New RETROPAN 320 soft

[Gary Tarbert]

Oh and yes same thing reciprocity and Schwartzchild one and the same principle but karl Schwartzchild modernised if you wish the principle in about 1900 . Cheers gary

[Philippe Grunchec]

Schwarzschild!

[Gary Tarbert]

OOPS put a T IN WHERE NOT REQUIRED !

[HCST]

http://foma-cz.cs4.cstech.cz/en/cata...er-detail-1764

First pictures of the format 5x7 (pictures by Foma):




(Pictures by Foma)

[Doremus Scudder]

Is Schwartzchild Effect the same as Reciprocity Characteristics?

Am I reading this correctly that for 1 second exposure you need to open up 1 stop AND extend the time by 1.5? And for 10 seconds you need to open up by 2.5 stops and add 6 times the exposure time?

Or am I totally confused? That's pretty extreme...

Yep, Schwarzschild Effect = Reciprocity Failure. Karl Schwarzschild was the German physicist who first described it in detail.

Reiciprocity correction tables are traditionally in "either/or" format, i.e., use this shutter-speed correction or open up this many stops.

The film looks interesting...

Doremus

[Tyler Boley]

http://www.filmsnotdead.com/2015/05/...opan-320-soft/

[Jac@stafford.net]

More posted a few days ago here.

[Tyler Boley]

thanks, I didn't see that, found this as a facebook post and thought it would be of interest. Good to know there's already some noise about it

[Oren Grad]

Threads merged.

[Andrew O'Neill]

These pics are interesting...

http://www.rangefinderforum.com/foru...d.php?t=127272