I would like to buy an infrared filter for my 77mm lenses, and am confused by the huge differences in price for varying filters. The cheapest one I see new on Amazon is just over $50, while my local camera shop sells them for $295! So, are not all infrared filters created equally, given these huge price differences? Should I just save my money up to get a high dollar one because it would be worth it, or can I just buy the $50 filter? BTW Freebooter: It very well could be those neat infrareds you've posted that have motivated me to get an infrared filter.