The RRS Lens Foot for Sony FE 400mm & 600mm GM OSS Lensesfrom RRS Lens Foot for Sony FE 400mm & 600mm GM OSS Lensesis 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. When assembled to a Sony 600 GM lens, does the lens still fit within the original Sony hard case?

A: Yes, the Really Right Stuff Lens foot will fit inside the Sony 600 f/4 GM lens case when assembled.

Q: 2. 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: 3. will this lens work using the 2x teleconverter?

A: They will mount , 2Xyou will lose 2 stops of light and it will become f11 , 1.4x you will lose a stop of light becomes f8 , you might loose autofocus

Q: 4. Is there a specific Arca-Swiss QR plate that is best for this lens?

A: This Wimberley P20 Quick Release Plate is a great arca type plate to use with the Sony FE 100-400mm f/4.5-5.6 GM OSS Lens. https://www.bhphotovideo.com/c/product/205334-REG/Wimberley_P_20_P20_Quick_Release_Plate.html

Q: 5. Does this lense need an adapter to be compatible with a A7rii?

A: No.

Q: 6. 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: 7. Does this come with a lens hood and lens cap?

A: Sony FE 100-400mm f/4.5-5.6 GM OSS Lens BH #SO100400GM comes with Sony ALC-F77S 77mm Front Lens Cap, Sony ALC-R1EM Rear Lens Cap, and Sony ALC-SH151 Lens Hood.

Q: 8. 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: 9. Is it compatible with the RRS quick lever release clamp?

A: Yes, it will work for the RRS clamp.

Q: 10. I shoot most images from a tripod, and very often images wherein I am angling the camera downward (including some straight down) - since the focal length cannot be locked, does the lens' Tight/Smooth feature work well enough to keep the lens from creeping while taking long shots?

A: The Sony FE 100-400mm f/4.5-5.6 GM OSS Lens has a zoom torque adjustment that allows you to tighten the zoom ring so that lens creep is not a problem.