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disable F707 Noise Reduction (astro)

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Eddie Lin

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Hi: I am interested in using F707 for astro photography, NR is nice, but costs twice the time. That is a lot of time for 30 seconds exposure. Can I disable the in-camera NR and do it later in PC ? Of course I am assuming the dark frame does not change much over time.

While I am on this topic, How about using the night shot mode, i.e. removing the IR filter, for long time exposure ?

Thanks -- Eddie
 
Eddie Lin said:
Hi: I am interested in using F707 for astro photography, NR is
nice, but costs twice the time. That is a lot of time for 30
seconds exposure. Can I disable the in-camera NR and do it later
in PC ? Of course I am assuming the dark frame does not change much
over time.
Click to expand...
Use aperture priority mode. There is no NR there.

Dark frame does change over time, primairily due to ambient temperature change, self-heating producing temperature gradients, heat from your hands, etc.

--
Vladimir.
 
Hello!

Is NR only disabled in aperture-priority, or in full manual too?
 
Vlad........were did you find this out.......I have read the manual back to front..............did I miss something ?

I thought the noise reduction only kicked in when shutter speeds fell below a certain setting.
Vladimir Koifman said:
Bloom said:
Is NR only disabled in aperture-priority, or in full manual too?
Click to expand...
Only in aperture priority.

--
Vladimir.
Click to expand...
--
http://www.fototime.com/inv/757AE7C15569148
You only live once ,and always suck the lemon.

have a nice day and don't loose your head, it will show your lack of maturity and your age.
 
Thanks. I can live with it(AP mode). You are right, however, after heat reaching equilibrium, post subtraction is OK with Oly 2000Z (I usually took dark frame every 30 minutes).

Eddie.
Vladimir Koifman said:
Eddie Lin said:
Hi: I am interested in using F707 for astro photography, NR is
nice, but costs twice the time. That is a lot of time for 30
seconds exposure. Can I disable the in-camera NR and do it later
in PC ? Of course I am assuming the dark frame does not change much
over time.
Click to expand...
Use aperture priority mode. There is no NR there.

Dark frame does change over time, primairily due to ambient
temperature change, self-heating producing temperature gradients,
heat from your hands, etc.

--
Vladimir.
Click to expand...
 
The Noise Reduction mode is only active when you are in a mode where you can actually control the shutter speed... which means either Shutter Priority or else Manual mode. At that time, you will see the "NR" symbol next to the shutter speed. It will appear at speeds of only 2.5s or slower.

The "problem" with A-P is that the slowest shutter speed is only 8s.
eric noack said:
Vlad........were did you find this out.......I have read the manual
back to front..............did I miss something ?
I thought the noise reduction only kicked in when shutter speeds
fell below a certain setting.
Click to expand...
 
Thanks Ulysses,......one other thing, there is a symbol that often appears in blue at the bottom right hand corner of the LCD screen.......what is it telling me ?
Ulysses said:
The "problem" with A-P is that the slowest shutter speed is only 8s.
eric noack said:
Vlad........were did you find this out.......I have read the manual
back to front..............did I miss something ?
I thought the noise reduction only kicked in when shutter speeds
fell below a certain setting.
Click to expand...
Click to expand...
--
http://www.fototime.com/inv/757AE7C15569148
You only live once ,and always suck the lemon.

have a nice day and don't loose your head, it will show your lack of maturity and your age.
 
Heheheheh... you mean the "Jog Dial" symbol?????

Telling you that you can engage the Jog dial to change that particular parameter.
eric noack said:
Thanks Ulysses,......one other thing, there is a symbol that often
appears in blue at the bottom right hand corner of the LCD
screen.......what is it telling me ?
Click to expand...
--

Ulysses
 
Eddie Lin said:
Hi: I am interested in using F707 for astro photography, NR is
nice, but costs twice the time. That is a lot of time for 30
seconds exposure. Can I disable the in-camera NR and do it later
in PC ? Of course I am assuming the dark frame does not change much
over time.
Click to expand...
You really don't want to disable NR on long exposure pictures (you can't disable it with the F707) or you will have noise "stars" all over the image. See:
http://www.dpreview.com/learn/Glossary/Digital_Imaging/Noise_Reduction_01.htm

If you are interested in long exposure astro pix you will need a film camera or a cooled focal plane digital setup (and we're talking dry ice or colder temperatures). A cooled film setup is much better than ambient temperature film because long exposure reciprocity failure is reduced as temperature goes down. The dark frame NR changes with temperature, exposure time and the whim of the gods.
--
Bobbo
 
I thought it was a flying saucer or an up turned soup bowl :)
Ulysses said:
Telling you that you can engage the Jog dial to change that
particular parameter.
eric noack said:
Thanks Ulysses,......one other thing, there is a symbol that often
appears in blue at the bottom right hand corner of the LCD
screen.......what is it telling me ?
Click to expand...
--

Ulysses
Click to expand...
--
http://www.fototime.com/inv/757AE7C15569148
You only live once ,and always suck the lemon.

have a nice day and don't loose your head, it will show your lack of maturity and your age.
 
I agree that I need to do NR. But would like to have a choice of doing it on desk instead of losing half of the field time under clear sky. I have done it on Olympus 2020Z with good result and wish Sony would provide similar trick. The temperature variation is important, that's why I took dark frame every 30 minutes at the same exposure time.

It sounds like I can only take 8 seconds exposure (in AP mode) without NR on Sony.

Eddie
Bobbo said:
Eddie Lin said:
Hi: I am interested in using F707 for astro photography, NR is
nice, but costs twice the time. That is a lot of time for 30
seconds exposure. Can I disable the in-camera NR and do it later
in PC ? Of course I am assuming the dark frame does not change much
over time.
Click to expand...
You really don't want to disable NR on long exposure pictures (you
can't disable it with the F707) or you will have noise "stars" all
over the image. See:
http://www.dpreview.com/learn/Glossary/Digital_Imaging/Noise_Reduction_01.htm
If you are interested in long exposure astro pix you will need a
film camera or a cooled focal plane digital setup (and we're
talking dry ice or colder temperatures). A cooled film setup is
much better than ambient temperature film because long exposure
reciprocity failure is reduced as temperature goes down. The dark
frame NR changes with temperature, exposure time and the whim of
the gods.
--
Bobbo
Click to expand...
 
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