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Archive 2014 · Sony A7s image thread.

  
 
snapsy
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p.3 #1 · p.3 #1 · Sony A7s image thread.


jimmy462 wrote:
Hi Snapsy,

I truly enjoy that second image...nice play of foreground visibility vs. starry sky...

It'll be interesting to see where a favorable balance of ISO, aperture and shutter speed will work in extreme-low-light situations. Learning the camera's sensor behaviors at various ISO settings will clearly take some in-the-field testing.

I bring this up because of your settings for that second image...15 sec @ 12,800 ISO (you don't state f/stop). Bumping up the ISO in an attempt to freeze the wave action we get...

8 sec @ 25,600
4 sec @ 51,200
2 sec @ 102,400
1 sec @ 204,800
.5 sec @ 409,600

...and, clearly, one would be
...Show more

Thanks Jimmy. I used a 15 second exposure because that's the shortest exposure which avoids stair trails @ 24mm. The aperture was f/5, which is necessary to get some extra corner sharpness on the 24-70 f/4 FE (24mm is its weakest focal length and it would actually sharpen up even more beyond f/5). The exposure was ETTR by about 1 1/2 stops, which the DR of the scene permitted and so it allowed me to use a higher ISO at the same absolute exposure (same f/stop and shutter) to get a further reduction in shadow noise in that scene.

One thing I noticed is that the A7s has pretty significant hot pixels even at the modest long exposures I used. This was first reported here. I didn't use long-exposure NR because it's not available for the fully-electronic shutter mode I used for the above images (since LENR would require closing the shutter to take the dark frame). I'm using the fully-electronic shutter to avoid the amp noise/glow that occurs on the A7s at ultra low exposures (I compared that here) - I haven't tested whether LENR would remove the amp glow as effectively as the electronic shutter does.



Jul 14, 2014 at 11:58 AM
taran
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p.3 #2 · p.3 #2 · Sony A7s image thread.


28mm ZF.2 @f2

delray 7.14.140857 by artistwithlight, on Flickr



Jul 14, 2014 at 08:46 PM
unravel
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p.3 #3 · p.3 #3 · Sony A7s image thread.


can anyone compare operation speed between A7 and A7s, in particular shutter lag, whether there is any difference at all.


Jul 14, 2014 at 08:57 PM
snapsy
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p.3 #4 · p.3 #4 · Sony A7s image thread.


I've trained my dog to pose for treats. She knows after a certain number of shutter clicks she'll get one. The A7s's silent shutter leaves her confused and underpaid

ISO 12,800 with Voigtlander 40mm Ultron II (Nikon mount). Click here for full-sized 12MP image.
http://horshack.smugmug.com/Animals/My-Dog-Manchester-Terrier/i-DkfvG67/0/X2/dog_523-X2.jpg




Jul 15, 2014 at 12:51 PM
mogul
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p.3 #5 · p.3 #5 · Sony A7s image thread.


Does anyone have experience with 7s and slt adapter for A mount lenses?


Jul 15, 2014 at 01:03 PM
jimmy462
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p.3 #6 · p.3 #6 · Sony A7s image thread.


snapsy wrote:
Thanks Jimmy. I used a 15 second exposure because that's the shortest exposure which avoids stair trails @ 24mm. The aperture was f/5, which is necessary to get some extra corner sharpness on the 24-70 f/4 FE (24mm is its weakest focal length and it would actually sharpen up even more beyond f/5). The exposure was ETTR by about 1 1/2 stops, which the DR of the scene permitted and so it allowed me to use a higher ISO at the same absolute exposure (same f/stop and shutter) to get a further reduction in shadow noise in that scene.

One thing
...Show more

Hi Snapsy,

Thanks for the followup info on your exposures, and for those links about some of the various noise issues. I had read that there was a difference in image noise between Single Shot Silent and Conitnuous modes on this camera...Continuous being about a stop worse...from here...

Sony a7S read noise vs ISO | The Last Word:
http://blog.kasson.com/?p=6172

As for hot pixels during long exposures, none of my Canon's are free of that issue. (Sigh.)

Again, my interests with this camera are its low-light sensitivities...Sony has broken some new ground here...even amongst its own line up. My hope is that Canon will have an answer to this with their new low-light sensor which they announced last year...

Canon Global : News | News Releases:
http://www.canon.com/news/2013/sep12e.html

Demo video found separately here...

