Question 1

Is it normal for the cpl not to have a minimum and maximum stop? it just keeps turning and theres no real way to tell how much effect its having.

Accepted Answer

A polarizing filter or polarising filter is often placed in front of the camera lens in photography in order to darken skies, manage reflections, or suppress glare from the surface of lakes or the sea. Since reflections (and sky-light) tend to be at least partially linearly-polarized, a linear polarizer can be used to change the balance of the light in the photograph. The rotational orientation of the filter is adjusted for the preferred artistic effect.

neutral density filters has two linear polarising layers. When they are at 90° to each other, they let almost zero light in, admitting more as the angle decreases. so varaible ND filter has min and max stop but CPL does not have, hope this helps.
We care about our customers, any questions, you can ask us directly at aftersalessupport@kentfaith.com. All emails would be replied in 24 hours, no exception

Question 2

Where is the 68mm filters? i have a lens with 68mm filter thread, no k&f filters seem to be available.  only 67mm...

Accepted Answer

Can you send us your lens model name via Amazon email? We can help check the filter size. The number after the "Ø" (diameter) symbol represents the size of the mirror. Such as 24-68mm does not mean that the lens is 68mm

Question 3

What is the difference between the blue and the green version of this cpl?

Accepted Answer

Different coating. The green version is part of their nano-X range that has anti-oil, anti-scratch, waterproof coating.

Question 4

Is it normal for the cpl not to have a minimum and maximum stop? it just keeps turning and theres no real way to tell how much effect its having.

Accepted Answer

A polarizing filter or polarising filter is often placed in front of the camera lens in photography in order to darken skies, manage reflections, or suppress glare from the surface of lakes or the sea. Since reflections (and sky-light) tend to be at least partially linearly-polarized, a linear polarizer can be used to change the balance of the light in the photograph. The rotational orientation of the filter is adjusted for the preferred artistic effect.

neutral density filters has two linear polarising layers. When they are at 90° to each other, they let almost zero light in, admitting more as the angle decreases. so varaible ND filter has min and max stop but CPL does not have, hope this helps.
We care about our customers, any questions, you can ask us directly at aftersalessupport@kentfaith.com. All emails would be replied in 24 hours, no exception

Package Dimensions L x W x H	11.2 x 10.8 x 2.2 centimetres
Package Weight	0.12 Kilograms
Product Dimensions L x W x H	7.7 x 7.7 x 0.1 centimetres
Item Weight	0.11 Kilograms
Brand	K&F Concept
Part number	P15-KF01.973
Size	77MM
Water Resistance Level	Waterproof
Photo Filter Effect Type	Polarizer
Photo Filter Thread Size	77 Millimetres
Guaranteed software updates until	unknown

K&F Concept 77MM CPL Filter 28 Layer Super Slim CPL Circular Polarizer Filter Multi-coated Polarized MRC Filter (Nano-X Series)

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