by Mike McNamee Published 01/02/2017
SRB have been operating for 50 years this year. Your editor has been using them for a good chunk of that time having started well back into the mid-70s with microscope adaptors. The company has a well-deserved reputation for its engineering and so we were keen to handle this latest filter system.
The design is unique (we think!) in that it has the usual square filter slots (two) but now contains an additional recessed slot for a circular filter to be fitted. Now for the clever bit – the circular filter may be rotated independently of the square filters! (The small knurled rotation wheels are arrowed in the picture below which also shows the carry case.) At a stroke this makes it possible to combine a rotatable polariser with a graduated ND filter or one of the high-density stopper filters.
Additionally the 10- and 6-stop ND filters are also available in circular format and the closeness of the recessing removes the need for a felt light sealer strip (which is always a liability in the field with dust and rain). Thus if you wish to use a polariser and an ND filter then the ND must be the regular P-format (nominally 84x95mm). The cost of the filters is very competitive (see the table and www.srb-photogrpahic. co.uk).
This itself is important because many landscape photographers pack half-a-dozen or so filters and this represent a relatively small outlay.
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