Blackmagic Design CINEURSAMWC6KG2 User Manual

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Shimming Lens Mounts

What is a Shim?

Shims are thin disks of varying thickness that let you make fine adjustments to the distance

between your lens and URSA Broadcast G2’s sensor. This distance is commonly known as the

flange focal distance, and can change slightly due to variables such as lens age and the

environmental conditions of your shoot.

URSA Broadcast G2 Shim

Shims are placed between the lens mount and the camera body so the distance from your

subject to the sensor matches the focus marks on your lens. These are most commonly used

forPL lenses. These cine lenses are manually focused and have very accurate focal distance

markings on their barrels. Shims are also used for URSA Broadcast G2’s interchangeable

lens mount.

The Blackmagic URSA Mini Pro Shim Kit contains additional shim sets of various thicknesses,

and can be purchased from your local Blackmagic Design reseller. A set of shims is also

included with all mount kits and are compatible with URSA Broadcast G2. Use shim thicknesses

depending on your back focus requirements.

Blackmagic URSA Mini Pro Shim Kit

Your URSA Broadcast G2 camera ships with two shims, a 0.10mm plastic shim and a 0.50mm

metal shim. These shims set the proper focal distance for your URSA Broadcast G2 camera’s

B4, EF, and F mount lenses. Very occasionally, you will need to use additional shims

to suit PLlenses that require very specific clearances to maintain accurate focus marks.

Blackmagic URSAMini Pro Shim Kit includes the following additional tools. Other thicknesses

are included in the kit in case you need to re-shim your camera to suit PL lenses that may

require slightly different clearances to maintain accurate focus marks.

The shim kit includes:

1x Baffle tool

Use the baffle tool to loosen or tighten the PL baffle when removing

or attaching the PL mount to your URSA Broadcast G2.

1 x Shim set

The shim set includes the following thicknesses:

0.50mm

0.30mm

0.20mm

0.18mm

0.15mm

0.12mm

0.10mm

0.05mm

0.025mm

200Shimming Lens Mounts

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Blackmagic Design CINEURSAMWC6KG2 URSA Broadcast G2 Camera