Precision lens foot machined from 6061-T6 aluminum – tailor-made for the Sony FE 100-400mm F4.5 GM OSS. With Arca-Style dovetail, QD socket, and only 138g. Made in the USA.
Your Benefits with the Really Right Stuff LCF-105
- ✅ Tailor-made for Sony FE 100-400mm F4.5 GM OSS – specifically designed for model SEL100400MC
- ✅ Arca-Style compatible – integrated 38mm dovetail profile for all common quick-release clamps
- ✅ Integrated QD socket – Quick Disconnect for compatible carrying straps
- ✅ Two safety stop screws – prevent accidental sliding out of the clamp
- ✅ 1/4"-UNC and 3/8"-UNC threads – on the underside for additional mounting options
- ✅ Ultra-light at only 138g – ideal for wildlife and sports photography
- ✅ 6061-T6 aluminum, black anodized – robust and corrosion-resistant
- ✅ Made in the USA – highest manufacturing quality from Really Right Stuff
Product Description
The Really Right Stuff LCF-105 is a high-quality lens foot specifically designed as a replacement for the factory foot of the Sony FE 100-400mm F4.5 GM OSS (SEL100400MC). CNC machined from solid 6061-T6 aluminum and finished with a black Type II anodized coating, this lens foot offers unmatched stability and durability.
The integrated 38mm Arca-Style dovetail profile allows direct mounting of your camera-lens combination onto any Arca-Style quick-release clamp – no additional lens plate required. The continuous dovetail rail makes it easy to switch quickly between tripod head, gimbal, and other compatible mounts.
The LCF-105 features an integrated QD (Quick Disconnect) socket that allows attaching a compatible QD strap directly to the lens foot. This lets you transport your gear comfortably without removing the foot. Two safety stop screws reduce the risk of the lens foot sliding out sideways when the clamp is open.
On the underside, there are 1/4"-UNC and 3/8"-UNC photo threads, providing additional mounting options for tripod accessories or other equipment. Weighing only 138g, your setup remains pleasantly manageable – ideal for nature, wildlife, and sports photography.
The LCF-105 fits clamps from Really Right Stuff, ProMediaGear, Wimberley, Jobu Design, and Kirk. Arca-Style compatible 38mm quick-release clamps as well as the FlexShooter screw cross clamp can also be used.
Technical Specifications
- Brand: Really Right Stuff
- Model: LCF-105
- Compatibility: Sony FE 100-400mm F4.5 GM OSS (SEL100400MC)
- Material: 6061-T6 aluminum
- Finish: Black anodized (Type II)
- Weight: 138 g
- Length: 12.04 cm
- Width: 3.81 cm
- Height: 3.81 cm
- Mount: 1.5" Arca-Style dovetail
- Features: QD socket, two safety stop screws, 1/4"-UNC and 3/8"-UNC threads
- Country of Origin: USA
- In the Box: 1x RRS LCF-105 lens foot, 1x M2.5 hex key, 1x user guide
Frequently Asked Questions (FAQ)
Is the Really Right Stuff LCF-105 compatible with the Sony FE 100-400mm F4.5 GM OSS?
Yes, the LCF-105 is specifically designed for the Sony FE 100-400mm F4.5 GM OSS (SEL100400MC). It replaces the factory lens foot and provides a precise fit with Arca-Style dovetail.
What material is the RRS LCF-105 made of?
The lens foot is CNC machined from high-quality 6061-T6 aluminum and finished with a black Type II anodized coating. This ensures durability and corrosion resistance.
Does the LCF-105 have a QD socket?
Yes, the LCF-105 features an integrated QD (Quick Disconnect) socket for compatible QD straps. This allows you to carry your camera-lens combination comfortably without removing the lens foot.
Is the RRS LCF-105 Arca-Style compatible?
Absolutely. The LCF-105 features an integrated 38mm Arca-Style dovetail profile and fits all common Arca-Style quick-release clamps, including RRS, ProMediaGear, Wimberley, Jobu Design, Kirk, and FlexShooter.
Where is the Really Right Stuff LCF-105 made?
Like all Really Right Stuff products, the LCF-105 is 100% made in the USA from American 6061-T6 aluminum.
What Other Photographers Are Asking in Forums
Question from DPReview Forum: "Does the LCF-105 also fit the Sony 200-600mm?"
Answer: No, the LCF-105 is specifically contoured for the Sony FE 100-400mm F4.5 GM OSS (SEL100400MC). For the Sony 200-600mm, you need a different lens foot. Always check the exact model designation of your lens before purchasing.
Question from Reddit r/SonyAlpha: "Do I need to remove the original lens foot to install the LCF-105?"
Answer: Yes, the LCF-105 completely replaces the factory lens foot. Installation uses the original screws of your Sony lens – an M2.5 hex key is included.
Question from FM Forums: "Can I use the LCF-105 with a gimbal?"
Answer: Yes, the continuous 38mm Arca-Style dovetail profile is ideal for gimbals. The sculpted geometry of the foot improves balance and handling on gimbals, tripods, and monopods.
Order the Really Right Stuff LCF-105 Lens Foot for Your Sony FE 100-400mm GM Today!
✓ Made in USA ✓ 14-Day Right of Withdrawal (EU) ✓ Expert Advice ✓ Free Shipping
Customer Reviews
⭐⭐⭐⭐⭐ Thomas K. (September 1, 2026)
"Perfect craftsmanship. The LCF-105 fits my Sony 100-400 GM like a glove and the QD socket is super practical. Highly recommended!"
⭐⭐⭐⭐⭐ Sabine R. (August 20, 2026)
"Finally a lens foot that fits the Sony 100-400. Arca-Style works flawlessly with my RRS BH-55 ball head."
