I have a Nikon 18/3.5 which is nice but quite big and heavy. I tend not to use it because if this so I'm wondering if I should trade it for a 20/3.5. The 18mm is 350g and extends 61.5mm The 20mm is 235g and extends 40.4mm it also uses 52mm filters. I know the 18mm has CRC but the 20mm doesn't but I don't think that's going to bother me. Does anyone have any experience with the 20/3.5? Please bear in mind I print no larger than 10x8. Thanks!