I just bought a Lee filter system and I am really shocked about the build quality of that system. The adapter ring has a faulty finish with markings on it, which then were fixed with a pen as a cover up. After returning that adapter ring I got another one just like it. I conacted the manufacturer which explained to me that these markings are caused in the manufacturing process, quote: "The marks inside the ring are voids left during the anodising process. The rings are suspended in the solution by small wire 'hangers' and these leave voids where they touch the metal."
This I never have seen from any other manufacturer.
See picture for this.
Above all my 0.9 ND pro glass came with tiny specles of yellow finish on the glass right under the yellow label. This goes well 30mm into the middle of the glass. On a glass worth of 200 Euros. Also not what I would call high end. This is just bad quality so far. I haven't given up on it completely but one more of this stuff not gone through the quality control or badly produced and I will send the whole shabbang back.
As you have supplied wonderful photos of Lees shoddy workmanship in the manufacturing of your filter system, could you please supply a photo that was ruined by this inferior system?
No? I didn't think so.
@ OP: Agree with others who recommend Lee Filter System. Though they are pricey at the start, if you're in this picture thing for the long haul, they are actually the best investment for quality and versatility.