Re: Canon Announces Two New EF Ultra Wide-Angle Zoom Lenses and White EOS Rebel SL1 Digital SLR Came
Sabaki said:
I must say I just love, love the level of knowledge and the eagerness to share.
I'm a little confused about Lee filters though and was wondering if somebody could just educate me please?
1. The vignetting mentioned in earlier posts at longer focal lengths, is it software removable or is it the actual adaptors that enter the frame?
2. Would a current filter system work with a 12-24 or 14-24 or would a new system need to be developed, based on the dimensions of the front element?
3. Can a filter system be 'adapted up'? Say you purchase a 77mm system and your next lens has a 82mm thread, would a step up 82mm adaptor make the 77mm usable?
4. Kinda similar to question 3. So I can buy a 16-35ii now for a good price and I'll then invest in a Lee system. But if Lee had to create an unique system for the 12/14-24, does that mean having to buy a whole new filter system again?
1 = mechanical elements in the FOV. Not correctable through lens vignetting algorithms -- more like a clone tool fix, but I am a rookie with using these. Others may have slicker tricks.
2 = the kick in the butt. Apparently around 15mm (FF) focal length, most manufacturers give up on front-filterability and the Lee system will not work. So if you are using Lee (there are alternatives), their 100mm system is the one most of us use (for the 16-35 II, 24 primes, 17-40, many Zeiss wides, etc.) Well, apparently Lee thought the Nikon 14-24 was worth engineering a specialized workaround for, and they made the SW150 system
just for that lens: (
http://www.leefilters.com/index.php/camera/system-sw150). As I understand it, it's not as fully functional as the 100 system as it doesn't support something important.. was it a CPL? It's something non-trivial for landscape folks.
3 = as stated my someone else, you get adaptor rings for the lens' filter diameter. That's really the only added cost once you've invested into the system. $50-60 or so if memory serves.
4 = See #2. The Lee 100mm setup is for front-filtering lenses only. That generally means you are locked out of the fun on lenses with a wide end under 16mm or so (FF, I mean). You could hand-hold certain items in front of wider lenses, but depending on the FL, a 4"x6" (i.e. 100mm) filter may not be wide enough to cover the entire FOV. The next time you have a wide angle lens in your hands, look down over the top of it and imagine the comically wide V of the field-of-view, then imagine how big the flat things in front of it need to be when you get 15, 25, 35mm away from the front element. So a lot of really wide angle shooters (say, with the 16-35), have to thin up their Lee holder to only allow one creative tool instead of stacking two or three.
- A