Orange filter for B/W

[ramiro_aceves]

Hello B&W fans

 

I am starting to play with filters and I have just receive an HOYA

ORANGE (G) filter from my photo dealer, but there is not spectral

response data inside the box. Could you tell me where can I find the

data of this filter or what is its Kodak equivalent?. I have searched

in the web for HOYA filters and I can not get the spectral response

datasheet.

 

Watching trough the filter I can see clearly that it darkens the

violets and blues, leaving greens, yellows and reds unaffected. I

thought an orange filter would darken also the greens, but this is

not the case. I have some Pentax filters spectral response data and

it should correspond more exactly to a dark yelow (Y2 (Y48) in Pentax

nomenclature).

 

Also, if I watch my monitor in Photoshop trough the filter, I can

test where the filter starts to "cut the waveleghts". I do not know

if this tests I have done are reliable or not.

 

Any information will be valuable for me.

Thanks

[maury_cohen]

The Orange filter effects tones about midway between a Red and Yellow flter. Sky will be darkened more than with Yellow, less than with Red.

[ken_burns1]

The Hoya G is approximately equal to the Wratten #15.