Adjust FD lens F-stop at DVinfo.net

Justin Watanabe · August 4th, 2006, 09:22 PM

Hi,

Just checking with the people who used Canon FD lenses, how do you change the Fstop on the lens without depressing the lever at the lens rear?
I know the FD lenses needs to rotate the rear mount area in order to be able to change the Fstop, but without depressing the lever the lens reamin full opened, any advice?
Thank you
Justin

Tucker Wright · August 4th, 2006, 10:20 PM

Quyen sent me this link and gave me instructions on how to make this work.

http://www.letus35.com/type1.JPG

Slide the lever in the image above and and use a tooth pick or stiff piece of wire to hold the lever in place. That's how I got my lens to work correctly.

Justin Watanabe · August 6th, 2006, 08:56 AM

Quote:

Originally Posted by Tucker Wright

Quyen sent me this link and gave me instructions on how to make this work.

http://www.letus35.com/type1.JPG

Slide the lever in the image above and and use a tooth pick or stiff piece of wire to hold the lever in place. That's how I got my lens to work correctly.

Thanks, i tot there will be some other way....ive a lovely Canon 85mm 1.2L which im dying to use.....

Anyway, on a side note, i recently tried a Nikon AIS 85mm F2... it was really good...its pretty cheap too....

Justine Haupt · August 6th, 2006, 09:33 AM

You can also do it by starting to take the lens off the mount... that might sound strange, but if you're using the type of FD lens where the entire lens rotates onto the mount (not just that separate ring that rotates), than you can see the iris open and close as you attach the lens. You can't tell how much you're stopping the lens, but if you depress the lens release button and just rotate it part of the way to take it off, than that adjusts the iris.

Devon Lyon · August 6th, 2006, 09:15 PM

I currently own the LetusXL Enhanced and the beta before that and use Canon FD mount lenses. A toothpick with a little piece of black electrical tape cut to only cover the pick works perfectly. No problems yet.

Justin Watanabe · August 7th, 2006, 10:38 AM

Thanks all for the replies.....

Oh, ive swapped the screen with a nikon D100...im using the Letus flip 1st gen....using the Nikon i think the F-stop went down by one...much shaper as well, less graint too...thanks Ben Winter

August 4th, 2006, 09:22 PM	#1
Justin Watanabe New Boot Join Date: Jun 2006 Location: singapore Posts: 5	Adjust FD lens F-stop Hi, Just checking with the people who used Canon FD lenses, how do you change the Fstop on the lens without depressing the lever at the lens rear? I know the FD lenses needs to rotate the rear mount area in order to be able to change the Fstop, but without depressing the lever the lens reamin full opened, any advice? Thank you Justin

August 4th, 2006, 10:20 PM	#2
Tucker Wright Regular Crew Join Date: May 2006 Location: Reston, Virginia Posts: 52	Shim the lens Quyen sent me this link and gave me instructions on how to make this work. http://www.letus35.com/type1.JPG Slide the lever in the image above and and use a tooth pick or stiff piece of wire to hold the lever in place. That's how I got my lens to work correctly.

August 6th, 2006, 09:33 AM	#4
Justine Haupt Major Player Join Date: Oct 2005 Location: Long Island, NY Posts: 208	You can also do it by starting to take the lens off the mount... that might sound strange, but if you're using the type of FD lens where the entire lens rotates onto the mount (not just that separate ring that rotates), than you can see the iris open and close as you attach the lens. You can't tell how much you're stopping the lens, but if you depress the lens release button and just rotate it part of the way to take it off, than that adjusts the iris. __________________ ~Justine "We are the music makers, and we are the dreamers of dreams" -Arthur O'Shaunessey (as quoted by Willy Wonka)

August 6th, 2006, 09:15 PM	#5
Devon Lyon Major Player Join Date: May 2005 Location: Oregon Posts: 213	I currently own the LetusXL Enhanced and the beta before that and use Canon FD mount lenses. A toothpick with a little piece of black electrical tape cut to only cover the pick works perfectly. No problems yet. __________________ Lyon Films www.LyonFilms.com;

August 7th, 2006, 10:38 AM	#6
Justin Watanabe New Boot Join Date: Jun 2006 Location: singapore Posts: 5	Fd Thanks all for the replies..... Oh, ive swapped the screen with a nikon D100...im using the Letus flip 1st gen....using the Nikon i think the F-stop went down by one...much shaper as well, less graint too...thanks Ben Winter