Sometimes beautiful things happen above your head.
I tried to find out what the impact of the ISO on video on the Nex-7, so I cycled through with the lens cap on. The noise was not that visible so I tried to do what you usually try to avoid. I added brightness and sharpening.
Let me know, what you think. For me it prooves my experiences, that videos start get noisy with ISO bigger than 800.
When the weather is not that good outside, what do you do? I decided to play around with a snippet of video and try out some compositing with video.
What did I try? I wanted a piece of text to move with something in the background and vanish behind a piece of foreground.
So what did I learn?
- Next time I use only stabilized imagery – the handheld footage is good enough for the poc (proof of concept).
- I have to work on the 3d-text effect, it still has its problems.
- I have to work on the synchronisation of the movement of background and foreground.
But enough talk – here is the video. I’ll be outside….
So I made some further observations after the first review yesterday. I also got a message telling me that other and more detailed shots are needed to see. So here we go. Below you will find the corner and center crops from shots I took today in the morning. The shots were made handheld and the ISO was limited to 100. First the center shots of a street scene using apertures 2.8, 4 and 8 As you can see, the center gets sharper at f/4 to soften up at f/8. Next you will see the details in the upper right corner. As you can notice there is a slight purple fringing which gets softer when the lens is stepped down. Strangely enough the shot at f/4 is not sharp. I think the branch has moved in the wind, but the wall looks sharper.You can find the full SOOC shots here. As a conclusion I have to say, that for me the lens is very fine wide open. I haven’t considered if I prefer f/8 or f/16 for my night cityscapes. What still is strange to me is that the lens falls in to a resting position when turned off with a hearable soft *tock*. What I have not tested by now is the fact, that the lens seems to take long to “boot” – the Iris is closed and opens wide only to get stepped into positions. I will save this for the next blog entry. If you have questions you can also leave a comment. @Edit20120420: A reader mentioned that he thinks the blurriness at f/4 in the corner could be due to the exhaust of the truck you see. This sounds reasonable as everything is a little bit blurry in that corner.