The Lens Foot for Sony FE 400mm f/2.8 GM OSS and FE 600mm f/4 GM OSS Lenses from Really Right Stuff is a CNC-machined 6061-T6 aluminum plate with an Arca-type compatible dovetail mount. The low profile of this replacement foot provides a lower center of gravity for better balance when compared to the original foot of the telephoto lens. The plate has 1/4"-20 and 3/8"-16 mounting sockets in case there is no mounting clamp present, and an integrated QD socket is compatible with QD adapters, straps, and slings. Optional safety stop screws are available with the foot to prevent the foot from sliding out if a quick release clamp is accidentally opened.

Low-Profile Replacement Lens Foot    Arca-Type-Compatible Dovetail    Type II Black Anodized 6061-T6 Aluminum    1/4"-20 and 3/8"-16 Mounting Sockets    Integrated QD Socket for Shoulder Strap    Optional Safety Stop Screws

Arca-type-compatible dovetail mount.

Low-profile replacement lens foot with a low center of gravity.

Type II black anodized 6061-T6 aluminum with 1/4"-20 and 3/8"-16 mounting sockets.

Integrated QD socket is compatible with QD adapters, straps, and slings.

Optional safety stop screws prevent the lens from sliding out if a quick release clamp is accidentally opened.

Related Questions and Answers

Q: 1. Will this also work of the f/4 version of the Sony 70-200 or just the G master 2.8?

A: No, just the 2.8.

Q: 2. Hi does this replacement foot includes the 4 lens foot mounting screws like the wimberly one?

A: The Kirk Lens Foot for Sony FE 400mm f/2.8 GM OSS and FE 600mm f/4 GM OSS Lenses includes four mounting screws in the box.

Q: 3. will this fit the Sony 400mm F2.8 GM?

A: Unfortunately, Really Right Stuff LCF-101 is not compatible with Sony 400mm 2.8 GM. For that lens you can use this one: Really Right Stuff Lens Foot for Sony FE 400mm f/2.8 GM OSS & FE 600mm f/4 GM OSS Lenses BH #RELCF103 • MFR #LCF-103 https://www.bhphotovideo.com/c/product/1556949-REG

Q: 4. What is the QD socket made of?

A: The QD socket of the Leofoto SF-03 Replacement Lens Foot for Sony FE 400mm f/2.8 GM OSS & FE 600mm f/4 GM OSS Lenses is made of aluminum.

Q: 5. Does this come with the screws which act as a safety for the lens to slide out of the dove tail receiver?

A: Yes, the Really Right Stuff LCF-101 Replacement Foot for Sony FE 100-400mm f/4.5-5.6 GM OSS and FE 70-200mm f/2.8 GM OSS Lenses comes with two screws which act as a safety for the lens to slide out of the dovetail receiver.

Q: 6. Will this fit the Sony FE 70-200mm F4 Macro G OSS II Lens?

A: The lens foot is not compatible with the Sony FE 70-200mm f/4 Macro G OSS II Lens (Sony E), B&H # SO702004G2.

Q: 7. Is it compatible with lens support kit, Kirk LS-1? Does it interfere with the lens hood of new Sony 70-200 f2.8 GM II 2nd generation when we reversed and attached lens hood on lens

A: Yes.

Q: 8. How does it feel in your hand? Does it provide grip support for hand holding?

A: Based on the feedback we received on this product, it is comfortable to hold while adding grip support to these Sony lenses.

Q: 9. I own the FE 100-400mm and the original foot now shows a looseness even when screwed in to the max. The Looseness is from front to back. Unless I am mistaken, orginally there was no looseness. I am wondering if the design of this replacement will address this issue and offer a perfect thightness? Thanks!

A: I can answer my own question... The problem was not with the removable foot as I thought, but with the fixed portion on the lens where the removable foot attaches. That silver metal piece is screwed in the body of the lens. The screws unscrewed themselves due to vibrations in the Jeep on an African safari. I have now used removable Blue Loctite to insure that it does not happen again. I wanted to share it so that others can do prevention in making sure it does not happen to them and inflict bigger damage.

Q: 10. Does the RRS foot get the same height as the original foot from Sony? Will it fit into the Sony lens case if the RRS foot is mounted?

A: Yes. The RRS foot is almost exactly the same height as the original Sony foot. A very tiny bit taller. It's definitely longer. It still fits fine in the Sony lens case.