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polarizer effectiveness with SX100

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Offline shinnen

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polarizer effectiveness with SX100
« on: 19 / July / 2019, 09:37:40 »
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Hi,
       I have fitted my SX100 with a (clip on) polarizing filter; but since it does not have a viewfinder, it is rather difficult to see the subtle  effect of the filter on the screen, especially in bright sunlight.
       I'm thinking that either the histogram or zebra applicatins may be able to help me to determine when the polarizer is at it's optimal rotation, but am not really sure which application (if either) will help, what settings to use, and what to look for.
       Any suggestions are appreciated.
Thanks,
..... john
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Offline c_joerg

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Re: polarizer effectiveness with SX100
« Reply #1 on: 19 / July / 2019, 10:24:06 »
Use the Camera in M Mode (with fixed ISO) and watch the exposure step bar. The bar should go to minimum.
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M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
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Offline shinnen

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Re: polarizer effectiveness with SX100
« Reply #2 on: 19 / July / 2019, 13:11:17 »
Hi c_joerg,          What do you mean by the "exposure step bar"?Thanks,..... john
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Offline c_joerg

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Re: polarizer effectiveness with SX100
« Reply #3 on: 19 / July / 2019, 14:27:53 »
This picture is from my S110.….
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M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), S45,
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Offline srsa_4c

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Re: polarizer effectiveness with SX100
« Reply #4 on: 19 / July / 2019, 15:19:28 »
Quote from: c_joerg on 19 / July / 2019, 14:27:53
This picture is from my S110.….
That's not available on sx100.

So, alternatives while the cam is in M mode with fixed ISO:
- exposure hint in half press (on the Canon OSD)
- Bv (brightness value) on the CHDK Misc values display
- CHDK histogram
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Offline c_joerg

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Re: polarizer effectiveness with SX100
« Reply #5 on: 19 / July / 2019, 17:40:58 »
Quote from: srsa_4c on 19 / July / 2019, 15:19:28
That's not available on sx100.
Ok, I have read over the x  ;)
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M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), 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 shinnen

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Re: polarizer effectiveness with SX100
« Reply #6 on: 20 / July / 2019, 13:15:42 »
Hi c_joerg,        I don't see that on my camera...... john
Quote from: c_joerg on 19 / July / 2019, 14:27:53
This picture is from my S110.….
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Offline c_joerg

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Re: polarizer effectiveness with SX100
« Reply #7 on: 21 / July / 2019, 05:45:33 »
Quote from: shinnen on 20 / July / 2019, 13:15:42
Hi c_joerg,        I don't see that on my camera...... john
Quote from: c_joerg on 19 / July / 2019, 14:27:53
This picture is from my S110.….
Yes, I know. I Thought you have a S100. Follow Reply #4
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M100 100a, M3 121a, G9x II (1.00c), 2*G1x (101a,100e), S110 (103a), SX50 (100c), SX230 (101a), 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 shinnen

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Re: polarizer effectiveness with SX100
« Reply #8 on: 21 / July / 2019, 16:40:36 »
OK ........ john
Quote from: c_joerg on 21 / July / 2019, 05:45:33
Quote from: shinnen on 20 / July / 2019, 13:15:42
Hi c_joerg,        I don't see that on my camera...... john
Quote from: c_joerg on 19 / July / 2019, 14:27:53
This picture is from my S110.….
Yes, I know. I Thought you have a S100. Follow Reply #4
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