Forgotten in its old age

by Aditya

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15
votes
7answers
4k views

What is the difference between using an ND filter versus 2 polarizers?

I know what an ND filter does. I know what a polarizer does. I also know what two polarizers stacked together and rotated properly do. So the question: why should I use an ND filter to achieve a ...
11
votes
6answers
2k views

Does stacking more lens filters decrease overall image quality?

As stated by @t3mujin in another thread's comments: Stacking filters will decrease image quality, as it's another piece of glass light has to go through before reaching the sensor. I was ...
14
votes
2answers
1k views

What's the result of stacking ND filters in terms of total stops?

If you stack two 3-stop neutral density filters, does it reduce the exposure by 6 stops or 9 stops?