

Many prefer the "fat pixel" colors and tones over other sensor designs, but they are very prone to moire issues when shooting fashion or portraiture. But they have the larger "fat pixels" which are good in some ways and bad in others. P25 and P25+ are the cheapest "full frame" models, with sensors closer to 6x4.5 film frame. Other models in that Phase lineup are also good, with the P30 being especially popular with Contax users. The Phase P45 recommended by coronawithlime is excellent, if you can find it and afford it. Backs for Hasselblad V, Hasselblad H and Mamiya/Phase mount are far more common in much greater variety to choose from. Unless you get lucky and find exactly the back you want when ready to purchase, you'll probably need to "settle" for whatever back becomes available to you in Contax mount at a reasonable price. Good model digital backs (even not-so-good models) with Contax 645 mount are in very high demand but very limited supply.
