« on: August 28, 2014, 11:19:57 AM »
Hi There, Im new to the Filter world and just wondering if you could help me.
I see your test and wonder why Im getting this issue on my shot, I've just used the big stopper and .9grad on some shots down the beach and even at 19mm and F8 on my 16-35 F4 ( 5diii ) i seem to have darker corners graduating into my shot. At 16 very bad, I have the wide angle adaptor and only the two filters in. Ive spoken to the Suppliers today and they say its the lens. but its brand new and doesn't do this in normal shots,
Thanks and I appreciate anyones feedback - is the F4 lens different to the 2.8 some how and can this effect it? am Doing something wrong?
That should not be happening. Since we have the same lens, the only things I can think of are:
- You might be shooting with a standard Lee ring and not a WA (wide angle) Lee ring. The WA rings tuck the entire apparatus closer to the lens to minimize the risk of vignetting. See this video for what I am talking about: https://www.youtube.com/watch?v=BVPVBR3CKRk -- I believe you have to have the WA ring for shooting wider than 24mm on a FF rig.
- You said you have two filters in, but that isn't what matters -- how many slots are in your holder? A three slot holder will vignette more than than a two slot holder, and so on. Think about it for a sec and it should make sense: the more something of width/diameter X gets pushed away from the front lens element, the more likely it will creep into the field of view.
- Do you already have a filter on your lens before you screw in your Lee ring? That will stack the thickness and you will see vignetting kick in 'sooner' as you go from long to wide on the focal length. In WA lenses, you really need to screw the ring on to the naked lens to avoid/minimize vignetting.
- Are you using the Lee system holder, or do you have another company's holder? Lee isn't the only one that works, but the data I gave was for their 'Foundation' holder from the 100mm system. Other holders may have slightly different thickness and location to the front element of the lens, which may affect your results.
That's the best I can think of.