ISO strangeness

[garry23]

I've convinced myself that setting ISO values via Lua 'may' be broken.

I can use camera.iso.apex or camera.iso.value etc to read, eg x = camera.iso.apex; but if I use something like camera.iso.apex = 10 I get 'failed stack traceback' error.

Has anyone else come across this?

[a1ex]

Last time I've checked, it used to work:

https://foss.heptapod.net/magic-lantern/magic-lantern/-/blob/branch/lua_fix/scripts/api_test.lua#L785

Code: [Select]

            local apex = math.random(5*100,10*100)/100
            camera.iso.apex = apex

https://codingkilledthecat.wordpress.com/2012/06/26/how-to-ask-for-programming-help/
https://en.wikipedia.org/wiki/Minimal_working_example
http://sscce.org/

[garry23]

@a1ex

Using latest Lua fix on 5D3 123.

Shutter and aperture all OK.

Reading ISO is OK.

Just tried running the API test script and got error "Not enough memory" ?

[garry23]

Looks like one of my scripts is creating the problem :-(

If I only run API test all looks OK :-(

But which script I wonder?

Time to test!!!!

[garry23]

@a1ex

API test fails here:

Testing picture taking functions...
Snap simulation test...
Single picture...
A:/DCIM/103EOS5D/2P6A0508.CR2 not found.
A:/DCIM/103EOS5D/2P6A0508.JPG not found.

ML/SCRIPTS/API_TEST.LUA:1062: assertion failed!
stack traceback:
   [C]: in function 'assert'
   ML/SCRIPTS/API_TEST.LUA:1062: in function 'test_camera_take_pics'
   ML/SCRIPTS/API_TEST.LUA:1574: in function <ML/SCRIPTS/API_TEST.LUA:1564>
   [C]: in function 'xpcall'
   ML/SCRIPTS/API_TEST.LUA:1564: in function 'api_tests'
   ML/SCRIPTS/API_TEST.LUA:1603: in main chunk

[garry23]

Well I'm mystified, but that's easy :-)

Here is the point of failure, that generates the traceback error:

Code: [Select]

local iso_b = camera.iso.apex
local temp = camera.shutter.ms
local stop = MUSIC_menu.submenu["Number of images?"].value
if MUSIC_menu.submenu["Bookends?"].value == "yes" then stop = stop + 2 end
for i = 1,stop do
if (i == 1 or i == stop) and MUSIC_menu.submenu["Bookends?"].value == "yes" then -- tweak shutter and ISO for first and last images in bracket set
camera.shutter.ms = 1
camera.iso.apex = 10 --FAILS HERE!!!!!!!!
else
camera.iso.apex = iso_b
camera.shutter.ms = temp
end
my_shoot()
msleep(MUSIC_menu.submenu["I2I Delay"].value * 1000)
if MUSIC_menu.submenu["Focus shift mode"].value ~= "None"  then
check_lens_ready() -- just in case
lens.focus(dir,step,true) -- move lens
check_lens_ready() -- just in case
lens.focus(-dir,step,true) -- move back
end
end
camera.shutter.ms = temp
camera.iso.apex = iso_b
display.notify_box("Script Finished Running", 3000)
else -- something is wrong
display.notify_box("Switch on LV", 3000)
end

[garry23]

In the end I 'just' did a complete reinstall of the latest Lua_fix and all now seems OK.

As I say, strange.

[garry23]

@a1ex

I'm still nowhere with this ISO strangeness.

I have the latest Lua running on my 5D3 in M mode.

I have deleted all scripts bar this test script:

Code: [Select]

--ISO Test
t = camera.iso.value
menu.close()
sleep(1)
camera.iso.value = 800
display.notify_box("iso="..t, 3000)
sleep(3)
camera.iso.value = t
The script fails with this message:



Can you see the error of my ways?

Cheers

Garry

[garry23]

Bugger: why doesn't the image show!!!!!!

Here is the link: https://ibb.co/G7FXWbF

Fixed 

[garry23]

@a1ex

I had a thought and just tested it out and now can trigger the error.

If only ExpSim is enabled all is OK.

If I also enable Expo Override, then the error occurs, ie I can't control ISO via Lua.

I don't under why this is occurring, but at least I can circumvent it by not playing around with ISO if I also need Expo Override!

[a1ex]

Confirmed - that's a valid bug report.

[garry23]

@a1ex

Thanks for confirming. For a while I thought I was going mad, then, last night, as I was in bed thinking about it, I wondered if the exposim or expo override was the issue.

May I assume the bug is registered now?

Cheers

Garry