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>Are you using the center weighted filter? It's expensive protection but recall what the len costs. Stick with something around that thickness. Here's what I do with filters not used for protection. I use a 72mm filter in front of the center weighted filter. I hold it in place with a product called the McCl&. Try McCl&.com. The site is still under construction but you'll get the idea. The McCl& will also allow you to hold soft grad filters in front of the lens to balance exposure. Sure you can't get too fancy in locating the grad but I just go with halfway. The results can be really impressive. I've also held polarizing filters in front of the lens.
G'day, I'm new here. I'm close to buying a xpanII/TX-2 & trying to take all things into consideration. Similar to Afzal, I'm hoping to use a Heliopan Linear Polarizer over the centre filter & have a UV over the centre filter when the Polarizer isn't on.
Any problems with vignetting?