Rocky had brought his camera and lens (Leica M240, Leica 35 f/1.4 Sumilux ) to coffee with the following filter, the B+W 52mm Macro Close-up +2 NL2 attached. This filter helps you to produce macro style photography. Whenever integrated on a lens it can considerably narrow the depth of field and lower the minimum focusing distance of the lens.
- This filter cuts down the minimum focus distance of any sort of lens, providing macro-like results.
- Single anti-reflective coating aids to increase light transmission to over 98% while reducing reflections, flare, and ghosting.
- Built from high quality Schott glass for optical quality.
- A brass filter ring aids to prevent jamming and features additional durability.
This +1 close-up lens will assist you to focus the lens closer compared to how it does presently; a +2 close-up lens allows you to focus closer compared to a +1 and it goes on with other higher factors.
The maximum magnification produced can vary depending on the focal length of the lens in addition to the actual close focusing efficiency of the lens it´s connected to.
Each individual glass surface is vacuum covered with a layer of anti-reflection coating. This particular layer assists to avoid internal ghosting and reflections. Additionally, it elevates light transmission from approximately 92% (from uncoated glass) to above 98%.
Source (http://www.photo24.co.uk)(images- Simon Johnson)