Testing Film ISO & Development Time - Large Format Friday

The materials we use as photographers, especially in large format, vary from person to person. Getting repeatable results with so many variables to the process can be tricky. One way to help get a handle is testing your photographic films. Today I'm going to show you how to test B&W film in a large format camera to determine your personal film speed (ISO) and normal development time. -------------------------------------------- NEW LFF Channel Memberships - https://www.marrash.com/memberships -------------------------------------------- Alex Bond's Testing Procedure: https://www.alexbond.com.au/film-speed-test/ Paul Wainwright's Articles: http://www.paulwainwrightphotography.com/biblio_by_me.shtml Stouffer Step Wedges: http://stouffer.net/TransPage.htm -------------------------------------------- Support the Channel here: https://www.marrash.com/donate Questions? Send me an email: [email protected] Content by Mat Marrash: https://www.matmarrash.com #largeformat #filmphotography #darkroom 00:00 Intro 00:40 Why Test Film? 02:01 The Bond Method 03:00 Test Setup 05:08 Metering 07:05 Testing 09:31 Developing 11:12 Finding ISO 12:55 Min. Time, Max. Black 15:00 Finding Dev Time 16:38 Conclusions