Hello, All,

Some years back, I invested in a round center filter with an 82 mm diameter...but didn't really find THAT much need for it with 4x5. (...laziness, i guess).

I just ordered the Shen-Hao 617 Bellows camera, and am expecting the larger 617 film diameter will necessitate the center filter with wider lenses.

QUESTION: Given a center filter with an 82 mm diameter, should I adjust the distance of the filter itself from the lens surface, so that each lens "Angle of View" almost reaches the 82 mm filter diameter, without vignetting? (Center filters are expensive, so I just want to use the one.)

REASON: I purchased various filter step-down rings, to adjust the distance of the center filter from the front glass of my used 4x5 lenses, thinking that the angles of view of a 67 mm, or a 90 mm, or a 120 macro would each be different...and would therefore necessitate different placement of the center filter. (...obviously the 617 film plane will come closer to the Image Circle limits of each lens.)

...Hopefully, I have made myself clear...not having a picture to draw.

Thank you in advance for your help!

Robt.
Dallas