Blackmagic URSA mini Pro 12K installation test

We are often asked about the installation of the Blackmagic URSA mini Pro 12K and Entaniya Fisheye HAL series.

Information about the possibility of installation.

Installation of Blackmagic URSA mini Pro 12K and Entaniya Fisheye HAL series

OLPF and protrusion at the rear of the lens

Several of the lenses in the Entaniya Fisheye HAL series have the lens protruding further back than the mount.

Therefore, the lens has to be attached by inserting the back part of the lens inside the camera.

When trying to attach the lens to the camera, the rear of the lens may interfere with the OLPF or light-shielding cup inside the camera.

Since different lenses have different sizes, we verified the results with each lens.

The two sizes will be the key.

Size A

The length of the protrusion from the mount to the back of the lens (A) and from the mount to the OLPF (A’)

If the length of A is longer than A’, the back of the lens will interfere with the OLPF and the lens cannot be installed.

However, removing the OLPF will leave a margin of about 1mm, which may allow for installation.
Removing the OLPF is not recommended by the manufacturer because it may cause dust to get inside the camera and change its color.

SizeB

Outer diameter of the rear part of the lens (B) and inner diameter of the light-shielding cup inside the camera (B’)

If the length of the lens is longer than B’, the back of the lens will interfere with the light-shielding cup inside the camera and the lens cannot be installed.
However, it may be possible to install it by removing the light-shielding cup.

Availability of installation

HAL250 EF 4.3

Since the protrusion behind the lens is 29.1mm, it interferes with the OLPF and cannot be installed.
However, it can be installed by removing the OLPF.
Also, since the outer diameter of the rear part of the lens is larger than the light-shielding cup, the light-shielding cup must also be removed.

HAL250 EF 6.0

Since the outer diameter of the rear part of the lens is larger than the light-shielding cup, the light-shielding cup must also be removed.
The OLPF does not need to be removed.

HAL200 EF 6.0

Since the protrusion behind the lens is 28.27mm, it interferes with the OLPF and cannot be installed.
However, it can be installed by removing the OLPF.
Also, since the outer diameter of the rear part of the lens is larger than the light-shielding cup, the light-shielding cup must also be removed.

HAL220 PL

The protrusion behind the lens is 35.7mm, so it can be installed without removing the OLPF.
However, the clearance at the point of focus is only 0.3 mm, so care must be taken when focusing.
Also, since the outer diameter of the rear part of the lens is larger than the light-shielding cup, the light-shielding cup must be removed.

HAL220 LF

It can be mounted just like a normal lens.

TIPS

Removal of the shading cup and OLPF

The above video will be helpful for removing the light shielding cup and OLPF inside the camera.
The camera in the video is a URSA Mini Pro 4.6k, so the internal structure is a bit different from the 12k, but the basic parts are the same.

About Focus Adjustment

Since the Blackmagic URSA mini Pro 12K is a camera that can shoot soft images, it is difficult to check the focus. When focusing, “output to a large monitor to check” or “use a focus chart to check” to get a sharper image.

Reference Focus chart.