I have posted testing of Sunnylife ND filter before and now I found some new flaw in this ND Filter.


Sunnylife ND filter on the right.




I was shooting out on snowy day and start noticing my image is getting fogged up.
It turns out that inside of the filter is actually getting fogged.



This is the image without Sunnylife ND filter.



This is the one with it on.
Quite hilarious this is happening and looks like this filter only has a coating outside but not the inside.

I have switched to Freewell ND Filter and had no problem.
If you get a filter, better to check it is coated on both side.

I guess cold air outside and warm gimbal head triggered the condition.
It was a really cheap filter so expected low quality but this was just hilarious.

Hi, thanks for sharing this amazing ND filter to us! Cheers!

I have the Sunnylife ones as well.  Why they put them in a tin is ridiculous.  I think I will be buying the Freewell ones soon.

Mr Sepo Posted at 2-20 15:37
I have the Sunnylife ones as well.  Why they put them in a tin is ridiculous.  I think I will be buying the Freewell ones soon.

The Freewell container isn’t any better I think. It’s hard to remove the lid and also hard to hold everything without having to set things down. PolarPro’s seems to be the easiest one to use so far.

Very nice, thanks for sharing

Mr Sepo Posted at 2-20 15:37
I have the Sunnylife ones as well.  Why they put them in a tin is ridiculous.  I think I will be buying the Freewell ones soon.

Pgytech seems to have a very convenient one touch case.

I have sunnylife CPL+ND8+ND16 set too. When i put under the light the coating reflection of CPL is red, ND8 is yellow, ND16 is... nothing.

keyboardpilot Posted at 2-23 00:19
I have sunnylife CPL+ND8+ND16 set too. When i put under the light the coating reflection of CPL is red, ND8 is yellow, ND16 is... nothing.

Mine doesn't have a serious color casting issue but its sun flare is not looking clean.

Now I see that freewell filter also has simular issue.

Geez..... aren't all ND filters supposed to have anti-fog coating outside as well as inside????

bigbearhk Posted at 2-28 21:39
Geez..... aren't all ND filters supposed to have anti-fog coating outside as well as inside????

At least these two don't have the inside coating or the coating is insufficient.
It is more prominent because OP gimbal head heats up and create more chance to fog up.

I wonder PolaPro filter is any different.