I purchased the lens adaptor for my Canon PowerShot G5 so I could use filters, primarily a polarizing filter. But I am finding using the filter to be...well, a guessing game.
On my TTL 35mm SLR film camera I would look through the viewfinder while turning the polarizer until I got the desired effect, which I could visually see through the viewfinder. However, on my digital camera the view finder does not view through the lens, so that's not gonna work anymore. Also, if you are outside in bright sunlight the camera's LCD viewer is also worthless in terms of seeing what difference the polarizer is making.
So how do I get that polarizer set right on my digital? Seems like I'm going to have to know something about sun location in reference to the subject, and then know aproximately what position the polarizer lense needs to be in as a result. Is that correct? Anybody want to spell out how I figure all that out? There is a mark on the polarizer's outter ring. That should lend itself toward some kind of aproximation rule, right?