Originally posted by Jonathan Mac These look very good. I've never gone for an M 40mm as they don't have a reputation as a sharp lens and are usually over-priced, plus I have the 40mm limited. These shots indicate that it's a lens that could be worth keeping on the shopping list.
How is it for sharpness at wider apertures?
I don't think I have taken any shots wide open so far. I have used it only couple of times. I have planned to shoot SIC with 40 on July, so after that I know a lot more.
There was a thread on the forum about 40 pancakes with some comparison shots. Wide open apparently:
Is the 40mm 2.8 Pancake really that bad? - Page 3 - PentaxForums.com
Wide open the corners are weak on both lenses on FF camera and M40 is softer overall than modern 40. Stopped down M probably compare better. As you already have ltd I can't see why you should get M other than simple joy of owning it. But, honestly, between M35/2 and all the M50's, it's the only real reason why I got it and I still consider it 95€ well spent