Dont be deceived by the nissin i40s svelte dimensions this mini marvel packs a guide number of 40 at 105mm video lighting adjustable over 9 stops a real boon at special events at gigs where you can freely switch between videography and still photography and a specification replete with high end features although perfectly proportioned for smaller dslrs and compact system cameras the i40 is equally at home on full size dslr models weighs only 203g and fits easily into a pocket the fla