SKU: 24460379737

Blackmagic Design PL Mount Shim Kit

Sale price$585.81 Regular price$650.90
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Description

Blackmagic Design PL Mount Shim KitBlackmagic Design PL Mount Shim Kit The Blackmagic Design PL Mount Shim Kit is a critical technical accessory for cinematographers using the URSA, URSA Mini, URSA Mini Pro, or URSA Broadcast cameras. This kit is used to precisely calibrate the flange focal distance (the distance between the lens mount and the camera sensor), a process commonly referred to as "shimming" the mount. Purpose and Functionality In professional cinematography, focus marks on

Blackmagic Design PL Mount Shim Kit

The Blackmagic Design PL Mount Shim Kit is a critical technical accessory for cinematographers using the URSA, URSA Mini, URSA Mini Pro, or URSA Broadcast cameras. This kit is used to precisely calibrate the flange focal distance (the distance between the lens mount and the camera sensor), a process commonly referred to as "shimming" the mount.

Purpose and Functionality

In professional cinematography, focus marks on a lens must be accurate. If the distance between the lens and the sensor is off by even a fraction of a millimeter, the lens may not hit "infinity focus" correctly, or its focus scales may become unreliable.

  • Back Focus Calibration: Shims are used to adjust the camera's back focus to compensate for manufacturing tolerances in either the camera body or the specific PL-mount lenses being used.

  • Ensuring Lens Accuracy: By adding or removing shims, you ensure that a lens focused at 10 feet on the barrel is actually focused at exactly 10 feet on the sensor.

Kit Contents

The kit typically includes a selection of ultra-thin, color-coded rings that are placed behind the lens mount.

  • Set of 8 Shims: The kit contains multiple shims of varying thicknesses, allowing you to stack them to achieve a specific total thickness.

  • Baffle Tool: Some versions of the kit include a specialized tool to help remove the internal light baffle or the lens mount assembly without damaging the sensor's glass.

  • Color-Coding: Each shim is color-coded (often in shades like tan, red, or clear) to represent a specific thickness in millimeters, making it easier to track adjustments.

Compatibility

This kit is specifically designed for the interchangeable lens mount system found on Blackmagic’s high-end cinema cameras:

  • URSA Mini Pro (4.6K, G1, G2, 12K): Essential when swapping from the default EF mount to the optional PL mount.

  • URSA Broadcast G2: Critical for ensuring cinema PL glass performs correctly on the broadcast sensor.

  • Blackmagic Cinema Camera 6K (L-Mount): While the camera uses L-Mount, users who utilize the Blackmagic PL Mount adapter may require shims to ensure that adapted PL lenses maintain proper infinity focus.

How to Use the Kit

Shimming is a delicate process that should be performed in a clean, dust-free environment.

  1. Mount Removal: Use a 2.0mm hex key to remove the screws holding the existing lens mount onto the camera body.

  2. Placement: Place the desired shim (or combination of shims) onto the camera body, ensuring they sit flat against the mounting surface.

  3. Reassembly: Re-attach the PL mount and tighten the screws in a "star pattern" to ensure even pressure.

  4. Testing: Mount a wide-angle lens, set it to infinity, and check the image on a high-resolution monitor or using the camera’s focus peaking tool. If infinity focus is not achieved, the shim thickness must be adjusted.

Operational Insight

For rental houses and professional DPs, shimming is a standard part of "camera prep." Because temperature changes and physical wear can slightly shift a camera's flange distance over time, having a shim kit on hand is vital for maintaining professional standards. It is often recommended to use a Siemens Star chart or a Projector during this process to verify that the focus is sharp across the entire frame.

Shipping Notes
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Exchange/Return Notes
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SKU: 24460379737

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4.2 ★★★★★
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DuLCe
Massapequa, US
★★★★★ 5
Absolutely perfect
Color: Pink, Size: 23.8''D x 22.3''W*38.4''H
Love the color and it’s very comfortable. I can also use an additional back rest when needed. It’s small enough for my limited work space, but large enough to accommodate my height requirements. It was quite easy to assemble, as I frequently put furniture together. I’ve had it for about a month and I’m hoping that it lasts a good while.
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Reviewed in the United States on May 15, 2026
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Verified Purchase
astfgl
Massapequa, US
★★★★★ 5
Good, cheap, small.
Color: Black, Size: 21.7''D x 21.7''W*38.2''H
The quality is better than expected for the price. Seat cushion is firm but not overly hard, wheels roll nicely, piston goes up and down smoothly, and assembly is quick and easy. The one major caveat is that it's quite small. If the user is going to be maybe 5'4 or less, it'll work (this was for a child, so it turned out great). But even on a 5'6 user, the seat is rather shallow (front to back) and the armrests are so low that your elbows won't reach unless you have freakishly long arms. If you're after a cheap office chair for brief adult use, or for kids, this is perfect. I don't know how they turn a profit given that it's a fully functional office chair, shipped from China to your doorstep, for only $30. However, if you're of average height or bigger, it's probably going to be too small for you.
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Reviewed in the United States on April 27, 2026
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Verified Purchase
Jose Gabriel
Cuba, US
★★★★★ 5
Affordable great product
Color: Black, Size: 21.7''D x 21.7''W*38.2''H
Easy to assemble and comfortable
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Reviewed in the United States on June 4, 2026
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Amazon Customer
Lexington, US
★★★★★ 1
I regret
Color: Black, Size: 21.7''D x 21.7''W*38.2''H
A very uncomfortable chair that I owned for less than a month. The seat was broken and the particle board appeared old and reused, it was an oddly painted piece of material. It looked like someone ripped down the wall of a shack and made it the chair seat base. The seat was unstable due to the large crack throughout the entire piece of board. I am not sure how it could be returned since it is near impossible to remove the seat from the base once it is assembled. A terrible purchase that I regret. I know it is low cost, but I would suggest spending slightly more for another chair. I had to order a new chair that was only slightly more expensive so I could sit down.
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Reviewed in the United States on May 12, 2026
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BobbieAnn
Houston, US
★★★★★ 5
Wonderful product
Color: Brown, Number of Items: 1, Color: Brown, Number of Items: 1
This chair offers good lumbar support and a well-padded seat. It has a very nice and smooth rocking motion, you can loosen the tight/loose knob for reclining, and it is very comfortable to sit in while working on the computer or relaxing to watch TV. The back of the chair hits just above my neck, so the back of my head rests comfortably on the top of the chair. The color, brown, is exactly what I expected and looks professional. The height adjustment works well, it sits higher than my old chair, and I like that. It seems sturdy for the 300-pound weight recommended. I got it on Prime Day, so it was a good value for the money. It came packed well and quicker than expected. The pictures are a comparison to my 20-year-old office chair. Assembling the chair was easy, however, be sure to attach the bottom part of the chair with the tight/loose knob facing the front of the chair. It's not clearly marked on the instructions. When it came time to put the back of the chair on it would be good to have another person to hold the chair back for you to align the chair arm holes and screw in, then you should be OK but I did discover that if I had attached the arms to the back of the chair first, it would be so much easier to align them for attachment. The wheels glide very easily and will take you across the room after one push. It swivels at 360 degrees easily, almost making me dizzy. I am writing this review the same day I got the chair so I will update if I run into any issues. Otherwise, I recommend this chair.
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Reviewed in the United States on July 17, 2025

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