I've been reading these boards with interest and have started a bit of a lens collection. I think that might be a natural progression... Anyways, I've noticed that when comparing focal lengths of different lenses it is common for someone to suggest that you could achieve the field of view of a narrower lens by cropping a picture from a wider one. This is true, but results in a lower resolution image, not ideal. Then I got to playing around with Hugin software and stitching panoramic photos and it occurs to me that you can also achieve a wider field of view by taking multiple overlapping photos with a narrower lens and stitching the results together. Instead of losing resolution, as you do with a crop, you actually gain resolution... So, when someone wants a 12mm 2.0, but doesn't want to spend $800... perhaps we could suggest getting a 45mm 1.8 and taking more pictures.