on Oct 19, 2016 13:42:57 GMT
This lens is an absolute gem. It is not quite a match for the Zeiss 16mm Fish-eye but is a very good performer indeed!
The photos show how the Filtermatic element works; the lens comes with a 'Normal' filter installed and additionally has 4 other filters: ND4x, Y52, O56 and R60. The front assembly unlocks and the required filter is then screwed into the rear section of the lens and the front section then re-attached. It is less efficient than Zeiss' provision of internal filters and can introduce unwanted dust into the lens but you are not paying 500% more for that privilege. Also, the Zeiss fails to offer a ND filter and as you can't attach external filters to the Distagon, you end up having to waft a large ND square filter in front of the lens which is a pain...
If you can find one in good condition and you want the creativity of a fish-eye but can't justify the cost of ML 15mm or Zeiss 16mm, this lens will do you proud.