The non-green sticker G1 will only take the 28, 45 and 90 lenses. More precisely, the non-stickered G1 will only adjust the viewfinder for the 28, 45 and 90. The 16 works on either G1, because it never used the internal finder. The green sticker G1 will take the 21 and 35. I don't know if it will take the zoom (which is the other "why did they ever make this" lens, after the 16 - it duplicates focal lengths already covered by the other lenses, is slower, and although quite good for a zoom, isn't as good as the primes).