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Funky IR Artefact



 
 
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  #11  
Old April 25th 18, 11:04 AM posted to rec.photo.digital
android
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Posts: 3,854
Default Funky IR Artefact

On 2018-04-25 09:14:56 +0000, Whisky-dave said:

On Tuesday, 24 April 2018 17:16:50 UTC+1, android wrote:
On 2018-04-23 17:29:56 +0000, PeterN said:

On 4/23/2018 1:34 AM, android wrote:

[---]
I might just pull the the filter stack out of the EOS M eventually.
Can't be that difficult...

You might lose autofocuse. The near IR light has a different wavelength.


On a mirrorless? Don't think soo...


Yes yuo don;t think so.....

It's the lens that focuses the light whether it's visable, ultraviolet
or infra-red.


You won't lose AF since it's integrated with the capture sensor...
--
teleportation kills

  #12  
Old April 25th 18, 01:07 PM posted to rec.photo.digital
android
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Default Funky IR Artefact

On 2018-04-25 11:32:40 +0000, Whisky-dave said:

On Wednesday, 25 April 2018 11:05:03 UTC+1, android wrote:
On 2018-04-25 09:14:56 +0000, Whisky-dave said:

On Tuesday, 24 April 2018 17:16:50 UTC+1, android wrote:
On 2018-04-23 17:29:56 +0000, PeterN said:

On 4/23/2018 1:34 AM, android wrote:

[---]
I might just pull the the filter stack out of the EOS M eventually.
Can't be that difficult...

You might lose autofocuse. The near IR light has a different wavelength.

On a mirrorless? Don't think soo...

Yes yuo don;t think so.....

It's the lens that focuses the light whether it's visable, ultraviolet
or infra-red.


You won't lose AF since it's integrated with the capture sensor...


do you even know what AF is let alone what IR is ?

https://photo.stackexchange.com/ques...d-for-focusing


Did you read that article? A mirrorless ain't a DSLR...
--
teleportation kills

  #13  
Old April 25th 18, 01:07 PM posted to rec.photo.digital
android
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Posts: 3,854
Default Funky IR Artefact

On 2018-04-25 11:31:01 +0000, Whisky-dave said:

How can you take an IR photograph while yuor camera has an IR filter to
cut out IR from getting to the sensor.


Do some thinking...
--
teleportation kills

  #14  
Old April 26th 18, 04:28 AM posted to rec.photo.digital
Eric Stevens
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Posts: 12,391
Default Funky IR Artefact

On Wed, 25 Apr 2018 05:32:11 -0700 (PDT), Whisky-dave
wrote:

On Wednesday, 25 April 2018 13:07:56 UTC+1, android wrote:
On 2018-04-25 11:31:01 +0000, Whisky-dave said:

How can you take an IR photograph while yuor camera has an IR filter to
cut out IR from getting to the sensor.


Do some thinking...


come on then tell me how IR gets through the lens to the camera sensor and through the IR filter that is on the sensor so it doesn't reposnd to IR 'light'

All he has to do is travel towards the subject at a speed sufficiently
high to shift the IR into the visible part of the spectrum.

He will need to use a high shutter speed.
--

Regards,

Eric Stevens
  #15  
Old April 26th 18, 04:38 AM posted to rec.photo.digital
android
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Posts: 3,854
Default Funky IR Artefact

On 2018-04-26 03:28:01 +0000, Eric Stevens said:

All he has to do is travel towards the subject at a speed sufficiently
high to shift the IR into the visible part of the spectrum.

He will need to use a high shutter speed.


Focusing with a mirrorless is like focusing a view camera using the
ground glass since the AF sensors are embedded in the capture one. The
same goes for MF shooting too, of course since that what you see
through the EVF or Lieve View is that that is captured by the sensor.
C'mon, you know better than trying to support Dense Dave on this...
--
teleportation kills

  #16  
Old April 26th 18, 09:58 AM posted to rec.photo.digital
Eric Stevens
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Posts: 12,391
Default Funky IR Artefact

On Thu, 26 Apr 2018 05:38:56 +0200, android wrote:

On 2018-04-26 03:28:01 +0000, Eric Stevens said:

All he has to do is travel towards the subject at a speed sufficiently
high to shift the IR into the visible part of the spectrum.

He will need to use a high shutter speed.


Focusing with a mirrorless is like focusing a view camera using the
ground glass since the AF sensors are embedded in the capture one. The
same goes for MF shooting too, of course since that what you see
through the EVF or Lieve View is that that is captured by the sensor.
C'mon, you know better than trying to support Dense Dave on this...


I hadn't followed this to the point where I had picked up that it was
a mirrorless camera.
--

Regards,

Eric Stevens
  #17  
Old April 26th 18, 10:35 AM posted to rec.photo.digital
android
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Posts: 3,854
Default Funky IR Artefact

On 2018-04-26 08:58:38 +0000, Eric Stevens said:

On Thu, 26 Apr 2018 05:38:56 +0200, android wrote:

On 2018-04-26 03:28:01 +0000, Eric Stevens said:

All he has to do is travel towards the subject at a speed sufficiently
high to shift the IR into the visible part of the spectrum.

He will need to use a high shutter speed.


Focusing with a mirrorless is like focusing a view camera using the
ground glass since the AF sensors are embedded in the capture one. The
same goes for MF shooting too, of course since that what you see
through the EVF or Lieve View is that that is captured by the sensor.
C'mon, you know better than trying to support Dense Dave on this...


I hadn't followed this to the point where I had picked up that it was
a mirrorless camera.


The EOS M series are mirrorless. I have an original M, Dense Dave has a
M3 and Davoud a M5, for example.... In live view it's strictly WYSIWYG.
The light level geting to the sensor is too low for AF though while
using the gap between the IR cut of filter in camera and the screw on
one that cuts of visible light, 760nm in my case.
A converted camera should be able to use AF, if the conversion can be
done without damaging it, I e double pixel AF sensors. The live view,
in any camera will make the rear pannel, or EVF to work like ground
glass and thus correctly show actual focus.
--
teleportation kills

  #18  
Old April 26th 18, 10:36 AM posted to rec.photo.digital
android
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Posts: 3,854
Default Funky IR Artefact

On 2018-04-26 09:08:41 +0000, Whisky-dave said:

ya thick ****er.


Oki...
--
teleportation kills

  #19  
Old April 26th 18, 01:01 PM posted to rec.photo.digital
android
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Posts: 3,854
Default Funky IR Artefact

On 2018-04-26 11:35:43 +0000, Whisky-dave said:

?????
which of the canon M series has double pixel AF sensors. ?


The M5. It's also called Dual Pixel Autofocus, DPAF.

http://www.learn.usa.canon.com/resources/articles/2017/intro-to-dual-pixel-autofocus.shtml

--
teleportation kills

  #20  
Old April 26th 18, 03:22 PM posted to rec.photo.digital
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Posts: 21,953
Default Funky IR Artefact

In article ,
Whisky-dave wrote:


Focusing with a mirrorless


Cameras don't use the mirrors to focus the image,


slrs have a secondary mirror behind the main mirror for the autofocus
system to work, which has its own sensor.

mirrorless focus using the main sensor.
 




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