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DR.JUAN
Joined: 08 Feb 2013
Posts: 661
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 Posted: Mon Jan 20, 2014 7:24 pm Post subject: nex 5n and ISO differences |
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DR.JUAN wrote:
Anybody can tell me the differences in IQ (sharpness, colors, contrast) between use iso 100, 200 and 400 for general use and street's portraits in daylight with sony nex 5n.
I tried but can't see any. Only with iso 400 better sharpness cos fast shutter used.
Iso 400 degrade image? |
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philslizzy
Joined: 07 Aug 2012
Posts: 4744
Location: Cheshire, England
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| Posted: Mon Jan 20, 2014 8:43 pm Post subject: |
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philslizzy wrote:
The base ISO is that which has no noise-increasing gain applied. Gain = higher ISO. so it's 100 on the NEX.
Check out these tests
http://www.cameralabs.com/reviews/Sony_Alpha_NEX_5N/high_ISO_noise.shtml
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DR.JUAN
Joined: 08 Feb 2013
Posts: 661
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| Posted: Mon Jan 20, 2014 11:03 pm Post subject: |
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DR.JUAN wrote:
Thank you, philslizzy
Very informative site. That i saw there was similar to my experience.
Three iso are very usuable. |
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Pontus
Joined: 18 Dec 2011
Posts: 1471
Location: Jakobstad, Finland
Expire: 2016-08-25
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| Posted: Tue Jan 21, 2014 6:49 am Post subject: |
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Pontus wrote:
I use ISO 400 without thinking much about it. For critical work I try to use ISO 100 but I don't see much if any real life difference.
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Rick1779
Joined: 17 May 2013
Posts: 1207
Location: Italy
Expire: 2014-06-06
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| Posted: Tue Jan 21, 2014 10:36 am Post subject: |
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Rick1779 wrote:
I mainly shot in AUTO ISO when doing street
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DR.JUAN
Joined: 08 Feb 2013
Posts: 661
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| Posted: Tue Jan 21, 2014 2:10 pm Post subject: |
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DR.JUAN wrote:
| Rick1779 wrote: |
| I mainly shot in AUTO ISO when doing street |
At iso 800 or 1600, do you note some artifacts? |
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Rick1779
Joined: 17 May 2013
Posts: 1207
Location: Italy
Expire: 2014-06-06
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| Posted: Tue Jan 21, 2014 2:28 pm Post subject: |
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Rick1779 wrote:
Note that I shot in raw since I don't like much the high iso jpgs and I prefer to work on raw directly, said that I try to stay at 1600 ISO max, unfortunately the nex5n doesn't allow to set the range of Auto ISO 
This is a 1250 ISO http://www.telltale.it/wp-content/uploads/2013/09/Asociaci%C3%B3n-Cordobesa-de-Artesanos-ZOCO.jpg
1250 ISO again http://www.telltale.it/wp-content/uploads/2013/08/DSC5291.jpg
2500 ISO shot http://www.telltale.it/wp-content/uploads/2014/01/DSC7147.jpg
3200 ISO http://www.telltale.it/wp-content/uploads/2013/08/DSC5282bn.jpg
12.800 ISO http://www.telltale.it/wp-content/uploads/2013/09/DSC5552.jpg
As a general rule when I work on shots above 1600 I try to denoise a little bit in Lightroom then I manually add some "Film grain" (for example with the VSCO Preset) to compensate the digital noise with a more "natural" grainy noise as you can see in the BN shot of the Mezquita in Cordoba
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Rick1779
Joined: 17 May 2013
Posts: 1207
Location: Italy
Expire: 2014-06-06
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| Posted: Tue Jan 21, 2014 2:31 pm Post subject: |
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Rick1779 wrote:
| DR.JUAN wrote: |
| Rick1779 wrote: |
| I mainly shot in AUTO ISO when doing street |
At iso 800 or 1600, do you note some artifacts? |
anyway If you need I can take some test with different ISO range
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TELLTALE
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DR.JUAN
Joined: 08 Feb 2013
Posts: 661
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| Posted: Tue Jan 21, 2014 9:53 pm Post subject: |
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DR.JUAN wrote:
| Rick1779 wrote: |
| DR.JUAN wrote: |
| Rick1779 wrote: |
| I mainly shot in AUTO ISO when doing street |
At iso 800 or 1600, do you note some artifacts? |
anyway If you need I can take some test with different ISO range |
Thanks Rick1779. But don't have that effort because me. I know that the test should be very interesting, informative and formative.
