I basically lost 2 out of every 3 shots last trip when doing the up close Rolleinar #1 focusing at around f2.8-4 with the Rolleiflex. I bought this rather weird looking item today with the hopes it can help me focus better. An expensive unit as most things Rolleiflex are at $199 USD but if it can help me get a highter percentage of sharp images it is definitely worth the cost.