As a landscape photographer I primarily shoot with a tripod in low light (sunrise & sunset) conditions, usually at the very low iso of 50 on my Hasselblad Medium Format H3d-39. I have only used the H3d for handheld work with very bright daylight conditions that allow me to use a high shutter speeds with a low iso (usually no higher than iso 200). The image above of glaciers on Denali in Alaska was shot with the H3D handheld from an airplane in very bright conditions.
Last week I traveled to Calumet in San Francisco to check out the new Hasselblad H4D-40 megapixel camera. The Hasselblad video presentations on the camera seemed to really be promoting it as a handheld shooter. You can see the videos at this link:
I was able to shoot a few frames outdoors with this new camera at various isos, ranging from iso 100 to 1600. I was very pleased with the quality of the 40 megapixel files at high isos, and found that iso 800 could easily produce a large exhibition quality print. With more agressive noise reduction the iso 1600 could produce a good print. At iso 800 I could shoot at 1/400 of a second at f16 outdoors in overcast conditions. At iso 100 I was 1/20 of a second at f14. 1/400 vs 1/20 shutter speed is the difference between getting a good depth of field wildflower scenic shot on a breezy day versus getting nothing usable. I prefer handheld shooting for photography overseas and in more developed urban areas - it is really a pain to set up a tripod in urban areas or really anywhere there are people around. Tripods really create unwanted attention. With a very usable iso of 800 that can be pushed to 1600 I think the H4D 40 can realistically be used for handheld photography, and most importantly produce wonderful high resolution files that can make large prints. Given that the H4D is really no more of a burden to carry than a large DSLR like the Nikon D3/D3x, I think the H4D is now viable for me to carry that as a handheld system.
Hasselblad's new True Focus technology will also be very useful for me since I do a lot of landscape compositions that require focus on a very close foreground in the lower portions of the frame. I have an upgrade order in for an H4D-60 which has true focus. The H4D-60 has a different sensor than the H4D-40, so I will plan on testing its high iso capabilities before determining which H4D system to upgrade to.
Here is a link to download a 22 megapixel size crop of an H4D file at iso 800 - no sharpening or noise removal has been applied to this file: