Andrey Vorobyov
25-Jan-2011, 11:12
Are there any rules that govern the iris placement along the lens axis?
If the iris is placed too far, it acts rather as a vignetter rather than as an aperture. On the other side, telephoto lenses have rear node outside the lens but the iris is inside of course.
Is there a "correct" position for the iris and what are the reasons?
Thanks
Andrey
If the iris is placed too far, it acts rather as a vignetter rather than as an aperture. On the other side, telephoto lenses have rear node outside the lens but the iris is inside of course.
Is there a "correct" position for the iris and what are the reasons?
Thanks
Andrey