If you don't know what one is or what it can do, read on.
As well as the motion blur, there are other advantages too, but consider these two:
- if the exposure is long enough and people are moving, scenes can look entirely free of people as they blur to nothing so you can get 'people free' scenes which you might otherwise have to wait hours for before you get a lucky few seconds when there are no people in the frame.
- if the people in the picture are blurred and so not recognisable, you don't need a model release to use the picture commercially. Since getting a whole High Street to sign a model release is an impossibility, this little bonus is fantastic.
Second, there are filters that are a fixed number of stops, but I prefer the variable sort because they are so useful, like a zoom versus a prime. The one below featured on Amazon currently retails at £20.99 and can cut light between 2 and a bonkers 2,000 f-stops.
Polaroid 77mm filter on Amazon
It sort of goes without saying of course that you'll need to be using these on a tripod to avoid camera shake at longer exposures.
Happy Christmas everyone.