Use this Sea & Sea Focus Gear to control manual focusing with your Sony FE 90mm f/2.8 Macro G OSS lens in a compatible port, which mounts onto the MDX underwater housing for the a7 III mirrorless camera.

Mounts onto Focus Ring of Lens

Related Questions and Answers

Q: 1. How durable is this lense in weather like rain or dust?

A: I've had it out for Friday Night Lights through many light mist to pouring rain circumstances. I do use a Rain Sleeve & I've not had a problem. When It's been a great lens that pairs wonderfully with my Sony a9. When I get home, I do undo everything & let everything dry overnight. I do not keep it in my bag. When you're investing that much money, I tend to do a bit more to ensure it's worth

Q: 2. What is the best Sony or Sony Mount Lens to use on Sony A7iii cameras to copy 35mm and 120 negatives?

A: Optically the best one is the Sony 90mm macro. Sony FE 90mm f/2.8 Macro G OSS Lens with UV Filter Kit BH #SO9028F (B&H Kit) https://bhpho.to/35hOkAe

Q: 3. Is this lens compatible with the Sony A 6000

A: Yes. This lens is fully compatible with the Sony Alpha a6000.

Q: 4. Could you theoretically attach treads and a Tilta Nucleus-M to this to manually control zoom and focus for video?

A: Yes, this is possible. Gearing can be attached to the Zoom and Focus Rings to enable control via a Follow Focus system.

Q: 5. Got this and the macro is fine but it takes 4 - 6 SECONDS TO FOCUS on regular stills mode!!! This is even without altering the composition from one shot to the next, center focus, tripod. On video it takes 2 seconds for focus and the thing is noisy as a garbage truck. Anyone else have this problem or do I need to return this dog back to the pound?

A: Yes. Same problem. The lens hunts for focus even when i'm not shooting. Super slow to obtain focus. I bought it for the macro, but there is terrible pin cushioning there too. Send it back.

Q: 6. Zoom ring looser as it gets closer to 200mm ??

A: I have both the Canon and Sony 70-200 mm and they are about the same.It seems right to me.

Q: 7. Hello, With the correct set up ring, will this lens and an ES-1 Copy adapter allow me to digitize slides on my a7iii?

A: While this FE 50mm f/2.8 Macro Lens along with a step up ring and the Nikon ES-1 could work, it has been tested to confirm to our knowledge. The results may vary.

Q: 8. Is there a lens hood that can be used with this lens? I notice there is a inner and outer set of threads on the front of the lens. What is the diameter of the outer threads?

A: The filter thread size for this lens is 55mm. The recommended lens hood can be found here https://bhpho.to/2lZBpvf

Q: 9. Has the focus speed improved at all with firmware updates?

A: On the a7r I found it was quite slow to af compared to most modern lenses, and in low light at macro range lots of af hunting

Q: 10. how do I adjust the settings to increase the depth of focus?

A: I usually use this lens as a macro lens attached to two macro extensions. Shooting in manual mode I adjust the f stop - the higher the number the more field of depth becomes. Be careful of your shutter speed and the amount of light you have.