This 20mp back has a firewire 400 port to shoot tethered, great way to capture digital images from your Hasselblad especially with the price of film now! 

Technical specs below, any questions please message me.  

Total pixels: 4,145 x 4,145

Effective pixels: 4,080 x 4,080

Effective size: 36.9 x 36.9 mm (1.5 x 1.5")

Pixel size: 9 x 9 micron

Imager ratio: 1:1

Antiblooming: 8 f-stops

Digital image

Color depth: 48 bit per color

(16 bit per color)

Dynamic range: 12 f-stops

Single exposure: 4,080 x 4,080 pixel

24 bit RGB: 48 MB

48 bit RGB: 96 MB

64 bit CMYK: 128 MB

Basic sensitivity

ISO: 50 or 100

System

Exposure time: 16 sec. to less than

1/1000 sec.

Capture rate: 3 sec. per image

IR filter: Mounted on CCD

Interface: Direct IEEE 1394/

Power: 8-40 V DC

Lighting conditions Flash, tungsten, daylight,

fluorescent, HMI

Data format & compression

Extended Phase One Format, TIFF-RGB,

TIFF-CMYK, JPEG, HTML

Color management workflow

RGB, Embedded ICC profiles, CMYK

Operating conditions

Temperature: 0°to 50°C (32°to 122°F)

Humidity: 15 to 80% RH

(non-condensing)

Physical dimensions

Height: 99 mm (3.9")

Width: 92 mm (3.6")

Depth: 53 mm (2.1")

Weight: 450 g. (1Ib)