To Asle and Wolfgang: In your opinion, would the Sachtler DV6SB or FSB8(+ matching legs) be acceptable for shooting with a 300mm (mine is f/4) plus heavyish DSLR (mine is D800) at the "danger zone" shutter speeds between approximately 1/160th and 2 seconds, as one might do when shooting a tele landscape in low light?
I know a giant Sachtler Video 18 would work, but it's big and many $$$.
in my opinion it would, but i'dhave to test it out because this is not the range i am working, so far i have not used it too much in low light. Mostly i am working with 600-1000 mm focal lengths but faster speeds, sometimes touching the danger zone (say 1/125 or 1/60but not going down to 1 sec and at medium distances.
I have chosen the FSB8 (after intensive discussion with Mr Burzinsky) because it is optimized for "weight balance" of 8 kilogramms which equals the gear i am using, the heavy video heads are dedicated forheavier video-cameras, it was adapted from 75mm to 100 mm to suit the ENG 2CF.
Shooting low- light landscape (including larger distances) is a differnt story
I would not consider the head beign a potential problem but too much leg extention of the last segment (single tube instead of double) in combination with windy conditions
then atmospheric haze (did series of bird in wetlands shots where it was impossible to gain the desired sharpness due to this influence)
and finally the 300/4 itself (don't have any , just a 300/2,8) and its tripod collar, might be worse compared to a heavier lens, i know the old 400/5,6 to be very intricate in this aspect.