schwarzschild all nur zeiten .pdf
File information
Original filename: schwarzschild all nur zeiten.pdf
This PDF 1.5 document has been generated by cairo 1.10.2 (http://cairographics.org), and has been sent on pdf-archive.com on 12/02/2013 at 16:07, from IP address 77.117.x.x.
The current document download page has been viewed 3346 times.
File size: 117 KB (1 page).
Privacy: public file
Share on social networks
Link to this file download page
Document preview
Schwarzschild effect compensation
for different photographic materials
For most photographic materials, reciprocity is valid with good accuracy over a range of values
of exposure duration, but becomes increasingly inaccurate as we depart from this range: the
Schwarzschild effect. As the light level decreases out of the reciprocity range, the increase in
duration, and hence of total exposure, required to produce an equivalent response becomes
higher than the formula states; for instance, at half of the light required for a normal exposure,
the duration must be more than doubled for the same result. (http://en.wikipedia.org/wiki/
Reciprocity)
corrected exposure time [sec]
10000
1000
100
10
1
Tmax 100
Tmax 400
NEOPAN
1
10
Ilford
TriX 400
BW400CN
AGFA APX
ADOX CHS
Fomapan 100
Fomapan 200
Fomapan 400
100
1000
measured exposure time [sec]
Figure 1: Corrected exposure time values to compensate the Schwarzschildeffect for different
photographic materials
Data aquired by ILFORD, FUJIFILM, KODAK,
ADOX and FOMA photo fact sheets and websites
licensed under creative commons cc-by-nd
www.flickr.com/lennox_mcdough

Link to this page
Permanent link
Use the permanent link to the download page to share your document on Facebook, Twitter, LinkedIn, or directly with a contact by e-Mail, Messenger, Whatsapp, Line..
Short link
Use the short link to share your document on Twitter or by text message (SMS)
HTML Code
Copy the following HTML code to share your document on a Website or Blog