Canon 35mm CMOS sensor achieves low-light shooting feat on Vimeo:

" target="_blank" rel="nofollow">



...now THAT would be a shootout I'd like to see! I'll be holding off any purchasing decisions until I see what Canon does between now and springtime.

In the meantime, I'm looking forward to this camera getting into some more hands and seeing this thread populate with such images!

As for the camera's video low light performance, well, after viewing this video I can see I'll be having to do a bit more homework on their Picture Profile 7 SLog settings!...

Sony a7s Low Light Picture Profile test - YouTube:

" target="_blank" rel="nofollow">



Anyhoo, thanks again for the info!
Jimmy G




Jul 17, 2014 at 02:21 PM
furinkazan
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p.3 #7 · p.3 #7 · Sony A7s image thread.


ISO 12800




ISO 32000



Jul 17, 2014 at 03:30 PM
furinkazan
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p.3 #8 · p.3 #8 · Sony A7s image thread.


ISO 100 - I think A7s has a medium frame look





Jul 17, 2014 at 03:31 PM
andreas612
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p.3 #9 · p.3 #9 · Sony A7s image thread.


Furinkazan, what lenses did you use for those shots?


Jul 17, 2014 at 05:09 PM
vipergts831
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p.3 #10 · p.3 #10 · Sony A7s image thread.


FE 55 f/1.8

A7s Test Shots-5 by Prodigy83, on Flickr



Jul 17, 2014 at 09:14 PM
jojomon11
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p.3 #11 · p.3 #11 · Sony A7s image thread.


Viper what is the iso used on that shot? it is very clean ^^^


Jul 17, 2014 at 09:42 PM
furinkazan
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p.3 #12 · p.3 #12 · Sony A7s image thread.


Used Leica M 90mm APO on most of them
The color one is Zony 55mm ( which I think is fantastic )
The wide one ( HK harbour view ) is Leica M 35mm 1.4



Jul 17, 2014 at 11:03 PM
furinkazan
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p.3 #13 · p.3 #13 · Sony A7s image thread.


A7s ISO 40000! on flickr

A7s ISO 12800 on flickr








Jul 19, 2014 at 12:36 PM
furinkazan
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p.3 #14 · p.3 #14 · Sony A7s image thread.


A7s 10000 ISO in color
Sony A7s High ISO by pasuay at gmail dot com, on Flickr



Jul 19, 2014 at 02:08 PM
johntruong
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p.3 #15 · p.3 #15 · Sony A7s image thread.


Just got the A7s and have been extremely impressed with its dynamic range and RAW malleability at high ISOs.

For reference, I shoot professionally with a Canon 1-DX, Nikon D800E and also own the Sony A7r.

I also purchased the 35mm FE Zeiss lens along with the A7s, which was used on this test shot. More to come!



Test shot, Potted Plant, Sony A7s and 35mm FE @ f2.8 by John Truong Pictures, on Flickr



Jul 19, 2014 at 05:00 PM
furinkazan
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p.3 #16 · p.3 #16 · Sony A7s image thread.


Sony A7s High ISO Monochrome
Sony A7s High ISO Monochrome by pasuay at gmail dot com, on Flickr



Jul 20, 2014 at 11:35 AM
dakel
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p.3 #17 · p.3 #17 · Sony A7s image thread.


Keep them coming. I personally am glad to not have to scan through the A7/R thread to see 7S pictures and read about people's experience with them. Cool stuff


Jul 20, 2014 at 12:07 PM
furinkazan
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p.3 #18 · p.3 #18 · Sony A7s image thread.


A7s ISO 16000 color
Sony A7s High ISO Color by pasuay at gmail dot com, on Flickr



Jul 20, 2014 at 12:23 PM
vipergts831
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p.3 #19 · p.3 #19 · Sony A7s image thread.


Some shots with the A7s + FE 55 from over the weekend:

Some street photography:

A7s Test Shots-6 by Prodigy83, on Flickr

Missed the focus but still like it

A7s Test Shots-7 by Prodigy83, on Flickr

A7s Test Shots-8 by Prodigy83, on Flickr

A7s Test Shots-9 by Prodigy83, on Flickr

And an 8 shot pano from the Yankee game today

A7s Test Shots-10 by Prodigy83, on Flickr



Jul 20, 2014 at 10:19 PM
taran
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p.3 #20 · p.3 #20 · Sony A7s image thread.


200mm ai-s, pk-13 ext

delray 7.23.14592 by artistwithlight, on Flickr



Jul 24, 2014 at 12:17 AM
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