When you buy this 67mm filter adapter make sure to buy a 67mm lens cap along with it since the one comes with camera won't fit after mounting this adapter. Don't take one or off the filter adapter too often because then it will damageand you will nee another one soon. I have seen so many people complain about these filter adapters are low quality and they have to replace those often. That happens when you don't use these items with care. I have 3 58m filter adapters which I bought for my Canon SX10 Camera and after nearly 5 years these filter adapters still work fine.
Also there are third party 58mm filter adapters for Canon SX40 / Canon SX50 cameras and you might able to get it for cheaper but if you like to keep everything original then Canon FA 2DDC67A Filter Adapter is the best one among the lot. Also there is Bower 67mm filter adapter which is cheaper but customers seems have complains about it because of it's made of plastic (Canon adapter is plastic too). I think main reason for all these problems like cracking or breaking is the way they handle.
You can buy this original Canon 67mm filter adapter for Canon SX40 and other bridge cameras from Amazon for only $29 with free shipping. If you are going to buy this the make sure to pick a 67mm Lens Cap (Here) which is only $2 along with it too. Otherwise you will need to order it again later. Also another accessory which might come handy is a 67mm UV filter which is one of the first reason why you need this filter adapter. That's to use this UV filter as lens protector for your SX40 Camera.




