Luminous Landscape Forum

Equipment & Techniques => For Sale => Topic started by: Ziggy on August 14, 2013, 10:45:59 am

Title: fs B+W 120 Filter 77mm
Post by: Ziggy on August 14, 2013, 10:45:59 am
Selling my B+W 120 Filter, it's a 20 Stop ND filter, 77mm size.  Just looked over by Schneider Optics, few small scratches, but they said it looks good. 

Film shooters only, doesn't work with Digital.  hence why I am selling it.

$200 includes shipping OBO
Title: Re: fs B+W 120 Filter 77mm
Post by: Neil Folberg on August 14, 2013, 04:01:21 pm
Why would this only be for film? I don't understand.
Title: Re: fs B+W 120 Filter 77mm
Post by: Ziggy on August 14, 2013, 05:36:23 pm
it doesn't work with a digital camera.  And before you ask me why.  I don't know, but I sent it to Schneider Optics and they don't know why it doesn't work with digital, but it doesn't.  Works as normal with Film
Title: Re: fs B+W 120 Filter 77mm
Post by: Sheldon N on August 15, 2013, 01:46:01 pm
Quote from: Neil Folberg on August 14, 2013, 04:01:21 pm
Why would this only be for film? I don't understand.

20 stops is crazy dark. The light level is probably just too low for a digital sensor to effectively register, even with a long exposure.

For example, sunny f/16 at ISO 100 translates into a roughly 2 hour exposure in broad daylight/direct sun.