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Shimoda Core Unit - Mirrorless - L25 RST Modular Camera Insert With Rear, Side and Top Access for Action X25 Backpack, Supports Telephoto Lenses up to 16.9 in. (180-600mm/200-600mm).

Based on 2 reviews
Condition: New
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$119.95

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Availability: In Stock.
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Arrives Saturday, Oct 31
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At a glance

Condition
New
Size
L25 RST
Color
Mirrorless
Model
520-452
Dimensions
10.2"L x 9.4"W x 16.9"H
Weight
1.2 lb
Material
Polyester
In the box
Core Unit

Features 5

  • SPECIFICATIONS: Outer Dimensions: 10.2W x 17.7H x 5.1D in, Inner Dimensions: 9.4W x 16.9H x 4.7D in Engineered specifically for the Shimoda Action X25 backpack, the Mirrorless L25 RST Core Unit fills the entire main compartment to maximize storage capacity while maintaining balance and comfort. Supports mounted mirrorless or DSLR cameras up to 4.7 inches (12cm) tall and accommodates super-telephoto lenses up to 16.9 inches long (180-600mm/200-600mm), even when attached to the camera body, making it ideal for wildlife and expedition photography.
  • RST ACCESS SYSTEM: Rear, Side, and Top access points allow photographers to adapt gear retrieval to terrain and conditions. Full rear access enables complete system organization, side access aligns with the Action X25 quick-draw zipper for fast shooting without removing the pack, and top access allows direct reach to long mounted lenses through the roll-top opening.
  • PROTECTIVE EVA CONSTRUCTION: High-density EVA foam walls and dividers provide superior impact protection compared to standard foam inserts while using less internal volume. This construction keeps gear secure during aggressive movement, rough travel, and harsh outdoor conditions while maximizing usable space inside the backpack.
  • MODULAR ADVENTURE DESIGN: Optimized for demanding field use, the L25 RST allows photographers to configure their Action X25 for maximum gear carry on technical shoots, while still retaining the ability to swap to smaller Core Units for lighter missions, ensuring one backpack adapts to multiple adventure profiles.

Description

Designed for demanding photographers operating in rugged terrain, the Shimoda Core Unit Mirrorless L25 RST is the most capacity-focused insert available for the Action X25 backpack, engineered to safely carry large mirrorless or DSLR systems while maintaining fast access and balanced carry. RST stands for Rear, Side, and Top access, allowing photographers to adapt how they reach their gear based on terrain, weather, and shooting conditions without compromising stability or safety. The L25 RST fills the entire main compartment of the Action X25, maximizing vertical storage and enabling support for mounted super-telephoto lenses up to 16.9 inches long, including popular options like 200-600mm, 180-600mm, and 200-800mm class lenses from major brands. This makes it an ideal solution for wildlife, sports, and expedition photographers who rely on long glass in unpredictable environments. The rear panel opens fully for complete system organization at camp or in controlled settings, while the side access aligns perfectly with the Action X25 side zipper for quick camera retrieval without setting the pack down. A dedicated top access zipper allows direct reach to tall mounted lenses through the roll-top opening, a critical advantage when rapid response is required. Internally, high-density EVA walls and dividers provide exceptional impact protection while minimizing wasted space, allowing more gear in a compact footprint that meets strict carry-on depth requirements. The mirrorless-depth design supports non-gripped mirrorless and DSLR bodies up to 4.7 inches (12cm) tall, keeping the backpack profile low and stable during movement. Included with the Core Unit is a lightweight, water-resistant Skin that doubles as both a dust-free storage cover and a versatile packing cube when the insert is not in use. Built for photographers who push into harsh conditions, the L25 RST delivers maximum capacity, modular flexibility, and uncompromising protection while remaining fully integrated with Shimoda’s adventure-ready carrying system.

Specs 20

Closure Type Zipper
Strap Type Shoulder
Handle Type shoulder strap
Number of Compartments 3
Color Mirrorless
Style Name Pro
Pattern Solid
Item Dimensions L x W x H 10.2"L x 9.4"W x 16.9"H

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Oct 31

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


Perfect for my telephoto and fits the Explore 25!!
Size: L25 RST Color: Mirrorless
This is my 4th Shimoda purchase. This fits the Sony 200-600mm with the A1 II perfectly, even with a 1.4x TC attached. It is compatible with the Shimoda Explore v2 25 though you sacrifice the upper compartment, which is fine by me. Also accessible from the top but with a little bit of work to open the cover. Anyway, the photos speak for themselves. No regrets!! ... show more
Reviewed in the United States on August 22, 2026 by Jen P

Poor design choices
Size: L25 RST Color: Mirrorless
The stated design goal of this ICU is to accommodate mirrorless cameras with long telephotos attached. The videos show effortless removal of the camera via the top opening. The real life behavior is NOTHING like this. The mirrorless body and lens attached will fit only if you remove the collar and the hood, and the body is a smallest possible mirrorless. The attached pictures show a Z8 with a 180-600 with all the trimmings. As you can see thjngs "fit" but the top access for which you paid extra money is completely blocked and not usable. I love the Shimoda ICUs but they dropped the ball big time on the XL20 and XL30 RST. If you want to do what the videos show you need the X40 or Xl50 RST. ... show more
Reviewed in the United States on November 13, 2025 by GroovyGeek
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