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Lens Accessories - Centre Filters

Rodenstock Centre Filters- Analogue

Further Information
A centre filter is a circular graduated filter, with a dark spot at the centre that lessens in density to a completely clear part at the edge. They have stepped mounts to a larger filter thread to avoid vignetting.
For critical shots (e.g. with areas of uniform brightness towards
the image corners) the physically inevitable light fall-off
according to the “cos4 law” can be eliminated by using the
neutral gray Rodenstock center filters available for all Apo-
Grandagon and Grandagon-N lenses (see table). A center filter
should always be used if the image circle of a wide angle lens
is used right up to the vicinity of the circumference.
Rodenstock center filters are concentric graduated neutral
gray filters whose density decreases from the center up to the
transparent rim. The fall in density compensates for practically
all the light fall-off to the image edge from a working f-stop
of 16. The exposure must be corrected by 1.5 or 2.5 stops. This
corresponds to a correction of the exposure time by a factor of
3 or 5 respectively (either aperture or exposure time have to be
corrected, not both at the same time).
Apo-Grandagon Filter thread Exp. correction
& Grandagon-N f-stops / time
35 mm f/4.5 E 67/86 +2.5 5×
45 mm f/4.5 E 67/86 +2.5 5×
55 mm f/4.5 E 67/86 +2.5 5×
65 mm f/4.5 E 58/77 +1.5 3×
75 mm f/6.8 * E 58/77 +1.5 3×
75 mm f/4.5 E 67/86 +1.5 3×
90 mm f/6.8 E 67/86 +1.5 3×
90 mm f/4.5 E 82/112 +1.5 3×
115 mm f/6.8 * E 82/112 +1.5 3×
* This lens is no longer produced; however, the matching center
filter is still available for later completion
Ø = M 67 for Grandagon & Apo Sironar Digitals
£525.00
VIEW
Ø = M 58 for Grandagon- N LIMITED STOCK
£345.00
VIEW
Ø = M 82 for Grandagon- N LIMITED STOCK
£495.00
VIEW
Ø = M 67 for Grandagon- N - NO LONGER AVAILABLE
VIEW
Rodenstock Centre Filters- Digital
Ø = M 72 for HR Digaron S 4.5/ 23mm + 4.5/ 28mm
£650.00
VIEW
Ø = M 86 for HR Digaron W 4/ 32mm -
£745.00
VIEW
Ø = M 67 for Grandagon & Apo Sironar Digitals
£525.00
VIEW
Schneider Centre Filters- Analogue
Ø = M 72 IIA for Super Angulon 5.6/ 38 XL - IN STOCK
£345.00
VIEW
Ø = M 67 III for Super Angulon 5.6/ 65 + 75 IN STOCK
£375.00
VIEW
Ø = M 82 IV for S/Angulon f5.6 90 + SA 8/ 120 IN STOCK
£399.00
VIEW
Ø = M 82 IIID for Super Angulon Classic 6.8/ 90 - ENQUIRE
VIEW
Ø = M 95 IVa for SA XL 90 /72 & 150 S/Sym XL NO LONGER AVAILABLE
VIEW
Ø = M 135 VI for Super Symmar 5.6/ 210 XL NO LONGER AVAILABLE
VIEW
Ø = M 95 IVB for Super Angulon 5.6/ 72 XL - NO LONGER AVAILABLE
VIEW
Ø = M 67 IIIB for Super Angulon 5.6/ 58 XL + SA 8/ 90 NO LONGER AVAILABLE
VIEW
Ø = M 67 IIIC for Super Angulon 5.6/ 47 XL - NO LONGER AVAILABLE
VIEW
Schneider Centre Filters- Digital
Ø = M 52 II for Apo Digitar 5.6/ 47 XL - IN STOCK
£345.00
VIEW
Ø = M 52 IIF for Apo Digitar 5.6/ 35 XL - IN STOCK
£365.00
VIEW
Ø = M IIh for Apo Digitar 5.6/ 60 XL NO LONGER AVAILABLE
VIEW
Ø = M 58 IIi for Apo Digitar 5.6/ 43 XL - NO LONGER AVAILABLE
VIEW
Ø = M IVD for Super Digitar 5.6/ 28 XL NO LONGER AVAILABLE
VIEW