Close up lens question what is NL?
Jun 11, 2020 14:30:58 #
I noticed B+W filters have a magnification rating and also a NL rating. For example:
B+W 58mm Macro Close-up +10 Lens (NL10)
What is NL?
B+W 58mm Macro Close-up +10 Lens (NL10)
What is NL?
Jun 11, 2020 14:40:39 #
JD750 wrote:
I noticed B+W filters have a magnification rating and also a NL rating. For example:
B+W 58mm Macro Close-up +10 Lens (NL10)
What is NL?
B+W 58mm Macro Close-up +10 Lens (NL10)
What is NL?
NL means “Non Linear”
So the NL 10 will magnify +10 in the case you showed.
Jun 11, 2020 14:43:53 #
PixelStan77 wrote:
NL means “Non Linear”
So the NL 10 will magnify +10 in the case you showed.
So the NL 10 will magnify +10 in the case you showed.
Thank you. So NL means “non linear” and that’s sounds bad. A NL rating of 10 is good or bad?
Jun 12, 2020 10:12:23 #
It’s not a rating. It’s the strength of the lens. Their +3 lens has an NL3 designation.
Jun 12, 2020 10:32:36 #
aflundi
Loc: Albuquerque, NM
JD750 wrote:
I noticed B+W filters have a magnification rating and also a NL rating. For example:
B+W 58mm Macro Close-up +10 Lens (NL10)
What is NL?
B+W 58mm Macro Close-up +10 Lens (NL10)
What is NL?
From the German word Nahlinse which means 'Near-lens'. It specifies the diopter, so +10 NL10 is redundant.
Jun 12, 2020 11:08:08 #
aflundi wrote:
From the German word Nahlinse which means 'Near-lens'. It specifies the diopter, so +10 NL10 is redundant.
That explains it!
Thank you for the reply.
Jun 12, 2020 13:12:48 #
aflundi wrote:
From the German word Nahlinse which means 'Near-lens'. It specifies the diopter, so +10 NL10 is redundant.
Thank you for a rare instance of accuracy on UHH.
•=•=•==••==•===••==•=•==•=•
FWIW, invert the diopter rating and you have the diopter lens to subject distance when the principal lens is set for infinity focus. (Distance in whole meters.)
IOW for a +10 diopter, distance equals 1/10 of a (whole) meter (AKA 4 yankee imperialist inches).
——————————————————
For those who need a film to subject distance just measure the distance from the diopter lens to the film plane and add that to the inverse of the diopter strength.
For noobiegeeks who may have bitten off more than they can chew:
For the +10 lens the diopter lens to subject is 4 inches so if the diopter lens is 5 inches from the film plane then the verrrrrry important geek dimension is 9 inches from subject to film plane.
Jun 12, 2020 13:34:24 #
User ID wrote:
Thank you for a rare instance of accuracy on UHH. <snip>..
On UHH you get:
(1) Expert advice
(2) Strong conflicting opinions
(3) Completely wrong answers.
It’s up to the reader to sort them out.
Jun 12, 2020 13:51:54 #
JD750 wrote:
On UHH you get:
(1) Expert advice
(2) Strong conflicting opinions
(3) Completely wrong answers.
It’s up to the reader to sort them out.
(1) Expert advice
(2) Strong conflicting opinions
(3) Completely wrong answers.
It’s up to the reader to sort them out.
Yes I always print them all out and cut them into equal size pieces and put them all in a bushel basket and shake well before I reach in and pick one to believe.
Jun 12, 2020 20:40:19 #
User ID wrote:
Yes I always print them all out and cut them into equal size pieces and put them all in a bushel basket and shake well before I reach in and pick one to believe.
Jun 13, 2020 22:29:12 #
Jun 14, 2020 12:48:38 #
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