I'll second Claire's suggestion to look for a Russian viewfinder. I've got one, and I see auctions for two just like it on eBay now, plus a few in eBay stores -- search on Dead Link Removed. Unfortunately, they (and many other Russian/FSU photo products) have gone up in price over the past couple of years. Still, there are a couple of auctions that should go for $40 or less, shipped, assuming there aren't many bids on them. (Check the sellers' other items; maybe you'll stumble across something else you'd like, which may help bring the per-item shipping costs down, albeit at higher total cost.) These viewfinders are actually multi-format, with five focal lengths ranging from 28mm to 135mm, and one of these is 50mm. I use one with my FED 5 camera.