It' s your time, not mine. Thanks again. |
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Aanything
Joined: 27 Aug 2011
Posts: 2187
Location: Piacenza, Italy
Expire: 2014-05-30
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| Posted: Tue Jan 21, 2014 10:03 pm Post subject: |
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Aanything wrote:
For me it's perfectly safe up to iso 400, very good at 800, more than usable at 1600.
My a55 (and all the dslr's I used, except a K-5) at 800 looks worse than the nex5n at 1600.
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DR.JUAN
Joined: 08 Feb 2013
Posts: 661
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| Posted: Tue Jan 21, 2014 10:11 pm Post subject: |
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DR.JUAN wrote:
Thank you. Very formative. |
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DR.JUAN
Joined: 08 Feb 2013
Posts: 661
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| Posted: Tue Jan 21, 2014 10:13 pm Post subject: |
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DR.JUAN wrote:
| Aanything wrote: |
For me it's perfectly safe up to iso 400, very good at 800, more than usable at 1600.
My a55 (and all the dslr's I used, except a K-5) at 800 looks worse than the nex5n at 1600. |
Thank for sharing your experience. Very useful |
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Rick1779
Joined: 17 May 2013
Posts: 1207
Location: Italy
Expire: 2014-06-06
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| Posted: Wed Jan 22, 2014 2:26 pm Post subject: |
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Rick1779 wrote:
| DR.JUAN wrote: |
| Rick1779 wrote: |
| DR.JUAN wrote: |
| Rick1779 wrote: |
| I mainly shot in AUTO ISO when doing street |
At iso 800 or 1600, do you note some artifacts? |
anyway If you need I can take some test with different ISO range |
Thanks Rick1779. But don't have that effort because me. I know that the test should be very interesting, informative and formative.
It' s your time, not mine. Thanks again. |
here you are some test shot, all taken at f8 except ISO 3200 (F11) and ISO 6400 (F16)
all taken with the trioplan 50/2.9, the one I got attached to the nex5n at that moment
All shots are full size RAW converted with Lightroom without any PP
click to enlarge 
100 ISO
200 ISO
400 ISO
800 ISO
1600 ISO
3200 ISO
6400 ISO
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DR.JUAN
Joined: 08 Feb 2013
Posts: 661
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| Posted: Thu Jan 23, 2014 12:25 am Post subject: |
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DR.JUAN wrote:
Thank you!
The images speack by themselves. |
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Rick1779
Joined: 17 May 2013
Posts: 1207
Location: Italy
Expire: 2014-06-06
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| Posted: Thu Jan 23, 2014 8:31 am Post subject: |
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Rick1779 wrote:
you're welcome 
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ForenSeil
Joined: 15 Apr 2011
Posts: 2726
Location: Kiel, Germany.
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| Posted: Thu Jan 23, 2014 8:36 pm Post subject: |
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ForenSeil wrote:
My painlevel was ISO3200 with the 5N in for lowlight, ~ISO 1250 for sports or similar, critical work ISO400.
NEX-5N is about one stop better than NEX-3 and NEX-5
How strong noise looks is always a matter of dynamic range and exposure of your subject. With wrong exposure balance even ISO800 can look very noisy.
With correct technique and under right circumstances even NEX-3 can deliver usable results even at ultra high ISOs like 12800:
(F2.8, 16mm, ISO12800, straight OOC JPEG)
Under good light conditions even 100% crops can look quite nice and detailed, here ISO1000 on NEX-C3 (similar sensor to 5N)
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DR.JUAN
Joined: 08 Feb 2013
Posts: 661
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| Posted: Thu Jan 23, 2014 9:41 pm Post subject: |
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DR.JUAN wrote:
Thank you, ForenSeil.
Your work did think again about mine. |
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