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| H4D-40 |
| at a glance |
| 7304 x 5478 |
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| 3.0" lcd screen |
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| CF II |
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| Li-ion rechargeable |
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Hasselblad H4D-40 review summary |
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| camera date |
Mar 10 | |
| pixels / class |
40M | Pro SLR digital camera |
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| overall rating |
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| ease of use |
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| digital features |
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| user profile |
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| Hasselblad H4D-40 specifications |
| lens / zoom | Hasselblad HC and HCD lenses with integral leaf shutter. All lenses from the V system with optional CF lens adapter |
| focus / macro | auto / manual |
| metering mode | average, center-weighted, spot |
| aperture | |
| white balance | |
| shutter | 256s - 1/800s |
| exposure | |
| flash / mode | hot shoe |
| viewfinder | 90° reflex viewfinder w. diopter adjustment |
| iso ratings | 100 - 1600 |
| image size | 7304 x 5478 |
| image format | raw (3FR) |
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| connectivity | FireWire 800 (IEEE1394b) |
| storage | CF II, tethered |
| platform | |
| extra features | sensor size 40.2mm x 53.7mm
histogram |
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Hasselblad H4D-40 announcement clippings
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The traditional solution for most DSLR cameras has been to equip the camera with a multi-point AF sensor which allows the photographer to fix an off-center focus point. Such multi-point AF solutions are often tedious and inflexible to work with and due to the physics of SLR cameras, the offcenter focus points are all clustered relatively close to the image center. To set focus outside of this center area, you are still forced to focus first, then shift the camera to reframe, with resulting loss of focus as a result.
To overcome this problem, Hasselblad has used modern yaw rate sensor technology to measure angular velocity in an innovative way. The result is the new Absolute Position Lock (APL) processor, which forms the foundation our new True Focus feature. The APL processor accurately logs camera movement during any re-composing, then uses these exact measurements to calculate the necessary focus adjustment, and issues the proper commands to the lens's focus motor so it can compensate.The APL processor computes the advanced positional algorithms and carries out the required focus corrections at such rapid speed that no shutter lag occurs. The H4D's firmware then further refines the focus using the precise data retrieval system found on all HC/HCD lenses.
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