QUOTE(mingyuyu @ Nov 15 2014, 12:29 AM)
Looks like I need to try out the CPL filter to see if I really need it.
For ND, is it worth to go for more stops and sacrifice image quality? In my opinion if you go for brighter ones, you need to stop down more to achieve the desired exposure which may cause diffraction sometimes; while if you go for darker ones, you stop down less but the filter might degrades more.
About the filter size, a 77mm is very expensive for me, since I will be mostly using on my m4/3 system (largest diameter I have currently is 62mm). I might get a 10-18 or other UWA for my M in future since m4/3 UWA is really expensive compared to APSC ones. I know 77mm is very versatile for adapting on various lenses but the price is quite high

When getting an ND filter, the more stops it can go, the more flexible.
How else you're going to get the smooth long shutter during daylight ?
A low stop wouldn't do much in this case.
I once made this mistake, I've first purchased a Hoya 77mm 3 stop filter.
It was barely useful. All it did was to bring my shutter below 1/200 at 5pm so my flashes could sync.
Who cares about quality when it is barely useful in the first place.
If you intend to stop down to seconds during the day. Get the 10 stop.
Oh, for micro 4/3, forget about the 77mm limitation then.
As for price, Black Friday is coming.
Expect discounted price. I bought a 32GB 800X CF card for USD 48 including international shipping. The same card cost RM 300 in Malaysia.
Nowadays I just use a variable ND filter.
For video. To reduce shutter speed to 1/(2*camera fps).
This post has been edited by LegendLee: Nov 15 2014, 02:20 AM