Archived posting to the Leica Users Group, 1998/07/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The M4 itself, is not cognizant of ISO. It's how you personally set the f/stop and shutter for a particular photograph using a particular film. ISO is a film speed and is used to set light meters so that they will give the proper exposure for a particular film. If your M4 has a meter on the top, simply adjust the ISO/ASA/DIN (whatever is says) to a higher value. ISO 100 to 200, DIN 24 to 27, is one stop (push 1.) 100 to 400 (DIN 24 to 30) is a two stop push. If you are using a separate hand held meter, do the same. If you are using the information from inside a film box, to boost one stop, use one higher shutter speed or one smaller f/stop, ei; 1/125 to 1/250 OR f/8 to f/11 (not both, for one stop). Two stops push should be self explanatory. Two of either or one of both. You then have to process the film appropriately. You'll have to process the film yourself (increase the developer time accordingly) or use a pro/commercial lab and tell them how many stops you've pushed the film. They'll know what to do. Fuji MS100/1000 film lists the first developer time for various pushes on the film box & cartridge. I don't understand the "elevtronically vs. mechanically" statement? Jim At 05:02 PM 7/17/98 +0200, Francisco.ACOSTA@DG3.cec.be wrote: >Friends, >Sorry for the basic question but I'd just like to know how the heck can I push up the ISO in my M4... I'm used to do it electronically (Japan...). But, manually? >TIA, >Francisco > Jim Brick (650) 470-1132 http://www.photoaccess.com