Weekly Nikon news flash #156

Sigma finally announced the price and availability of their new 50-150mm f/2.8 APO EX DC OS HSM lens: $1,099; shipping will start in early May. See the full press release here.
New Nikon cashback program in the UK includes the D3100, D5100, D7000 and Nikon 1 (up to £100).
Voigtländer APO-Lanthar 90mm f/3.5 SL II lens is now discontinued (yes, Voigtländer does make lenses for Nikon DSLR cameras).
Nikon D800 vs. Hasselblad HD4-40 vs. Leica S2 vs. Sigma SD1 image comparison at different ISO (click on images to see the samples).
Nikon D3100/D5100/D7000 video time limit has been located in the firmware. A new update is now available to extend the video recording time limit. If you have a Nikon D3100/D5100 camera and are willing to beta test it, see this post. Please note that this is not an official firmware update from Nikon.
The Nikon WT-5 manual is now online. See also this WT-5 alternative that costs $30.
This image was captured with a Nikon D2Xs camera (read the story here, credit: ESA/NASA, click on image for larger view):

The Nikkor 24mm PC-E lens works without any problems on the D800 – it just clears the prism housing, to use the camera in portrait mode however, you have to rotate the lens the “wrong” way (clockwise) so the adjustment knob is on the right-hand side of the camera as you operate it. If you rotate the lens to the counter-clockwise the shift adjustment knob fouls the prism housing. It’s not a major issue, more a different way of working, for me at least (thanks Paul Harmer):