Thank you for the kind words, @mconnealy! I have to give credit to Gelatin Labs, they did the developing and scanning. Not only did they do an excellent job with the scans, they do not charge extra to scan half-frame (or panoramic) film. Never underestimate how much difference a good lab can make, especially in bringing out the best from half-frame cameras like the Pen S.
@skopar steve, I haven't tried searching for contrast filters, but the Pen S has a 22.5mm filter thread which seems like an uncommon size. I did a cursory search at B&H, and they don't seem to offer circular filters in that size.
Yes it is. If you do a search on "picclick.co.uk" (which is just a way of searching ebay with all the results on one page), you get sets of filters (Yellow, Orange, Red and NDx4 made by Sigma for their 500mm/600mm mirror lens.) There are also filters made by B+W (last year there was a large set of filters listed by a German seller, but they wouldn't post any to the UK), there were various shades of of the usual colours as well as light Blue and colour conversion filters. I have a Yellow-Green filter by zeiss-ikon, a B+W NDx2 filter, a Sigma set and a Hoya UV filter, which looks coated. So with patience it is possible to find contrast filters of 22.5mm thread.
Chevy Dealer Back Lot by Neal Wellons, on Flickr
