Typically, when we extend the bellows of the camera to a point where it exceeds the focal length of the attached lens, we may have to take into account light loss hitting the film.
To compensate for this, we need to add a certain amount of exposure compensation to the metered exposure time. The amount of compensation depends on how far the bellows have been extended and the focal length of the attached lens. One point to take into consideration is that you will still need to factor in any additional exposure times should you have filters attached to the lens.
Ok, so now I know the amount of bellows draw and the focal length, how do I workout the amount of extra exposure I need ?.
This is where the Bellows Draw Exposure Compensation Windows desktop program can help.
Simply enter the amount of bellows extension draw you have, the focal length of the lens you are using and press the calculate button.
The program is shareware which means it can be tried free of charge on a trial basis. It can be downloaded FREE, direct from the online store. To register the program and remove the trial functionality, a serial number can be purchased direct from the online store.
- Windows 7 and above operating system
- Microsoft .Net Framework 4.5 (will be installed if you do not have it)
- Live Internet connection to retrieve free product updates