Wimberley P20 User Manual

Wimberley, Inc. Phone: [phone]

1750 Broadway St Toll Free: 1-888-665-2746 (USA & Canada)
Charlottesville, VA
22902 USA www.tripodhead.com [e-mail]

Package Contents:

• Arca-Swiss Style Plate: P-20, 3.86 inches long (Qty 1)

• Mounting Screws: SW-100 — 1/4”-20 x 1/2” (Qty 2)

• Safety Stop Screws: M3 x 6mm Socket Head Cap (Qty 4)

• Hex Key: 5/32 (Qty 1)

• Hex Key: 2.5mm (Qty 1)

Weight: 2.5 oz
Dimensions (L x W x H): 3.9” x 1.5” x 0.4”
Materials: Anodized 6061 Aluminum, Stainless Steel

Wimberley, Inc. Phone: [phone]

1750 Broadway St Toll Free: 1-888-665-2746 (USA & Canada)
Charlottesville, VA
22902 USA www.tripodhead.com [e-mail]

5 Year Warranty – See www.tripodhead.com/warranty.cfm for complete details

P-20

Quick-release Lens Plate

Made in USA

The P-20 is a 3.86” long, double dovetail, Arca-Swiss style quick-

release plate. It is used to connect a camera lens, fitted with both a

rotation collar and tripod mounting foot, to a compatible quick-release

clamp. Wimberley plates are compatible with most Arca-Swiss style

quick-release clamps, such as those made by Wimberley, Really Right
Stuff, Kirk Enterprises, Markins, Arca-Swiss, Foba, Graf and others.

About the P-20

Figure 2

Figure 3

Raised Anti-Rotation
Nubs

Install Screw

Slide along Slot

Figure 1

1. Determine the number of screws you need. If your lens foot has
more than one mounting hole, it is recommended that more than

one hole be used to mount the plate to keep the plate from twisting on
the foot. For a lens foot with one mounting hole, see (Fig. 4) below.

2. Use the threaded end of the slot to remove or add screws

3. Install safety stop screws (Fig. 6 on p. 2). This is not required,

but it is highly recommended to insure the safety of your gear.

4. Determine the size of the mounting hole(s). If your lens foot
has one or more 3/8” mounting holes, install the reducer bushing
into the 3/8” mounting hole. Wimberley sells additional bushings.

5. Attach the lens plate to the foot of your lens. When removing
or installing the plate, loosen screws gradually while gently pulling the
plate flush against the screw caps to prevent binding of the screw

threads in the center slot of the plate.

6. Slide fore-aft to balance if needed

7. Tighten the screws firmly

If your lens has only one fastener, you can keep the plate from twisting on the lens foot by positioning the two raised nubs on the back of
the plate flush against the back of the lens foot (Fig. 2). If you prefer to have the plate extend behind the lens foot, you can seat the two

nubs against the front of the foot (Fig. 3).

Figure 4

Additional Anti-twist Feature:

If your lens foot has only one mounting hole, the two extra safety stop screws included with your plate can be used to
prevent the plate from twisting on the lens foot (fig 4). Thread the small screws into the two counter-bored holes in the
plate, so that the screw ends protrude from the top of the plate (the side you attach to your lens foot). When installed in
this fashion they provide a second set of anti-twist nubs that can be seated flush against the front or back of your lens
foot to prevent rotation.

Instructions continued on back >>

Installation Instructions

NOTE: When using older Kirk screw-mount

flash brackets, you must install the two extra
safety stop screws in the counter-bored holes in
order to keep the bracket from twisting on the plate.

Wimberley, Inc. ©2017, All Rights Reserved Rev. 170808

Using the Optional Safety-Stop Screws

Figure 6

Top Load

(Required with Safety Stop screws)

Safety Stop Channels We recommend using clamps with safety stop channels.

These channels allow a full range of forward and back motion but will not let the

plate slip out if the clamp is inadvertently loosened.

Wimberley lens plates have a double dovetail cross-section. The

upper dovetail allows you to attach Wimberley Flash Brackets as

well as other 3rd party quick-release style brackets.

Using Flash Brackets

Wimberley plates are also made to accommodate older Really

Right Stuff (RRS) and Kirk screw-mount flash brackets

Your Wimberley foot comes with four safety stop screws and a matching hex key. Two of these screws are intended
to be screwed into the small bottom threaded holes in the front and back of the plate (Fig. 6) to serve as stops that
prevent the plate from accidentally sliding out of the quick-release clamp. If you opt to use both stops, you must
open the jaws of the quick-release clamp wide enough to load your lens from the top (instead of sliding it in).

Top Loading is less convenient,

but you can be certain that your lens

will not slide out of the clamp.

Flash bracket
mounting groove

For RRS
Brackets

For Kirk
Brackets

Safety Stop

Channels

Your clamp must have
safety stop channels

3rd Party Clamp Warning: Our safety stop screws work with most 3rd party quick-release clamps, but clamps that do

not have channels and are too wide to be straddled by the safety stop screws will not work.

Arca-Swiss Z1

The safety-stop security
feature of this plate does not work
when used with an Arca-Swiss
“double-decker” quick-release clamp.

If this plate safety feature is important to you, we recommend

replacing the clamp with a Wimberley C-12 QR Clamp.

Thank you for your interest in Wimberley products. If you have any questions or comments please feel free to contact us.

OR

be short enough to allow the
plate to straddle the clamp

Clamps without safety stop
channels (or those without

adequate clearance) will
insecurely clamp the plate
at an angle

Figure 5