I did find the 46mm (after emptying several boxes, three times each) so could use that with my 46-49mm step-up (which I also found), and if it vignettes I can pretend to myself if was Artistic Intent.
The trouble is the last time I had the damn thing was just 12 months ago, and my house hasn't got any tidier in the interim. That difficulty is compounded by the fact that, rather like a small child, when I finish using something I tend to put it down wherever I am ... I expect all you sciency-everything-in-it's-place-and-a-place-for-everything types will be rolling your eyes and tut-tutting of course ...
In my harum-scarum days my friends would come round of an evening to collect me for a night out, and simply came in and made themselves comfortable with the TV and a drink whilst I spendt anything up to 40 minutes trying to find my keys, cigarettes, wallet, lighter ... u.s.w. ... so it's nothing new.
Well, the consolation is; you're not alone. My Dad used to say it's because "you have too much stuff"! Unfortunately, I "have too much stuff". Now I've got to go look for that IR filter I can't find. Summer is here and it's time for IR photos.
Moma don't take my Kodachrome away!
Oops, Kodak just did!
For all practical purposes, they've taken Kodak away.
If you normally use it on either a rangefinder or TLR, take a good look at that lens cap again.
If you normally use it on a lens that can be removed from the camera, take those lens caps off and look again.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2