Can this tennis racquet be this flexible or is this caused by rolling shutter?
Aug 10, 2021 16:40:40 #
Vernon Gibson
Loc: Madison, AL
I play a lot of tennis and I know some tennis racquets are more flexible than others but never seen one do this. I have seen pictures of golf clubs whipping to an extreme degree and wonder if those are the effects of rolling shutter. This picture was taken at 1/1000 second with a Sony A7RM4 using a Tamron 28-200 lens. 1/1000 of a second was always fast enough for me on a Nikon DSLR but maybe using a mirrorless camera is different? I have noticed the EV on the A7RM4 will distort things like propeller blades spinning so maybe this is the same effect? Aperture was 5.6 and ISO 250. I have other pictures of the same model racquet used by a different player and those pictures show the same whippy effect. Any explanation or suggestions will be much appreciated!
Aug 10, 2021 16:59:03 #
Aug 10, 2021 16:59:23 #
Aug 10, 2021 17:15:46 #
Vernon, my money is on rolling shutter.
--Bob
--Bob
Vernon Gibson wrote:
I play a lot of tennis and I know some tennis racq... (show quote)
Aug 10, 2021 17:32:20 #
Vernon Gibson wrote:
I play a lot of tennis and I know some tennis racq... (show quote)
What a catch ⭐⭐⭐
Aug 10, 2021 17:39:13 #
Excellent shot
If it was a rolling shutter wouldn't more than just the racket be affected?
If it was a rolling shutter wouldn't more than just the racket be affected?
Aug 10, 2021 17:54:46 #
tramsey wrote:
Excellent shot
If it was a rolling shutter wouldn't more than just the racket be affected?
If it was a rolling shutter wouldn't more than just the racket be affected?
I don't think so. The head of the racquet is, by far, the fastest moving object in the pic, which would put the head and upper shaft in different places, even during the 1,000th of a second the shutter is open.
Aug 10, 2021 18:07:59 #
RichinSeattle wrote:
I don't think so. The head of the racquet is, by far, the fastest moving object in the pic, which would put the head and upper shaft in different places, even during the 1,000th of a second the shutter is open.
I know nothing about rolling shutters, all new to me. But what you said makes a lot of sense thanks for clearing that up for me.
Aug 10, 2021 18:35:11 #
Vernon Gibson
Loc: Madison, AL
Thanks, guys! What do I need to do to tamp down this distortion? Double the shutter speed? But then rats, I have to worry about noise. I could not get as close to the players as I would have liked. Funny I've never had this happen on my old fashion Nikon D3300. I really was beginning to suspect the racquet as it was very popular in this particular tournament. Here's a similar shot, same camera settings, same racquet but different player...
Aug 10, 2021 19:01:10 #
Vernon Gibson wrote:
Thanks, guys! What do I need to do to tamp down this distortion? ... Here's a similar shot, same camera settings, same racquet but different player...
I don't know what a "rolling shutter" is, vs. any other kind, but it's obvious that the top of this pic was exposed before the lower portions. The exposure time of each portion of the pic is 1,000th sec., but the total exposure time seemingly is much slower. A tennis serve begins with the racquet head behind the players head. As she swings through the serve, the lower portions of the shaft are moving forward, making the racquet appear to be bending. As far as I know, the shutters on my old Nikon F and my new D850 move side to side, rather than top to bottom. Those of you who better understand the mechanics of a camera can probably verify or correct my theory. (BTW, these are excellent action shots.)
Aug 10, 2021 19:24:38 #
Comment continued, a couple more clues: Draw a straight line from her hand (the racquet handle is, of course, straight); the racquet head should be only a couple inches (instead of over a foot) from the ball. Then, look at her eyes; she is no longer looking at the ball, which, by the time the shutter exposes her face, is on its way toward the opponent.
Solution: Don't use the Sony for action shots; go back to your DSLRs.
Solution: Don't use the Sony for action shots; go back to your DSLRs.
Aug 10, 2021 20:50:39 #
Aug 10, 2021 21:05:09 #
tramsey wrote:
I know nothing about rolling shutters, all new to me. But what you said makes a lot of sense thanks for clearing that up for me.
Electronic shutters in all but a few Sony cameras scan vertically line by line. Whatever moves faster than the scan shows up like this example.
Aug 10, 2021 21:31:05 #
burkphoto wrote:
Electronic shutters in all but a few Sony cameras scan vertically line by line. Whatever moves faster than the scan shows up like this example.
Well, that means that your shutter speed setting is meaningless. How long does it take this "electronic shutter" to complete its scan. It appears from the OP's shots that it takes nearly half a second. That's obviously not what he expected when he bought his fancy, new Sony mirrorless camera. Stick with Nikons (or Canons).
Aug 10, 2021 22:42:13 #
RichinSeattle wrote:
Well, that means that your shutter speed setting is meaningless. How long does it take this "electronic shutter" to complete its scan. It appears from the OP's shots that it takes nearly half a second. That's obviously not what he expected when he bought his fancy, new Sony mirrorless camera. Stick with Nikons (or Canons).
The electronic shutter in most mirrorless cameras is capable of 1/16,000 second or faster speeds, but that’s for EACH raster line. The full image exposure takes longer.
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