Improving CHDK ND filter support - page 12 - General Discussion and Assistance - CHDK Forum

Improving CHDK ND filter support

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Re: Improving CHDK ND filter support
« Reply #110 on: 04 / February / 2019, 11:37:00 »
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I'd appreciate test results from any cameras with an ND filter that aren't listed below.

G1x and S110 with 3 Warnings...
M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), 2*S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
YouTube https://www.youtube.com/channel/UCrTH0tHy9OYTVDzWIvXEMlw/videos?shelf_id=0&view=0&sort=dd

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Offline reyalp

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Re: Improving CHDK ND filter support
« Reply #111 on: 04 / February / 2019, 12:30:36 »
G1x and S110 with 3 Warnings...
Thanks. 

These are both like G7X, where ND control has to be done in the shoot hook for "quick" mode. This may be normal for ND+Iris cams, but I decided to make it a warning until I have a bigger sample.
Don't forget what the H stands for.

Re: Improving CHDK ND filter support
« Reply #112 on: 04 / February / 2019, 13:20:48 »
I'd appreciate test results from any cameras with an ND filter that aren't listed below.
S100 log attached.  There was an error message but the script continued.

Let me know if I need to do something different to run it?

I can probably find one of my SX50's but my other cameras are packed away until some time in mid-March.

Edit :  SX50 shows ND not enabled in port
« Last Edit: 04 / February / 2019, 14:06:29 by waterwingz »
Ported :   A1200    SD940   G10    Powershot N    G16

Re: Improving CHDK ND filter support
« Reply #113 on: 04 / February / 2019, 13:42:32 »
SX230:

Quote
ND not enabled in port
M100 100a, M3 101a, 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), 2*S45,
Flickr https://www.flickr.com/photos/136329431@N06/albums
YouTube https://www.youtube.com/channel/UCrTH0tHy9OYTVDzWIvXEMlw/videos?shelf_id=0&view=0&sort=dd


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Offline reyalp

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Re: Improving CHDK ND filter support
« Reply #114 on: 04 / February / 2019, 16:41:13 »
Thanks.

Regarding sx50 and sx230, I think we've conclusively shown already that these cameras have no ND.

On S100, there was big variation between first shot later shots with ND out in quick and cont mode. I'm not sure what to make of this. The sv values are a bit odd. If it was in auto ISO, maybe try re-running with manual ISO. I think the script *should* work with auto, but maybe there's a bug or something weird with the port.
Don't forget what the H stands for.

Re: Improving CHDK ND filter support
« Reply #115 on: 04 / February / 2019, 16:53:25 »
On S100, there was big variation between first shot later shots with ND out in quick and cont mode. I'm not sure what to make of this. The sv values are a bit odd. If it was in auto ISO, maybe try re-running with manual ISO. I think the script *should* work with auto, but maybe there's a bug or something weird with the port.
I ran the test with the camera pointed at a concrete block wall with just a 100 watt bulb overhead.  Maybe I should try to find a better lit low contrast scene?
Ported :   A1200    SD940   G10    Powershot N    G16

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Offline reyalp

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Re: Improving CHDK ND filter support
« Reply #116 on: 04 / February / 2019, 17:07:34 »
I ran the test with the camera pointed at a concrete block wall with just a 100 watt bulb overhead.  Maybe I should try to find a better lit low contrast scene?
I think that should be fine. As long as the lighting isn't changing, the script should be pretty reproducible, and it will warn if there is a lot of over or under exposure. The fact that it's the first shot of the quick and cont sequences while everything is very consistent makes me suspect it's not scene related.

One other thing is odd:
The "single" shots and first quick/cont shots are ~2ev underexposed (meter96 = -180-ish), while the later shots are much closer to neutral. Yet the set tv and av are identical, and the sv only varies by a few units.
Don't forget what the H stands for.

Re: Improving CHDK ND filter support
« Reply #117 on: 04 / February / 2019, 17:32:28 »
On S100, there was big variation between first shot later shots with ND out in quick and cont mode. I'm not sure what to make of this. The sv values are a bit odd. If it was in auto ISO, maybe try re-running with manual ISO. I think the script *should* work with auto, but maybe there's a bug or something weird with the port.
Ran the script again - slight better illuminated neutral scene and ISO locked at 400.  Log file attached.
Ported :   A1200    SD940   G10    Powershot N    G16


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Offline reyalp

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Re: Improving CHDK ND filter support
« Reply #118 on: 04 / February / 2019, 22:30:30 »
Ran the script again - slight better illuminated neutral scene and ISO locked at 400.  Log file attached.
Thanks. That looks normal, the only warnings are the "quick" mode issue which applies to all ND+iris cams so far. Not sure what was happening in the previous run.
Don't forget what the H stands for.

Re: Improving CHDK ND filter support
« Reply #119 on: 04 / February / 2019, 22:54:12 »
Not sure what was happening in the previous run.
Low light - especially once the ND filter inserted?
Ported :   A1200    SD940   G10    Powershot N    G16

 

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