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Lens Accessories - Centre Filters

          

When working with wide angle lenses, fall off of illumination towards the corners is sometimes noticable.

For this reason, concentrically graduated Center Filters have been designed to compensate for this vignetting. 

 
Rodenstock Centre Filters- Analogue

Code excl. VAT Advice List  
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
= M 58 for Grandagon- N - LIMITED STOCK
This centre filter is in stock but is now discontinued at the factory.
4.5/ 65 + 6.8/ 75 filter thread 77mm, 1.5 stops.
22292
£275.00
= M 82 for Grandagon- N - IN STOCK
4.5/ 90 + 6.8/ 115 filter thread 112mm, 1.5 stops.
22291
£395.00
= M 67 for Grandagon- A
4.5/ 35/ 45/ 55 filter thread 86mm, 2.5 stops.
22301
£495.00
= M 67 for Grandagon- N - DISCONTINUED
4.5/ 75 + 6.8/ 90 filter thread 86mm, 1.5 stops.
22306
£0.00
Rodenstock Centre Filters- Digital Code excl. VAT Advice List  
= M 72 for HR Digaron S 4.5/ 23mm + 4.5/ 28mm
Filter thread is 72mm stepped out to 95mm.
22286
£595.00
= M 86 for HR Digaron W 4/ 32mm -
Filter thread is 86mm stepped out to 105mm. Fall off correction: 2.5 f stops.
22287
£675.00
Schneider Centre Filters- Analogue Code excl. VAT Advice List  
= M 95 IVa for Super Angulon 5.6/ 90 /72 & 150 XL XL +150 XL
IN STOCK
Filter thread 112mm, 1.5 stops.
Schneider Product Code 10591
22283
£425.00
= M 95 IVB for Super Angulon 5.6/ 72 XL
Discontinued. No Longer Available.
THE CENTRE FILTER IVa ABOVE CAN BE USED FOR THE 72mm XL AND WILL GIVE 1.5 f STOPS INSTEAD OF 2 f STOPS.
Filter thread 112mm, 2 stops.
Schneider Product Code 25638
22302
£0.00
= M 82 IV for Super Angulon 5.6/ 90 + SA 8/ 120
IN STOCK
Filter thread front 105mm. 1.5 f stops
Schneider Product Code 10599
10599
£399.00
= M 135 VI for Super Symmar 5.6/ 210 XL -

Filter thread 152mm, 1.5 stops.
Schneider Product Code 10593
22284
£775.00
= M 67 IIIB for Super Angulon 5.6/ 58 XL + SA 8/ 90
IN STOCK
Also for Super Symmar 4.5/ 80 XL / Super Symmar 5.6/ 110 XL and 47mm Super Angulon XL- filter thread 86mm, 1.5 stops.
Schneider Product Code 10590
22282
£325.00
= M 67 III for Super Angulon 5.6/ 65 + 75 -
IN STOCK
Filter thread 86mm, 1.5 stops.
Schneider Product Code 10598
22140
£325.00
= M 67 IIIC for Super Angulon 5.6/ 47 XL - DISCONTINUED
PLEASE ENQUIRE FOR SUPPLY POSSIBILITIES
Filter thread 86mm, 2 stops.
Schneider Product Code 25637
22300
£0.00
= M 72 IIA for Super Angulon 5.6/ 38 XL - DISCONTINUED
PLEASE ENQUIRE FOR SUPPLY POSSIBILITIES
Filter thread 82mm, 1.5 stops.
Schneider Product Code 45385
22293
£0.00
= M 82 IIID for Super Angulon Classic 6.8/ 90 - DISCONTINUED
PLEASE ENQUIRE FOR SUPPLY POSSIBILITIES
Filter thread 95mm, 1.5 stops.
Schneider Product Code 28300
22305
£0.00
Schneider Centre Filters- Digital Code excl. VAT Advice List  
= M 58 IIi for Apo Digitar 5.6/ 43 XL - IN STOCK
Schneider Product Code 1069162
22280
£265.00
= M IIh for Apo Digitar 5.6/ 60 XL - IN STOCK
Schneider Product Code 1069161
22290
£265.00
= M 52 II for Apo Digitar 5.6/ 47 XL - IN STOCK
Schneider Product Code 16190
Step out to 67mm
16190
£265.00
= M 52 IIF for Apo Digitar 5.6/ 35 XL -IN STOCK
Schneider Product Code 1003286
22285
£265.00
= M 67 IIG SPECIAL for Apo Digitar 5.6/ 35 XL
IN STOCK
This is a center filter used to correct illumination falloff on the customized version of the Apo-Digitar XL 35mm extreme wide angle lens. The 2g mounts to the lens board/shutter housing, not to the front thread of the lens.

It has a filter factor of 4x in the center (2 stops) and is clear at the edges. The mounting thread is 67mm x 0.75 and additional filters can be attached in front, using the 72mm x 0.75 accessory thread.
Schneider Product Code 1003287
1003287
£279.00
= M IVD for Super Digitar 5.6/ 28 XL
Schneider Product Code 1069159
Please enquire
22289
£395.00