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5D & smoooth manual focus
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dCap View Drop Down
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Posts: 5303 		Post Options Post Options   Quote dCap Quote  Post ReplyReply Direct Link To This Post Topic: 5D & smoooth manual focus
    Posted: 01 October 2005 at 14:02
On the 7D we have the 'smooth manual' option. Youd hold the lens release button, then the AF centre point button, and then release them (AF button first, then the lens release button). This disengauges the AF motor pin and the manual focus on your lenses is silky smooth (instead of feeling a very slightly 'geared')

Is this the same on the 5D?
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Posts: 480 		Post Options Post Options   Quote Indigo Quote  Post ReplyReply Direct Link To This Post Posted: 02 October 2005 at 12:03
I tried this on my 7D, but I didn´t get it to work...could you explain more?
/Jonatan Tjäder
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dCap View Drop Down
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Posts: 5303 		Post Options Post Options   Quote dCap Quote  Post ReplyReply Direct Link To This Post Posted: 02 October 2005 at 12:15
Sure:
- mount a lens
- turn camera on
- switch to MF with the four-way switch near the lens mount (on 7D)
- now hold down the lens release button (keep holding)
- then press the AF button on the back of the camera (the one where you normally select the focus point)
- then release the lens release button
- then release the AF button
[edited, I had these last two steps the wrong way around, now correct]


.... this de-links the AF pin, so manual focus is now silky silky smooth.

The only lens of mine that this doesn't work with is the 50/2.8 macro! (version original)

Good luck.

Now .... does anyone know if this works on the 5D?

Edited by DcapVividOptic
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Posts: 1105 		Post Options Post Options   Quote H_K_F Quote  Post ReplyReply Direct Link To This Post Posted: 02 October 2005 at 17:31
I thought I read it in Popular Photography. I try it with a few lens on 5D.
There is an engaging sound and move focus to infinity automatically;
manual focus then seems slightly smoother... The effect is not that dramatic.

Don't know if there is a difference on a 7D & 5D...
Dynax 7 & 9. A2 & 5D. Sony A700 & A900
17-35/3.5G, 28-70/2.8G, 70-200/2.8G SSM, 35/1.4G, 50/2.8D Macro, 85/1.4GD, 300/2.8G HS, 600/4G HS, 18-70, 24-105.
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Posts: 31 		Post Options Post Options   Quote Miya Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 08:04
Dcap: the 5D can disengage the AF between the body and lens if DMF is selected by first pressing the Fn button, then scrolling down to AF mode. Gets a little tricky when handholding with a long macro at large magnifications ( 1:2 to 1:1), for me anyway.

Howard
Sony From The Mind of Minolta
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Posts: 234 		Post Options Post Options   Quote mikethelaserman Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 20:03
DMF is not the same as smooth focus - the AF drive pin is still engaged in the back of the lens.
On the Dynax 7 [film], during DMF the drive pin is connected via a set of gears to an encoder, so when you turn the focus ring the camera "knows" how much you moved it (this is an "extra" encoder and gear train, separate from [but connected to] the one which counts AF motor movement). I expect that the 7D is the same.
I suspect that the extra gear train and encoder is NOT present on the 5D (for cheapness), so during DMF only the disengaged AF clutch will be driven and not the "extra" gear train/encoder.

Sorry if this is hard to follow - there was a picture of the gear trains, clutch and encoders in the original D7 [film] brochure.
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Posts: 10859 		Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2006 at 01:11
Slightly confused by this, as there is no "geared" feel to manual focus on my 5D - it feels much like turning the focus rings of the lenses while they are off the camera - my film 5000 gives much the same feel, but that actually retracts the slot driver into the camera in manual focus.

Bob
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Posts: 288 		Post Options Post Options   Quote Troy Carter Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2006 at 06:31
Bob,

My Minolta 50 1.7 is very smooth with no gearing feel in MF but my Tamron 28-75 2.8 feels very "geared" in MF. The method described here did not reduce this feeling at all. The Sigma 15-30 does not change either. So, I'm thinking that it does not have this option.
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Posts: 47 		Post Options Post Options   Quote spaceweasel Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2006 at 08:00
Originally posted by DcapVividOptic

Sure:

Now .... does anyone know if this works on the 5D?


Yes, it works! Thanks for the hot tip!

There is an audible click when releasing the focus lock button...actually the shutter release (pressed down halfway).

Sort of like an Easter Egg :)
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dCap View Drop Down
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Posts: 5303 		Post Options Post Options   Quote dCap Quote  Post ReplyReply Direct Link To This Post Posted: 12 February 2006 at 12:37
Originally posted by spaceweasel

Originally posted by DcapVividOptic

Sure:

Now .... does anyone know if this works on the 5D?


Yes, it works! Thanks for the hot tip!

There is an audible click when releasing the focus lock button...actually the shutter release (pressed down halfway).

Sort of like an Easter Egg :)


Woah, I think this is the first confirmation that it DOES work on the 5D!
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Posts: 47 		Post Options Post Options   Quote spaceweasel Quote  Post ReplyReply Direct Link To This Post Posted: 13 February 2006 at 05:42
I did not follow your instructions, but my logic, instead :)

Try this with a Minolta D lens.

Turn the camera on.
Place the manual focus button in the manual position.
Push and hold the lens release button.
Hold the shutter button down half way to lock the focus.
Release the lens release button.
As you release the shutter button, you will hear a   distinct click.

Now manual focus...the ring is smooth and free!
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Posts: 288 		Post Options Post Options   Quote Troy Carter Quote  Post ReplyReply Direct Link To This Post Posted: 13 February 2006 at 06:44
Well, I tried it spaceweasel's way with a Tamron 28-75 2.8 and still couldn't get it to work. It won't focus once the lens release button is pressed. I tried several variations and still nothing.
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Posts: 349 		Post Options Post Options   Quote VainHedonism Quote  Post ReplyReply Direct Link To This Post Posted: 13 February 2006 at 08:39
Originally posted by spaceweasel

I did not follow your instructions, but my logic, instead :)

Try this with a Minolta D lens.

Turn the camera on.
Place the manual focus button in the manual position.
Push and hold the lens release button.
Hold the shutter button down half way to lock the focus.
Release the lens release button.
As you release the shutter button, you will hear a   distinct click.

Now manual focus...the ring is smooth and free!

how can you get focus lock if youre in MF mode?
there's nothing worse than a sharp picture of a fuzzy concept. -a. adams
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Posts: 7 		Post Options Post Options   Quote sunderlux Quote  Post ReplyReply Direct Link To This Post Posted: 13 February 2006 at 22:24
I dont feel anything different when I try it with the kit lens for 5D (18-70)
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