sam james

sam james

Lives in Australia nsw, Australia
Works as a video artist
Joined on Jan 31, 2006

Comments

Total: 5, showing: 1 – 5
On Sony Alpha 7S in low-light: See video at ISO 409,600 article (244 comments in total)
In reply to:

sam james: I am a professional video person and what I am noticing is at ISO 3200 the compression artefacts seem quite visible, comparable to the older 5D Mk2. The 5D Mk3 was about 1 stop faster so this kind of noise would only be visible at about ISO6400. Then what we see in this video is that once the brightness is lifted at around 25,000 ISO the noise issues are less obvious because noise is always more visible on darker areas. I definitely agree that this seems to be shot to underexpose at ISO1600 to amplify the difference at 400,000 ISO. My guess would be that we could actually see quite a lot at the Sony's 1600ISO with not too much noise and the ISO above about 12800 would not really be necessary.
Anyway, it looks good, not dissing this camera! Though my Canon c100 has less noise than this at all of the ISO levels up to 52,000 though so I'm not totally amazed!

Yes I'm comparing the usual compression artefacts of a C100 full HD video to h.264 at the highest bitrate then uploaded to youtube to this which I assume is the same process - so I was comparing the artefacts (produced by noise) between both after compression. As most delivery is on the web this is the comparison I'm making.
I guess generally I'm agreeing that the man seems to be able to see perfectly well in what appears to be pitch black in the ISO1600 shot but normally from this kind of light I would expect more dynamic range and visible image at 1600/f2.8. Maybe I'm used to the Canon 5D3..

Direct link | Posted on Apr 14, 2014 at 00:08 UTC
On Sony Alpha 7S in low-light: See video at ISO 409,600 article (244 comments in total)

I am a professional video person and what I am noticing is at ISO 3200 the compression artefacts seem quite visible, comparable to the older 5D Mk2. The 5D Mk3 was about 1 stop faster so this kind of noise would only be visible at about ISO6400. Then what we see in this video is that once the brightness is lifted at around 25,000 ISO the noise issues are less obvious because noise is always more visible on darker areas. I definitely agree that this seems to be shot to underexpose at ISO1600 to amplify the difference at 400,000 ISO. My guess would be that we could actually see quite a lot at the Sony's 1600ISO with not too much noise and the ISO above about 12800 would not really be necessary.
Anyway, it looks good, not dissing this camera! Though my Canon c100 has less noise than this at all of the ISO levels up to 52,000 though so I'm not totally amazed!

Direct link | Posted on Apr 13, 2014 at 01:19 UTC as 22nd comment | 6 replies
On CP+ 2014: Canon stand report article (59 comments in total)

wow, its seriously ugly though, pity.. looks like Frankenstein. If they're trying to angle for M4/3 market with this, that's a pretty 'style' oriented market and this is really quite awful to look at.
Hey, look at my new Canon G1X2 - ewwww

Direct link | Posted on Feb 14, 2014 at 08:05 UTC as 15th comment
On With that glass of red wine challenge (4 comments in total)

I see these challenges are a judgement of technical proficiency, not subjectivity or mood. Often the number 1 shot is a great, jump out of the page image, but many more interesting shots are relegated to low ranks in this type of forum. Too much about photography and not enough about art.

Direct link | Posted on May 20, 2012 at 01:09 UTC as 1st comment
On First full-res Fujifilm X-Pro1 images appear on the web article (216 comments in total)
In reply to:

Paul_B Midlands UK: Blimey those are dreary images for a wonderful landscape that Australia has to offer. I'd be pressing the DEL button after taking phots like that.

I find these images quite worthy in terms of judging the aesthetics and potential of the camera. I liked the before and after landscape shots to guage the neutrality of Fuji's sensor and the potential for grading afterwards. Compared to the X10 for example this seems to have great dynamic range, thanks for these samples.

Direct link | Posted on Feb 2, 2012 at 00:50 UTC
Total: 5, showing: 1 – 5