Focus function for EOS M3 / M10 - page 7 - General Help and Assistance on using CHDK stable releases - CHDK Forum

# Focus function for EOS M3 / M10

• 68 Replies
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#### pigeonhill

• 488
##### Re: Focus function for EOS M3 / M10
« Reply #60 on: 15 / August / 2019, 12:48:19 »
@c_joerg

Radically different characteristics, ie 4000+ steps vs some 200.

Looks like different approaches are required.

#### pigeonhill

• 488
##### Re: Focus function for EOS M3 / M10
« Reply #61 on: 31 / December / 2019, 04:15:54 »
@c_joerg

Getting near the end of the year
Did you make any further progress in understanding and/or uncovering Lua based focus hooks/info on the M3?
Cheers and have a great New Year's Eve
Garry

#### c_joerg

• 901
##### Re: Focus function for EOS M3 / M10
« Reply #62 on: 31 / December / 2019, 06:19:12 »
Did you make any further progress in understanding and/or uncovering Lua based focus hooks/info on the M3?

No, unfortunately I had very little time this year ...
M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums

#### c_joerg

• 901
##### Re: Focus function for EOS M3 / M10
« Reply #63 on: 17 / February / 2020, 10:06:43 »
I have now played with my EF 100mm f / 2.8 macro usm on M3 again. Everything here is what I would expect. Whether I move the focus once by 200 steps or 200 times by one step, always results in the same distance of around 8.7mm (at the near focus limit of 310mm).

200 * 1   Step  = 8,7mm
100 * 2   Steps = 8,7mm
50  * 4   Steps = 8,7mm
40  * 5   Steps = 8,7mm
20  * 10  Steps = 8,7mm
10  * 20  Steps = 8,7mm
1   * 200 Steps = 8,7mm
M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums

#### pigeonhill

• 488
##### Re: Focus function for EOS M3 / M10
« Reply #64 on: 17 / February / 2020, 12:41:32 »
@c_joerg

Looks good. Haven’t had a lot of time to play around myself, as I gone over to the dark side and got myself a secondhand OM-D M5II to experiment with.

Cheers

Garry

#### c_joerg

• 901
##### Re: Focus function for EOS M3 / M10
« Reply #65 on: 18 / February / 2020, 08:23:13 »
Haven’t had a lot of time to play around myself, as I gone over to the dark side and got myself a secondhand OM-D M5II to experiment with.
You are not happy with your Canon anymore?
Here a picture with my Canon EF 100mm f / 2.8 macro usm.
EOS M3, f8, distance to the object 31cm. The ruler is inclined approximately 30 degrees.
According to the DoF calculator, this should actually result in a depth of field of 2mm.
When I look at that, it looks more like 1mm.
Yes I know, you cannot rely on the Dof calculator in the macro range.

M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums

#### pigeonhill

• 488
##### Re: Focus function for EOS M3 / M10
« Reply #66 on: 18 / February / 2020, 12:49:51 »
@c_joerg

Quote
You are not happy with your Canon anymore?

Absolutely not. I’m just a gear head and was attracted to the OMD M5 II because I can use my Canon lenses with an ND Throttle, I can use Live Time for long exposures, it’s got focus bracketing built in and it’s small and light for travel.

A bit of fun

#### c_joerg

• 901
##### Re: Focus function for EOS M3 / M10
« Reply #67 on: 22 / February / 2020, 11:57:41 »

My first Stack Result with ‘M3M10_Focus.lua’ on Canon EOS M3 (EF 100mm f/2.8 Macro USM).
f8.0, 1/4s, ISO100
Stack of 68 Images with Helicon Focus

Script Parameter:
shots=70
steps=10
speed=10
sleep=200
mode_t = StackF

The following video shows the making of the Image.

Attached a single image
M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums

#### c_joerg

• 901
##### Re: Focus function for EOS M3 / M10
« Reply #68 on: 03 / March / 2020, 09:31:54 »
Update of Script:
-- Update default Params
-- Add sleepv for Focus Braketing
-- Add log for Focus Braketing (Stack,Stackf)

One more Example

M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums