Re: bellows extension

----- Original Message -----
From: "Shannon Stoney" <sstoney@pdq.net>
Subject: Re: bellows extension

>
> The 90mm lens I am using now (thanks, Clay!) is 3.5". So if it's racked
> out to 7", that's two stops I guess. Somewhere in between would be about 5
> 1/4", which would be one stop. I guess you could mark all these places on
> your camera.
>
> --shannon

No. That would be one stop. One click on the diopter ring, actually . . .
the ratio is 4=one stop or two times the distance equals one click, which is
actually a half of a stop.

S.

The way to find infinity (the nodal point of the lens) is to measure the
'nearest infinity' which is usually 30 feet.
Received on Fri Dec 2 13:04:41 2005