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Input:
Question: Is the 58 mm filter adapter better than 67 mm adapter for the Canon PowerShot SX series camera? How can the different ring shaped filter, 58 and 67 mm be screwed onto the same lens? Which adapter  may affect the lens retraction?
Document: Excellent fit and finish for the Cannon SX30IS.I had purchased some 58 mm filters and an adapter elsewhere that were supposed to fit the Canon PowerShot SX line, but found that there is a slight change in the threading on the SX30IS from the earlier models. This adapter fits like a glove whereas the other fit more like the infamous OJ glove (almost, but too tight to really go on). The 58mm lenses easily mate up which makes this item essential for anyone who wants to get the most out of there SX30IS without paying 4X as much for the OEM adapter.
Item arrived earlier than expected and performed as described on my SX50. A little snug to get on (after getting the slots lined up correctly), but that's better than loose. Camera lens closes normally and old lens caps fits fine with it on, so I'll leave it on permanently. I used a 58 to 52 step down ring to try a old Olympus C-180 teleconverter (1.7X and very light weight) on the camera, but the resulting images, while blown-up appropriately, contained no additional detail, so I'll only be using this adapter with normal filters.
I do sometimes use UV and polarizing filters with my digital cameras. In order to use the filters with the Canon SX40, it is necessary to have an adapter ring so I purchased the 58mm lens conversion adapter ring from Digital Goja. The adapter ring is metal, not plastic and very easily twists onto the camera. It fits snugly and does not wobble and the filters thread onto the adapter ring very snugly. I am quite pleased with the quality of this adapter ring and would recommend it to others.
I already had 58mm filters from other cameras, so thought the product was worth a try given the price. Worked perfectly with the Canon SX40--screws on and off very easily. Well threaded to receive and remove the filters. Feels surprisingly sturdy. A warning, however: I've since bought the SX50, and it's a significantly tighter fit on that camera. Much harder to get on and off. You have to zoom the lens out and hold onto its barrel while you're putting on the adapter to make sure you don't put torque on the lens itself when you twist the adapter ring.
Works great with my new Canon Powershot 40SX. I use it to place a filter on my camera lens to keep the lens from getting damaged. :)
This lens conversion adapter ring fit perfectly onto our SX30is. We can now use the 58mm polarizer with this camera. Item is as described and shipping was super fast.
Good quality and price. Slips onto the SX50 to provide 58mm threads so I may use my Digital Rebel lenses and accessories on this camera.
Despite what other reviews may say, it is not hard to fit on the lens and takes filters well. I bought 2  in order to keep them on my grad nd and circ. polar. filters all the time. It is minor that it does take some effort to remove a variable ring filter from the ring adapter.
fit my SX40 camera like a dream, was able to attach a UV filter on adapter with no problem. Takes a little effort to remove and install but this is fine since it will stay locked in place when installing lens cap and when you are removing camera from bag. 58mm size keep it close to same size as lens housing and makes it much better to handle.
Ordered this adapter after a different seller sent one that didn't fit. This one fits. It appears to be well made. It could stand to be a little more snug, but it does the trick and holds filters in front of the lens. Be careful to hold the adapter ring while unscrewing filters so that the ring doesnt come off the camera. Repeated installation and removal could eventually cause wear on the lens and make it fit more loosely.
Answer: Hi, I've tried and compare the 67mm adaptor from canon. But the filter will be cheaper if u get 58mm compare with the same filter with 67mm. The adaptor is a kind if like twist and lock to the lens mounting just like mount a hood. It does not affect the lens retraction. The 58mm and 67mm are actually referring to front side of the adaptor where u CDMA fit in the filter. The other end where u twist and lock to the lens mounting, both type are the same size.