Pig Iron Pro ND1000 10 Stop Neutral Density Filter (37mm)

ND filters can be very expensive considering you may only use one a few times a year. This one is good value

Not being inclined to drop a couple of hundred quid on a Lee slot in system without having had a chance to check out ND filtering, £15 seemed a decent price to experiment.I am, if not blown away, at least mightily impressed with this little thing. I can't comment on its durability (yet), but as a 10-stopper this is terrific and perfect for the Canon 16-35mm lens. No colour cast *at all*, and minimal vignetting in low light.Downside: being screw-on it can be a bit of a faff, but nothing forward planning shouldn't be able to deal with. Also it seems to attract dust easily.But really, very good value for money,

As good as any expensive filters, no noticeable colour shift - although I usually auto white balance in post regardless of whether I've used a filter or not. So don't bother spending any more than you need. Just buy this.

A very slight colour cast on long exposures, but at this price, I can definitely live with that. In fact, I actually quite like it as colours seem deeper and bolder. If you want the totally natural look, it's easily fixable in post if you shoot RAW anyway. Seems good for the money if you don't want to spend the outrageous amounts more established filter companies charge.

Better than expected. It produced a good timelapse video in bright sunshine without the horrendous colour shift I was predicting.

fitted perfect

I like it.

I wasn’t expecting miracles for the price but it turned out way better than expected. The filter was cheaper than a 58mm Lee 100 adapter ringAnd it turns out that I actually find the Pig Iron filter has a lot less colour cast than my Lee big stopper. Win win in my opinion. I wish they did a polariser