Originally posted by Midnight
Hi Blankies. Assuming you get the CLA-1 lens adaptor tube, you will have 43mm filter threads. All you need then is a 43mm->52mm (or whatever) step-up ring to mount any auxiliary lenses, filters or other such accessories you want.
Having said that, though, step-up rings with a rear diameter of 43mm are a little hard to find, but most of the better shops in Singapore (CP, AP, etc) have 43->46mm and 43->52mm rings and perhaps a few other sizes. If you can't get a step-up ring to go directly to the filter thread size you want, you can then put a second step-up ring (eg. 46->55mm) on top of the first one. The main disadvantage is that this increases the risk of vignetting.