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Messages - garry23

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General Help Q&A / Re: Macro Focus Stacking
« on: August 18, 2021, 07:08:28 PM »

Forgot to say, ML flashes a message after each shot saying please put camera in LV.  As I say I wouldn’t expect this if camera is in LV, as required by focus stacking.

General Help Q&A / Re: Macro Focus Stacking
« on: August 18, 2021, 07:00:49 PM »


Shock, horror  ;)

If I use a script, I’m sure I can get it to stay in LV.

Oh well.

General Help Q&A / Macro Focus Stacking
« on: August 18, 2021, 06:28:15 PM »
I feel embarrassed to ask for help on this topic, but I simply can’t get ML menu driven focus stacking to work as I think it should.

I’m in LV on 5D3 with a 100mm Canon macro lens. Latest Lua fix version.

Stacking appears to work, but the camera goes out and back into LV after every shot. Which I don’t think it should.

I have no scripts running.

Can some kind person put me out of my misery.



As I mention ML and the M, I thought I would flag up my latest M3 post:

Not strictly ML, but related.

Here is the latest post on the CHDK version of my combined DOFIS+MUSIC script.

Thanks Walter, I couldn’t have said it better myself  ;) :) :D

Once again, a background link to my CHDK script that runs on the M3, because both the ML and CHDK deep focus bracketing scripts use the thick lens DOFIS model, which also accounts for pupil magnification:

I have tried to keep ML DOFIS and CHDK M3 Bracketing scripts aligned, at least functionally.

I thought some may be interested in my latest post on the Canon M3 deep focus bracketing Lua script.

As you will see, I’ve taken a UI steer from ML  ;)

BTW I really miss ML Lua, ie I have to muck about with 32bit integer math limitations over in CHDK land  >:(

How did u made it work?

EF-M lens vs EF lens with an adapter.

Maybe  ;)

Just added a useful addendum to the post, that allows you to estimate your over and under DoF, if you ignore the pupil mag.

A short post on DOFIS’s sister script that runs on the M3, albeit under a CHDK environment.

The post includes a video of the deep focus and infinity focus script running.

The CHDK environment drives the EF-M lenses rather well.

Academic Corner / Historic records
« on: April 03, 2021, 08:57:10 AM »
I thought some may be interested in this work:

General Help Q&A / Re: Point me please to low light shooting theme
« on: April 03, 2021, 08:27:22 AM »
As a simple photographer, ie not a videographer, all I would say is try and maximise your photon capture by not over using ISO.

High ISO shooting doesn’t increase noise like many think, it decreases the signal to noise of the image, especially in the shadow areas.

You need to look for capture strategies that capture the most photons and know when your sensor becomes ISO invariant. ETTR at the low ISOs, ie below the ISO invariance point, but not at high ISOs.

On my 5D3, I would not capture above ISO 1600-3200. On M I personally wouldn’t shoot above ISO 1600.

As I say, I’m not a video person, but I would expect the same principles to apply, assuming you are post processing each RAW video frame. That is RAW video is ‘just’ RAW photography done repetitively  :)


Yes, I’ve used it for internal shots and, as you say, ie looking out of a window. It looks as if it might be useful IF you also need to focus bracketing indoors. The sky bracket can be set between 2-6 Ev, ie relative to the rest of the scene.

An alternative approach, using DOFIS, is to use Dual-ISO when auto focus bracketing, ie without the sky bracket, but having ETTRed for the scene. But here you are limited to less than a 3Ev lift for the shadows.

Another approach is to use ML’s advance bracketing, together with DOFIS’s manual focus bracketing traffic light feature.

Bottom line: I have tried to craft DOFIS as a versatile focus tool for all photographers and videographers, ie who want to have more control and info on focus.

Scripting Corner / Sky Bracketing in DOFIS
« on: March 24, 2021, 02:40:56 PM »
I thought some may be interested in my new DOFIS Sky Bracketing feature, that works with auto focus bracketing.

Scripting Q&A / Re: Dual ISO and Lua
« on: March 23, 2021, 10:16:03 AM »

Many thanks for the hints. Now I know it’s not me, I’ll seek out a fix, if I can.



Scripting Q&A / Dual ISO and Lua
« on: March 23, 2021, 10:00:53 AM »

I’m not sure you are able to pick up on questions like this.

I’m playing with a script at the moment where I switch off Dual ISO between shots.

Using menu.set(“Expo”,”Dual ISO”,0) the dual ISO is switch off, ie when I exit I clearly see it’s off.

The problem is, when I call camera.shoot dual iso is still active.

Are you aware of any issues with dynamically switch dual on and off in scripts?



Not strictly an ML post, but it is related as this post is a demo of the DOFIS model running on a CHDK M3 and showing how I use Helicon Focus for landscape, deep focus bracketing.

General Chat / Re: Compressed RAWs?
« on: March 19, 2021, 07:27:07 PM »
It’s not BS until you get AI in the title of the product  :)

General Chat / Compressed RAWs?
« on: March 19, 2021, 06:53:35 PM »

General Chat / Re: Applying for fiscal hosting
« on: March 13, 2021, 10:19:14 AM »
Thanks for the reassurance and sharing your views.

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