifacts to your photos.
3721584
Warning:  I'm a very amateur photographer, so my opinion isn't as valuable as a more experienced individual!

Purchased for photos at the Grand Canyon, and I believe it allowed my camera (older Canon Rebel XTi) to brighten up the dark canyon (compared to the bright sky).  I found this filter easy to install and remove, as did my friend.  Never used a graduated filter before, so I had to remind myself to keep it oriented correctly after each install.  This is my second Tiffen filter, and I've been happy with both.
4608299
Review of the Tiffen 77mm ND 0.6 Filter

ND filters reduce the amount of light entering your camera's lens, slowing down your shutter speed and letting you blur backgrounds when shooting panning action shots. Instead I bought it in lieu of a polarizer to bring out the color in skies, because it has effects similar to polarizers with respect to fixing washed out skies, although it doesn't offer some of the other features polarizers offer.

Nevertheless, I brought this filter on my school trip to Spain for outside shooting (it takes away 2 stops of light so it's not recommended for indoor, night, or available light shooting) on my Sigma 10-20 and Canon 40D, and the pictures it produced are absolutely breathtaking. Sure, part of it was due to Spain's beautiful architecture, but the filter made the skies a deep blue and the buildings really stood out against the blue skies.

I haven't done a lot of action shooting since I bought the filter, especially not on a 10-20 lens, so I can't comment on what effect this lens has on blurring backgrounds in action shots, but for my own purchases I was extremely pleased I bought this filter.
4469884
I have never been disappointed with Tiffen filter kits. Great filters for a budget minded photographer or for anyone for that matter.
1205735
In my experience Tiffen makes a very good filter and this one is no exception. Threads match nicely and the filter seats firmly yet is easily removed. The rotation of the filter is buttery smooth and stays put. The Tiffen adds a nice degree of polarization that gives colors a bit more saturation and contrast with a minor loss of overall transmission. If you're not shooting with a polarizing filter you probably don't realize just how much stray/reflected light is affecting your photo's. Once you see the difference a good filter like this can make you'll wonder why you didn't start using one sooner. Put your UV filter back in the bag and put something in front of your lens that will actually improve every shot. I've spent bigger money on other brands of filter (Hoya, B&W, et al) and I just don't see that money buying me a better filter. Maybe I'm missing something but, "the proof of the pudding is in the eating" and Tiffen filters do the job for me without breaking my budget.
2740861
Nice good quality filter for lens protection. Works great!
2601198
These filters are great and reasonably priced.
4424502
I've been using this filter for nearly three years on my Nikon D70, and it has been fantastic. No scratches, super high quality with a nice weight to it, and the photos look fantastic. I liked this so much that I purchased a B+W Circular Polarizing Filter as well. At the price Amazon is selling these for, there is no excuse not to buy one.
51294
replaced th efilter that I broke on my wifes Nikon D40 and it works very well. Down here in the south a UV filter is a must.