Marumi Macro Achro 200 + 5 Filter DHG 52 mm

It is made of tempered glass and has a multiple coating. This makes the lens moisture, scratch and dirty resistant. The macro Achromatic supply lens shortens the focal length, so that you can photograph your camera closer to objects. Ideal for close-ups and product photography. The high ring prevents unwanted light and reflection. In comparison with non-ACHRomatic supply lenses (normal macro filters), this DHG (Digital High Grade) offers achromatic supply lens a raised sharpness and extra detail with difficult objects, such as glass and jewelry. An extension of the exposure time is not necessary.

Possibilities

Explanation DHG Macro Achromatic Supplementary Lens +5
The strength of an Achromatic supply lens is specified in Dioptries, so in this case +5. With the following formula you can calculate how to reduce the minimum focal length with a certain macro or close-up filter.

This formula is:
X: (D * x + 1)

Here, X is the minimum focal length of your lens in meters, and the dioptrie number on the close-up lens.

Just a calculation example:
You have an objective that can focus from 55 centimeters and you use this close-up filter with a dioptrie of +5. In this case the calculation is:
0.55: (5 * 0.55 + 1) And this is the same as
0.55: (2.75 + 1) or
0.55: 3.75 = 0.146 meters, so 14.6 centimeters