what are the stop equivalents on the ND w/20x lens? at DVinfo.net

Lonnie Bell · August 8th, 2006, 09:35 AM

i'm purchasing a matte box, and what to purchase some filters, and some more NDs, graduated and non-grads, but i don't want to duplicate what the 20x lens comes with... the lens ND markings read: 1/6 & 1/32
1/6 = less light & 1/32 = even less light

but when everyone else markets their filters:
ND ---- f-stop reduction
.1 ------ 1/3
.2 ------ 2/3
.3 ------ 1
.5 ------ 1 2/3
.6 ------ 2
.9 ------ 3
i get the math .1 = 1/3stops, thus the greater the ND number - the less light allowed... but by the 20X lens markings, 1/32 < 1/6 (mathmatics) so this would mean the 1/32 should let in more light - it doesn't... so can someone explain to me the markings or offer their f-stop equivalents...
thanks,
Lonnie

August 8th, 2006, 09:35 AM	#1
Lonnie Bell Major Player Join Date: Mar 2006 Location: Las Vegas, NV United States Posts: 361	what are the f-stop equivalents on the ND w/20x lens? i'm purchasing a matte box, and what to purchase some filters, and some more NDs, graduated and non-grads, but i don't want to duplicate what the 20x lens comes with... the lens ND markings read: 1/6 & 1/32 1/6 = less light & 1/32 = even less light but when everyone else markets their filters: ND ---- f-stop reduction .1 ------ 1/3 .2 ------ 2/3 .3 ------ 1 .5 ------ 1 2/3 .6 ------ 2 .9 ------ 3 i get the math .1 = 1/3stops, thus the greater the ND number - the less light allowed... but by the 20X lens markings, 1/32 < 1/6 (mathmatics) so this would mean the 1/32 should let in more light - it doesn't... so can someone explain to me the markings or offer their f-stop equivalents... thanks, Lonnie __________________ Lonnie Bell mamas boy productions Las Vegas, NV Last edited by Lonnie Bell; August 9th, 2006 at 07:55 AM.