I am new to photography and I humbly seek your advice.
1) I just called up a local store and found out that there is a nation-wide shortage of 67mm filters.
Where can I buy cheap and good filters online?
2) Should I get a CPL or a PL?
3) As for ND filter, if I were to buy only one, should I buy the ND2 / 4 / 8?
4) Likewise for graduated ND filter.