Vignette Problem DIY Fix using Back Focus Correction...?

Wayne Orr · March 18th, 2008, 07:29 PM

With professional lens, to back focus properly, you want to open the lens full wide with the iris. Does the EX do this as part of the routine described? If not, you might want to do this before running the program.

If you back focus at say, F/8, you could be in for a nasty surprise when you go to shoot wide open. Give it a try.

Wayne Orr, SOC

Gerald Loidl · March 19th, 2008, 02:04 AM

of course I always did the adjustment with wide open aperture.
thanks,
Gerald

March 18th, 2008, 07:29 PM	#16
Wayne Orr Major Player Join Date: Dec 2002 Location: Northridge Ca Posts: 734	Wide Open? With professional lens, to back focus properly, you want to open the lens full wide with the iris. Does the EX do this as part of the routine described? If not, you might want to do this before running the program. If you back focus at say, F/8, you could be in for a nasty surprise when you go to shoot wide open. Give it a try. Wayne Orr, SOC

March 19th, 2008, 02:04 AM	#17
Gerald Loidl Regular Crew Join Date: Feb 2008 Location: Austria Posts: 122	of course I always did the adjustment with wide open aperture. thanks, Gerald