Fotodiox7 Step Up Ring Filter Adapter Set, Anodized Aluminum, 49-52mm, 52-55mm, 55-58mm, 58-62mm, 62-67mm, 67-72mm, 72-77mm

Bom material - com roscas ok. Vale a pena!

muy muy buenos y a gran precio, me han servido muchisimo, pero son delicados y si se llegan a caer o golpear se puede fregar la rosca y ya no embonan. asi que hay que tener cuidado

Very useful

I've had these rings for a couple years now and they work great. They can be a bit of a challenge to loosen if they're on too tight, otherwise a good product. I often use mine altogether as a lens shade when they're not required.

I'm an ameature photographer with a D90 and 3 lenses. I decided to take advice I'd read and been given and stop buying various size filters and use step up rings to standardize around 77mm filters. This doesn't seem like a big deal if you are buying $15 filters, but once you start buying $50 filters (or more!) then the thought does occur to you that this could get expensive (hey... if you want a cheap hobby, get out of photography!).I've used these on a 52mm lens and on a 67mm, with filters of varying sizes up to 77mm (my new standard size). My thoughts are that they are reasonably well manufactured rings. Quite light but sturdy. Some people have written about problems with them becoming jammed together. My advice on that is to remember that these rings are just a mount for your filter... they are not holding your car engine in place. Tighten accordingly :-). I've been tightening them just to the point of resistance and have had no problems in 20+ uses. I've also read that the threads are small and hard to use. While I can see how people could become frustrated and damage the threads, if you use a reasonable degree of patience you'll be fine. My technique is to hold them gently together and turn them a little as if I was undoing the thread, then reverse to screw them together... perhaps going back and forth gently a couple of times to "seat" the threads together before I get them together.In any case, at the price of these little babies, you could afford to get a couple of sets and still be way out in front compared to the cost of buying multiple filters.I don't give out a 5 star review very easily but in this case I see no reason to hold back. There are much more expensive German made items on the market that may be more durable and quicker to thread than these, but for a guy with a family and a budget, these rings are great.