ok. i am convinced to invest
lee filters are square??
do i need to buy a separate holder?
will this holder work with all lens sizes?
what are the options for me to buy - looking for brand names
- lee filters
- Marumi - no good availability in UK
anything else to consider?
ALSO: what do i need? n2, n4... n400??
what should i start with?
I suggest you start with reading this :http://www.redbubble.com/people/peterh111/journal/4421304-the-ultimate-guide-to-neutral-density-filters
I found it to be very useful to learn about nd filters and which to buy.
A brand I would highly recommend is B+W I have their 10 stop and 6 stop filter because I like the really long exposures(a few minutes long on a bright summers day ).
That would be my go to for screw in filters.
If you also want to buy gradual nd's later, I think it is best to invest in a LEE set. But the waiting period for the 10 stop is easily a few months.
I hope this was useful to you.
That was an awesome article on ND filters.