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chin:
[Updated 6-Aug-09]

This thread was "New Toy - High Speed Photography with Casio EX-FC100".

Instead of making new topics each time showing new toys, I may as well combine the camera, computer, hifi related topics into one thread for showing new gadgets.

這是相機，音響，電腦等有關新玩具的相片。

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In our last trip to Kun Ming, I have taken more than 600 golf pictures trying to capture the magic moment, like when the club head impacts the ball. But there was no luck - the closest was right after impact. See pictures at Spring City Resort in Yunnan.

My normal camera is a Sony A900 digital SLR. The most used lens is the 24-70mm/2.8 zoom, which was used in perhaps 90% of the Spring City pictures. This camera + lens combo weights perhaps 2kg! My other lenses are all top quality Sony (or formerly Minolta) G series or Zeiss lenses, thus all glass and heavy, and I already have more lenses than I can carry. I also have a light 265g point-and-shot Panasonic LX3 which supposedly has good optics for the small size.

In Spring City, I was using high speed continuous shots with the A900 at 5 frames per second. For golf, this is simply not fast enough. After examining the pictures closely, I realized that the "action" part of a normal golf swing takes perhaps less than 1/2 second, so for each series of high speed shots, only 2 or 3 frames captured the swing in action.

After seeing the advertisement promoting the high speed photography feature, and hearing some comment from my friend, I went to Man Shing and bought the Casio EX-FC100 on Monday, and brought the new toy to golf on Tuesday.

I am too lazy to take picture of the FC100 itself, so thes following are product pictures from dcfever
http://www.dcfever.com/news/readnews.php?id=2723

chin:
First some "normal" pictures.

This picture is taken in the Auto Mode, using normal speed. The quality is unremarkable. This picture is shrank 25% on each dimension, thus only 1/16 the size of the "original size".

The 2nd picture is a "blow up" at 100%, or original size, shows high noise level even at the supposedly best quality ISO100. The resolution is also poor, the flag on the green is almost invisible.

chin:
Picture taken with High Speed Anti-Shake mode.

Casio is capitalizing on the high speed hardware/software built into this camera. One of the fancy, pre-defined shooting modes is the High Speed Anti-Shake which take 30 pictures in one-go, then combine the pictures to form a new image with more details.

This is an old technique used by astrophotography. We call it stacking. Astrophotographers would take hundreds of pictures of the same celestial body then use specialized software to stack the pictures, hoping the resulting image would contain more details.

The following picture again may looked OK on screen. But if used for print, the effect would probably like the 100% crop that follows.

chin:
Now the High Speed part.

The main advertised feature of this camera, and my main motivation for shelling out HK$3000, is the 30-frame per second shot. To do that, you first hit the high speed button on the top, when ready, press and hold the shutter.

The camera's memory buffer can only hold 30 pictures, so you can take high speed pictures for only 1 second. It took us a few tries to capture the actions in this 1-second window.

At this high speed photo mode, the picture quality is not good, in my opinion. In this sample picture, which is a bit more difficult for most cameras due to the back light, the high noise and lack of resolution are very visible. The pant should be green without any white dots, the shirt should be all white with only some shade of shadow, the arms should have normal skin tone, the edges should be more definite, etc...

The advertisement of this camera trouts the high speed feature in taking pictures of small kids in action. If anyone buying the camera to take pictures of running kids, the result may be very disappointing. The skin tone and facial details may distorted badly except in the most ideal lighting condition. I suspect the picture quality from the high speed shooting is unacceptable for evening/night/in-door use.

So was it a waste of money buying this camera?

chin:
Now, finally the fun stuff...

turned out to be the high speed video shooting. We were shooting video at 210-frame per second mode. This is about 7 times the normal speed. In other words, each 1 second of actual action will be replayed in 7 second, creating a very nice smooth slow motion video.

This high speed video is very ideal to analyse one's golf swing. A complete swing takes about 2 seconds but involves lots of coordination and movement of many body parts. When I see my friend swing, sometime I can see that something is not right, but couldn't point out how and where. With the slow motion video, I can see my problems in over swing on the top, not turning enough, left arm not straight enough upswing and after impact, wrong timing on weight shift, etc...

Sample video from Tuesday's golf (large video file, may take some time to download. More videos in the private section.)
http://chinman.com/uploads/video/20090428_Golf_CIMG0382.AVI

For me, the FC100 is quite useless for the purpose of taking nice good looking pictures. However the high speed shooting can be used for technical analysis and the high speed video could be very useful and fun. I will post more pictures or video if I found good use of it. The biggest problem for using the high speed video is that it requires very bright light. Otherwise the subject will be very dim.

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