Most helpful positive review
7 of 7 people found the following review helpful
save loads on filters
on 26 November 2013
With the exception of the basic UV filters that many photographers attach semi-permanently to any lens that will take them - mainly to help protect the front element of the lens from damage - these adapters make it completely pointless to buy smaller size filters of any given type. I recently decided I wanted a good dark ND filter but the cheap ones got mostly bad reviews and I have lenses of at least 3 different diameters and might want to use an ND filter on any of them. Answer - buy one filter for the widest lens you have (or are likely to have in future) and buy these adapters so that you can fit it on any other lens you have. Spend £6 on two adapters and save - in my example - well over £100 on filters.
All the adapter has to do is screw easily into the smaller lens and, in turn, have the filter screw easily into itself - and have both operations easily reversed. Though note the comment in sud's review about removing the filter in cold conditions - the adapter, being all metal, is likely to contract more than the filter, which is a metal ring round glass, making the join very tight, so it may be necessary to warm it (your hand will often be adequate) before the filter can be removed - don't force it! Cold shouldn't cause any problems in separating the adapter from the lens, though very hot conditions conceivably might.
The only other word of caution I'd add is that if the end element on the lens rotates when you focus - e.g. on the Canon 18-55mm f/3.5-5.6 IS often supplied as a kit lens with the cheaper EOS cameras, or its telephoto brother 55-250mm f/4-5.6 IS, both in their Mark I or II versions - then you won't be able to use this type of adapter with a filter that's too dark to focus through, i.e. a particularly dark ND filter. This is because if you have to focus with the filter off, screwing it on is certain to put the lens out of focus again. Although even then, I guess you could use it if focusing to infinity. Assuming the lens IS focused at infinity when it says it is, which many cheaper ones aren't.
Anyway, it works! It's made of metal and is as robust as one could expect for £3 - it shouldn't bend under normal use. There's no light leakage - particularly crucial if you're using a 10 stop ND filter and leaving the shutter open for minutes on end in bright daylight. A great and very simple product - filter manufacturers must hate them.