EOS R10 Electronic full time mf vs lens electronic mf

[thetoxicmud]

Electronic full time MF

I’m reading r10 manual ,can someone tell me the difference between electronic full time mf when it’s enable and lens electronic mf as they appear to be doing same thing.

Also settings “ disable after one shot “ and “ one shot enable “ in lens electronic mf seems to be doing the same, nothing gets disabled after af.

Disable in Af mode doesn’t disable either if electronic full time mf is set to on , what am I missing these settings seems to be doing the same?

 

  

[FloridaDrafter]

Hello!

Here is the way I see it, granted I set it up a long time ago, but I grabbed my wife's R6 II and fooled with it a bit this evening.

When enabled, "Electronic Full-time MF" enables any Compatible Lenses (and cameras) to manually focus at any time, regardless of whether you have the shutter button half depressed to acquire focus or not. This also works with BBF, but I can't confirm that. In essence, when enabled, you have manual and autofocus capabilities at all times.

Now "Lens electronic MF", in contrast, will work when you have "Electronic Full-time MF" disabled, but only when you either half depress the shutter button to acquire focus or hold whatever button you have BBF assigned to. I don't know what's going on with "Disable after One-Shot". I just couldn't see anything it does except remind you that you have manual focus totally disabled.

Newton

[gregory109]

---

@thetoxicmudfloridablue wrote:

Electronic full time MF

I’m reading r10 manual ,can someone tell me the difference between electronic full time mf when it’s enable and lens electronic mf as they appear to be doing same thing.

Also settings “ disable after one shot “ and “ one shot enable “ in lens electronic mf seems to be doing the same, nothing gets disabled after af.

Disable in Af mode doesn’t disable either if electronic full time mf is set to on , what am I missing these settings seems to be doing the same?

 

  

---

Hello, @thetoxicmud

Your post is beneficial to me, it's solves my query.

Best Regard,
Gregory Chavez

[p4pictures]

The two settings are linked but different.

Lens electronic MF

This is a setting that is also on DSLR cameras. It is used when the lens has an electronic focus ring. Some examples from DSLR days are EF 85mm f/1.2L and EF 40mm f/2.8 STM. Additionally all RF lenses have electronic focus rings. This function works when ONE SHOT focus is used. Half press the shutter or press the back button to start focus, once focus completes and the AF point is green then you can rotate the lens ring to adjust focus. Macro photographers might appreciate the option to magnify.  

I have just confirmed this with both EF 40mm f/2.8 STM and RF 28-70mm F2L USM. 

Electronic full-time MF

This is similar, but a new mirrorless feature to respond to photographers who used the EF lenses. Most EF lenses with USM focus motors have a feature called full-time manual focus. With this you can manually adjust focus just by turning the focus ring without switching to MF on the lens. I find this useful on DSLR when shooting macro as an example. I will manually focus the lens close to where I want so that if I then use AF the lens is not hunting to find the subject. It's kind of a pre-focus trick. Some photographers with longer lenses use this to pre-focus the lens at the approximate subject distance. This speeds up the AF acquisition.

Since the RF lenses all have electronic focus rings, there was a request to have the old function added. It was not in the early versions of the EOS R5/R6 and was added to those cameras with firmware updates. It is designed to allow manual focus at any time, but there is some limits to the lenses it works with. Please check the supplemental info for lenses compatible with the electronic full-time MF feature

https://cam.start.canon/en/H001/supplement_0060.html 

The important thing to note is that setting Electronic full-time MF to enable means that the Lens electronic MF setting is no longer applicable. 

I hope that this brings some clarity.

[thetoxicmud]

Thank you very much for deep explaining , it makes much sense now. 

only the function “disable after one shot” makes no sense, I can’t MF and as the description says “ disable mf after autofocusing “  so basically mf is not possible, how is it function different from completely turning OFF?

Electronic full time mf seems useful but I wish some guidance was appearing in full time for mf just like when you switch to mf, distance line etc . Too bad rf 100mm macro is not compatible that would be useful.

[p4pictures · Accepted solution]

Always good to ask questions, and encourage more in-depth investigation. Here's my results for the different settings for Lens electronic MF. 

I had Electronic full-time MF deactivated as it takes priority over this function if the lens is compatible with electronic full-time MF.

Default setting is Disable after One-Shot

If you set the camera to one shot AF, servo AF or AI focus* and your shutter button half-press is set for AF + metering start (the default), then no way to do manual focus override.

If your shutter button is set for metering start, or AE lock (while button is pressed) as would be the case for back button configuration then something different happens. You can simply turn the focus ring and the lens manually focuses in servo AF, one shot AF or AI focus AF. Turning the lens focus ring has no effect while the AF-ON (or whatever back button you use) is pressed. 

* EOS R6 Mk II and EOS R8 have one-shot, servo and AI focus modes. Also note that AI focus results are unpredictable since you do not know if it will decide to use servo or one-shot AF.

One-Shot -> enabled

For both shutter button AF and back button AF, with one-shot focus. Then after the focus is achieved and you get the green AF points plus beep, you can turn the focus ring to adjust the focus.

One-Shot -> enabled (magnify)

This is the same as One-Shot -> enabled, but with the added benefit that the image is magnified at the AF point location. 

Disable in AF mode

This is as expected, if the lens is set to AF then no manual focus override is possible regardless of one-shot or servo AF, shutter or back button AF.

I think that's all the bases covered. 

This info was based on my tests with an EF 40mm f/2.8 STM pancake lens - one in the electronic focus ring category fitted to both EOS R6 and EOS R6 Mark II, and also EOS R10 with RF-S 18-150mm which has electronic focus ring like all RF lenses.

[thetoxicmud]

thank you I understand that now.