I would like to use my A6100 with a Samyang 24mm F2.8 for street photography. I would like to use hyperfocal focusing for speed. But the lens uses focus by wire and even if I set the correct distance (approx 2.6m for F11) using manual focus, the slightest knock will refocus and I may not notice until too late.

I have some questions:

1. If I manually focus, the inbuilt focus distance scale resolution jumps from 2m to 3m.

   1. Is there any way to get better resolution like 2.1, 2.2 etc?

   2. How accurate are these distances?

2. Once I have focused on the required distance. I plan to switch from MF to AF-C, so lens focus ring changes wont change the focus. My camera is set to back button focusing. I i do not touch the back button, will it retain the focus distance set manually?

Are there any other/better ways to focus to a hyperfocal distance?

Hi Zedster,

At the cost of stating the obvious, you may be able to work around the distance scale resolution issue like this:
1/ manually focus to a distance closer than 2m
2/ slowly turn the ring until the meter shows 2m
3/ slowly turn the ring until the meter shows 3m, paying attention to how much you had to turn it from the previous position
4/ turn back the ring by about half that amount

This should focus your lens at approximately 2.5m.

Alternatively, you could of course place a subject at exactly 2.5m from the front of the lens and manually focus until it looks sharpest in the viewfinder, and there you go.

Please note that hyperfocal focussing does not usually require absolute perfection, since it relies on having a large depth of field anyway.

Hope this helps somehow!
Paolo

Edited Friday at 02:24 PM3 days by Paolo70

Hi Paolo, thanks for that I had already experimented with your second option. I focused on an object 2.8m away in manual mode using focus magnification. Then switched to AF mode and wandered around for a couple of hours taking photographs without touching my back button focus button. All worked fine. For good measure I switched the camera off to see if it remembered the manually set focus distance, then switched it on an hour later and it did. So all seams fine.

On 1/9/2026 at 6:17 PM, Zedster said:

Once I have focused on the required distance. I plan to switch from MF to AF-C, so lens focus ring changes wont change the focus. My camera is set to back button focusing. I i do not touch the back button, will it retain the focus distance set manually?

This is what I probably would do in your situation. However, rather than focusing manually, I would just find something approx. 2.6m away, if using f11, and just autofocus on it.