Filter advice for Sigma 10-20

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Looking at Cokin square filters and some say the P range is suitable, some say it isn't.
Are Cokin good, or should I look at other makes?
Please can I have recommendations for this lens and if possible, photos to back up if it works or not?
They seem a cheap way of getting into filters. Lens will be both Sigma 10-20 and Canon 18 - 135 on a 40D, if it makes any difference.
Thanks guys
 
I have run Cokin P series on my 10-20. What I would say is that you may well get some vignetting due due to the EWA of the lens, and if you're using ND grads, mine have put a purple tint on the clouds, but not all the time, so it must be down to certain conditions.

Steve

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I'll second Steve's comments about vignetting using the P Series filters on the Sigma 10-20, but I've never experienced the purple tints. P Series works fine on 18-35.

I'm considering going down the Cokin X/Z Pro series or maybe's the Lee filters route.
 
I'd recommend the Lee Foundation kit and 77mm Wide angle adaptor.

I don't get any vignette at 10mm on my 10-22. I feel a kit that vignettes at my widest focal length would be a waste of cash, either from the filter or lens point of view. It would be different if I already owned the filters before I got the wide angle - then I might just live with it, but wouldn't go and buy something that automatically reduces the functionality of another piece of equipment.


Andy
 
Which 10-20 do you have? If the 77mm, it seems fine with P-Filters held in the wide-angle holder. The 3-filter regular holder will lead to vignetting.

The 82mm seems to be more prone to vignetting at 10mm from what I've heard.
 
The P series should work fine on the 10-20 to about as wide as 14-15mm or so. Any wider than that, and it's not really vignetting that'll be the problem, but the fact that you will actually see the holder in your shot.

Colour tints are generally down to lots of ND and long exposures (it's near-infra-red that's causing the tint) and I get them even with my B+W 10-stop on long exposures.

I went down to the local camera store and paid for a Z-Pro holder a couple of weeks ago for some Schneider 4"x5.65" glass ND filters I recently got, but it hasn't come in yet. :(

I would go with 100mm filters and appropriate holder (Lee's probably the better holder, although pricey, but Cokin will work too) if you want to shoot at 10mm.
 
If you can, get the single filter holder for the P-series. If you can't, get a cheap knock-off holder and cut back the arms until it will only take a single filter. This will give you an extra mm or two on the wide end before vignetting becomes a problem.
 
As Alastair said, but you will be limited to one filter at a time. I didn't get vignetting with the cookin wide P-holders with my then sigma 10-20. If ever I'm going to buy filters again, I'd look at Lee based on good things I've read about it.
 
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Alastair said:
If you can't, get a cheap knock-off holder and cut back the arms until it will only take a single filter.
Click to expand...

It doesn't even need to be a knock-off. Even the official Cokin P are cheap enough to mutilate if you can't find the "wide angle" Cokin P holder.

Good tip tho if you only need a single filter. :)
 
It is the cheaper 10-20, the 77mm.
Looks like the P may work then.
 
jmsjabb said:
It is the cheaper 10-20, the 77mm.
Click to expand...
In the case of Sigma 10-20mm lenses, you don't get what you pay for. The cheaper f/4-5.6 lens is vastly superior to the more expensive f/3.5 lens.

So, you got the good one. :)

Cokin P is a good, relatively inexpensive, option, but you may find yourself upgrading to a larger filter format at some point. It's taken me 2 years to get to the point where I really want to shoot at 10mm on mine and lose the vignettign issues, and I've gotten plenty of use out of the P system (and will continue to do so), but it's nice to now be able to fully utilise the focal range of the lens, and do more with it.
 
Kaouthia said:
In the case of Sigma 10-20mm lenses, you don't get what you pay for. The cheaper f/4-5.6 lens is vastly superior to the more expensive f/3.5 lens.

So, you got the good one. :)
Click to expand...



:thumbs:
 
If you want a cheap holder, your local Jessops may have one that you can butcher for a fiver.
 
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