back alley
IMAGES
what's it for.
it's blue.
joe
it's blue.
joe
p.o.b. filter?
- Thread starter back alley
- Start date
- Latest activity Latest activity:
- Replies 8
- Views 907
VictorM.
Well-known
It is blue. No idea, but I have one too.
Kim Coxon
Moderator
Haven't come across the letters POB but many blue filters are colour correction such as morning and evening in the lighter shades to the colour conversion in the darker shades. I have also come across some pale blue ones which I think were used for some of the older B/W emulsions. Aren't they also used for skin tones in mono?
Kim
Kim
oftheherd
Veteran
I have a Kenko that says it is a PO1. But it's green. Sorry. 😀
back alley
IMAGES
is this a mystery?
VictorM.
Well-known
So I went through The Literature. In the Focal Press 'Leica Guide' (1952), on page 89: "BLUE FILTERS are for panchromatic film in artificial light. They absorb part of the red sensitivity. This results in better skin tones and darker reds (lips)." Also, in the Leica Manual (1951), the authors point out that with Type B panchromatic film and tungsten light, a green filter, Wratten X1, is recommended to adjust skin tones to normal. Some panchro films, DuPont, can be considered Type C, and are more red sensitive, needing a Wratten X2 filter. The Wratten X1 and X2 filters are green. This may mean that a POB is a POrtrait Blue and PO1 is a POrtrait X1.
Makes sense to me.
Makes sense to me.
back alley
IMAGES
and the mystery is solved!
many thanks victor.
so, now that it's all clear, anyone have some dupont film in the freezer and have ya just been waiting for one of these filters to pop up?
i have one in very good condition for sale.
and even though it's a collector's item now, it's priced very reasonably...😉
joe
many thanks victor.
so, now that it's all clear, anyone have some dupont film in the freezer and have ya just been waiting for one of these filters to pop up?
i have one in very good condition for sale.
and even though it's a collector's item now, it's priced very reasonably...😉
joe
VictorM.
Well-known
No! Buy mine. It's a Kenko to fit Summitar. And it has a black paint mount! Wow! It doesn't get any better than this! And the glass is Mint-! Unfortunately, it doesn't have a Hermes leather case yet. But when it does, look out!; the price is going higher than...whatever.
back alley
IMAGES
mine is 40mm...buy both!!
