[77 mm] I have mainly been using the filter to soften the portraits I take because I print straight from the memory card without using computer touch-up. I'm extremely pleased with the softening filter effects. I do make adjustments in my camera to work with the filter as in the sharpness and the coloring to suit my taste for the end results that I'm looking for in the particular portrait that I'm shooting. The results of the filter are very minor but to me that is the way it should be - just enough to take a second look at the photo without realizing why you took a second look.... The camera lens had problems AFing, the photos looked blurry more than not. I tried hard to make it work for me but NO GO.Also it is hard to find much info and samples of the filter's performance on the internet.I still plan to experiment further with the filter on other photo ops besides portraits. But I would recommend this to anyone who enjoys the challenge of producing their end results from the camera and not the computer.Thanks for reading this; I hope it is helpful.Mary Grace@

[0.2 lb] This Gold Diffusion FX 1/4 is a very nice filter to take the edge off digital. A golden glow is added with no or very little halation and I use it at outdoor parties and blond portraits.

[0.2 lb] I bought this filter for HDSLR video use. The 1/2 grade provides a very subtle diffusion effect with minimal contrast loss. Ultimately, it takes the edge off of HDSLR video and provides a very close alternative to that elusive film look.

[77 mm] I am a fine atr / abstract photographer. I use this Warm Black Diffusion filter for still life, portrait, landscape and even shots of buildings and vehicles . The color tones of my subjects are very soft...also have an almost ebony hue to them. I seldom use Photoshop...I still love using lense filters. What's not so great? I cannot think of anything right now.

[77 mm] I love these filters, and I have the FX2 on all of my lenses for wedding videography. I like how it softens faces and reduces fine textures without adding any halation or losing contrast. My only gripe would be the artifacts in the filter are pretty noticeable in the bokeh or when the lens flares, but that's easy enough to work around.

[77 mm] If you're looking at this filter you likely already know what it is for, and sure enough it does exactly what Tiffen say. Optical resolution drops down but contrast loss and halation are kept to an absolute minimum. Strangely, if you look at Tiffen's triangle of diffusion diagram you'll see they put this filter halfway between resolution reduction and halation, implying you will get some soft highlight spreading. You absolutely do not and I don't know why that particular diagram suggests it when all their text and videos say it doesn't cause halation and, as I said, in use it certainly does not.
Allegedly on wide-angle shots or when using very small apertures you may see the black dots in the image. I can't say I've noticed this myself, but I only use this for shoulder-up shots, typically 50mm, often at fairly wide apertures, so I'm not in that 'danger zone'. If you want to shot wide and stopped down, maybe take caution and check out the Digital Diffusion/FX instead, which is meant to cause the same resolution drop without the black dots getting in the way.

I've had some limited experience with some Tiffen filters having poorly-cut threads, but otherwise the construction quality has been fine. Can't guarantee you'll get a faultless one but the fault rate, in my experience, has at least been very low – about one out of twenty filters having an issue, and even then, not one severe enough to stop the filter from mounting and functioning.

[77 mm] The golden glow this filter adds is beautiful! Magnificent on sunny days and blonde or fair skinned subjects!

[0.2 lb] I got this to reduce the jaggies in video on my 6d. It does not totally eliminate them, but it definitely improves them. I haven't yet used this for portraits, but that's in the cards. when I started using this, I got the general veiling that you expect from one of the mist filters. I was disappointed. However, then I cleaned the filter thoroughly. Much much better. I think this is going to work out nicely. I bought another one for a different lens. When I pulled it from the package, it was pretty dirty, too. So my advice is to thoroughly clean your filters. You'll be amazed.