DSLRKIT Lente Enfoque Herramienta de Calibración Regla de Alineación Tarjeta Plegable Paquete de 2

Manufacturer DSLRKIT. It is an essential tool that is particularly useful when shooting with a shallow depth of field, where focusing should ideally be "spot on". Set up the ruler. Set the lens to the widest aperture to obtain the shallowest depth of field.

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