Phase One V-mount P25+ Digital Back 22-megapixel Sensor size: 48x36mm This is twice the size of a typical full-frame 35mm sensor (arranged as two side-by-side vertically). It can be mounted directly onto Hasselblad 500 series bodies. This model can be mounted on the body even when rotated 180 degrees for vertical shooting. I am selling this because I purchased a larger sensor. While it's not noticeable for my use (handheld snapshot photography), when zoomed in to 100% and looking closely, horizontal noise lines can appear in dark areas. This also occurred with a previous Phase One model from the same series, so I cannot recommend it to those who are concerned. This is more likely to occur with underexposure. As a countermeasure, I found it worked well to overexpose slightly and adjust in Lightroom. Also, it is more likely to occur indoors than outdoors during the day. Please refer to the sample photos. Photos 12 and 13 are examples of insufficient light. Exposure was increased by +5 in Lightroom. ISO 200, shutter 1/250 Photo 14 is under the same conditions, shutter 1/60. The original was very dark due to insufficient light, but after adjusting exposure by +4 in Lightroom, the noise was not noticeable. Photos 15 and 16 (ISO 400, shutter 1/125) and 17 and 18 (ISO 200, shutter 1/125) are examples of indoor and outdoor shooting, respectively. Noise is visible in the dark tones in the lower right of photo 15, but it is more apparent in photo 16. In outdoor shots 17 and 18, there is no noise at all, even though the subject has dark tones. Included accessories: 2 batteries, 1 charger, 1 strobe cable (worn but usable), 1 body cover, 1 original attache case. Also, I'm including a film screen (manufacturer's original) to place on the focus screen when using it with the 500 series, so you can see the actual shooting area. Please refrain from price negotiations. Thank you.