7D Vari/Fader ND for the Tokina 11-16mm ??

i dont know if they make a larger one than 77mm but if you can get an 82mm one with a step up ring to cut down on vignetting.
 
..hmm..after looking at the LightCraft site, it looks like the 77mm has a bulit in 82mm step up ring ....nice

So it looks like this might work for the super wide Tokina & 7D ...
 
Can I just point out that with a rectilinear ultra wide such as the 11-16 the focal markings on that lens are 1 ft (close focus) thru 7 ft then infinity.
So most of the time you will be shooting with everything in focus. It is a lens designed for ultra wide shots, not for medium close ups or close ups that utilize depth of field.
Therefore why not save money and stop down with the aperture?

The time and place to use ND's is at normal to long focal lengths. You would use the ND instead of the aperture to cut down light.
With these combinations you can manipulate depth of field to your taste.

Sure buy 77mm ND's they are very useful, but not for the 11-16, get 'em because you are using canon L zooms like the 17-55 or the 24-105.
 
Using a fader or variable ND on a superwide lens is a bad idea. It just doesn't work. Variable ND filters are made of polarizers, and the polarizing effect causes weirdness in the skies. You'll have skies that are bright on the edges but dark in the middle, or the opposite.

Variable ND filters are not for use on wide-angle lenses, period.
 
What's the best choice (maintaining best quality while keeping cost low) if you want a Variable ND filter for the 24-70 (77mm) and the 70-200 (67mm)? A 67 and a 77? The 77 and a 67 to 77 step-up ring?

Is it necessary to remove a protective UV haze filter before attaching the ND filter?
 
I have 77mm ND's and then get different step up rings for each zoom.

For my nikon primes I have 62mm ND's and steup rings.

I only use UV filters on the outside to protect everything.
 
Barry_Green said:
Using a fader or variable ND on a superwide lens is a bad idea. It just doesn't work. Variable ND filters are made of polarizers, and the polarizing effect causes weirdness in the skies. You'll have skies that are bright on the edges but dark in the middle, or the opposite.

Variable ND filters are not for use on wide-angle lenses, period.
Click to expand...

Not sure about that , when i did a test with my 11-16 and Vari ND the skies looked fine ..but that might be cos i was filming in the shade i was really happy with the look very sharp and in focus with very nice DOF

http://vimeo.com/10087789
 
Go outside, pan around. You should see bands of darkening and lightening moving across the sky as you pan it.

Polarizers have varying effectiveness depending on what angle to the sun they are. At 90 degrees to the sun they darken the sky the most, at 180 or 0 degrees they don't darken the sky at all. So if you have a very wide-angle lens, it'll be seeing such a wide swath of sky that the varying polarizing effect will be noticeable.
 
Barry_Green said:
Variable ND filters are not for use on wide-angle lenses, period.
Click to expand...

Can you suggest an actual focal length for 'wide'? im considering a vari ND purchase for my 28mm 1.8 and 85mm 1.8 (same size filter).

The 28mm on a 7D is actually closer to 35mm, so thats not really 'wide'. am I right? or am I right?
 
Jaydigges- I have used a Fader ND on a 28mm 2.8 Nikkor many times and not noticed any issues. My camera has a 2x crop factor so not too different from your's. I would say any time you use a Fader, you should pay attention to see if any weirdness is happening. It's a linear and a circular polarizer sandwiched together, so there's always the chance for some color shifting or other issues. But despite that, I haven't experienced anything out of the ordinary.
 
It depends on the total field of view. 28mm on a GH1 isn't the same as 28mm on a 5D; on the 5D it might exhibit the issue, on the GH1 it wouldn't. It all depends on just how wide the field of view of the sky is.
 
sorry if its a stupid question & bit of a tangent to the thread but can you also use the fader nd like a normal polarizer? - I've got a linear polarizer for my hmc151, was told you need circular for stills cameras - is that only for auto focus to work?
 
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