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nex 5n and ISO differences
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PostPosted: Mon Jan 20, 2014 7:24 pm    Post subject: nex 5n and ISO differences Reply with quote
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?


PostPosted: Mon Jan 20, 2014 8:43 pm    Post subject: Reply with quote
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


PostPosted: Mon Jan 20, 2014 11:03 pm    Post subject: Reply with quote
Thank you, philslizzy

Very informative site. That i saw there was similar to my experience.

Three iso are very usuable.


PostPosted: Tue Jan 21, 2014 6:49 am    Post subject: Reply with quote
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.


PostPosted: Tue Jan 21, 2014 10:36 am    Post subject: Reply with quote
I mainly shot in AUTO ISO when doing street


PostPosted: Tue Jan 21, 2014 2:10 pm    Post subject: Reply with quote
Rick1779 wrote:
I mainly shot in AUTO ISO when doing street


At iso 800 or 1600, do you note some artifacts?


PostPosted: Tue Jan 21, 2014 2:28 pm    Post subject: Reply with quote
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 Confused

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


PostPosted: Tue Jan 21, 2014 2:31 pm    Post subject: Reply with quote
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


PostPosted: Tue Jan 21, 2014 9:53 pm    Post subject: Reply with quote
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.


PostPosted: Tue Jan 21, 2014 10:03 pm    Post subject: Reply with quote
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.


PostPosted: Tue Jan 21, 2014 10:11 pm    Post subject: Reply with quote
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 Confused

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


Thank you. Very formative.


PostPosted: Tue Jan 21, 2014 10:13 pm    Post subject: Reply with quote
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


PostPosted: Wed Jan 22, 2014 2:26 pm    Post subject: Reply with quote
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 Cool

100 ISO


200 ISO


400 ISO


800 ISO


1600 ISO


3200 ISO


6400 ISO


PostPosted: Thu Jan 23, 2014 12:25 am    Post subject: Reply with quote
Thank you!

The images speack by themselves.


PostPosted: Thu Jan 23, 2014 8:31 am    Post subject: Reply with quote
you're welcome Wink


PostPosted: Thu Jan 23, 2014 8:36 pm    Post subject: Reply with quote
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)



PostPosted: Thu Jan 23, 2014 9:41 pm    Post subject: Reply with quote
Thank you, ForenSeil.

Your work did think again about mine.
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