sovietjet
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Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 1:21 am

In August I went to the Chicago air show. During the first day I shot in aperture priority mode setting the aperture at f/8 for the most part. This resulted in shutter speeds around 1/500 which in the case of high speed passes resulted in some blurry images. So I decided the second day to shoot in shutter priority and set it to 1/1250. Almost all the images from this day resulted in the aircraft having a fuzzy appearance(sort of like grain), softness, and lack of fine detail and sharpness. This was contrary to what I expected from a high shutter speed. This wasn't the case with the pictures from the first day. Both days I used ISO100. Why is this happening?

I was using a 40D with Canon 100-400L. I can post some example images if it is needed.
 
GimliGlider
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RE: Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 1:53 am

I've had the same experiences with Nikon D80, very frustrating when you try to shoot Mil. jets. Even as fast as 1/500 is too slow, and faster speeds give slight blur around the plane's extremities.
"You could attach that to your house and still go 0-60 in 5 seconds..."
 
scottieprecord
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RE: Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 2:35 am

Well, shooting in shutter priority 1/1250 @ ISO100 with 100-400 L IS probably caused the aperture to open up to 5.6, and if you were shooting anywhere near 400mm, that's a pretty bad combination. This lens often doesn't perform too well at both extremities (long focal length and open aperture).

I'd recommend using Av around 8.0 with ISO100. You could even bump it up to 200 with the 40D; it performs pretty well with higher ISOs. Looking back at airshows this summer, this combination was still giving me a decent 1/640 (~1/1000 with ISO200). Other than a few autofocus problems, I was getting tack-sharp shots with the 40D+100-400 combo shooting F-15s and F-22s in Oshkosh.

Mike
 
NIKV69
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RE: Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 2:48 am

Shooting fighters close up is not easy. I would have to say if you are going to shoot at a low ISO like that for the speed you are trying to capture you better have a steady hand. IMO if you are going to try to capture something moving fast you need to boost up your ISO and use a faster lens. Jacking up the shutter speed will not work.
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sovietjet
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RE: Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 5:15 am

Yes it was at f/5.6 and close to 40mm. I never knew it had quality problems with this combination. Does anyone know why this happens? I didn't raise ISO because it causes grain.

Quoting NIKV69 (Reply 3):
Jacking up the shutter speed will not work.

Good to know. So I shouldn't go above say 1/640 or so?
 
ake0404ar
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RE: Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 11:15 am



Quoting Sovietjet (Reply 4):
I didn't raise ISO because it causes grain.

Grain in pictures is not a bad thing, a.net may not like them, but it is not a bad shot.....ever shot with an ASA 800 film back in the days? ....then we are talking grain!

Vasco
 
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walter2222
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RE: Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 11:59 am



Quoting AKE0404AR (Reply 5):
Grain in pictures is not a bad thing,

 checkmark 

Quoting Scottieprecord (Reply 2):
You could even bump it up to 200 with the 40D; it performs pretty well with higher ISOs.

Indeed, why should we limit ourselves to ISO 100??

This shot was taken with ISO 320, F5.6 & T=1/25s with the 100-400mm @ 100mm (it was a dark, rainy day, light conditions were poor, it was before 8a.m.)

It looks a bit grainy, but it is not that bad (I know, it got accepted because this reg. was new to the database  Smile )


View Large View Medium
Click here for bigger photo!

Photo © Walter Van Bel



Best regards,

Walter
Canon 347d mkII ;-) - EFS10-22mm f/3.5-4.5 USM - EFS18-55mm - EF28-105mm f3.5/4.5 - EF100-400mm f4.5-5.6l IS USM - ...
 
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dvincent
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RE: Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 12:39 pm

I shoot at ISO 200 on nice days, mainly because that's my sensor's native ISO (same with the D300). But I've shot up to ISO 800 with very little visible noise, and it's so easy to clean up without causing noise reduction problems that I do not hesistate to go up to 800.

You'll need a fast shutter speed to freeze the action and prevent motion blur, of course, but if you can get 1/1250 reliably at ISO 400 while keeping your aperture at f/8 you should be able to get some keepers.

Even then you still have to have good panning technique to follow the action.
From the Mind of Minolta
 
NIKV69
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RE: Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 1:53 pm



Quoting Sovietjet (Reply 4):
Good to know. So I shouldn't go above say 1/640 or so?

I think replies 5,6 and 7 have hit the nail on the head. 7 especially. For something moving that fast in abscence of a really fast lens you will have to raise your ISO a little and work on your technique for holding and panning. This way you can get good results with a shutter speed that is not super high.
Hey that guy with the private jet can bail us out! Why? HE CAN AFFORD IT!
 
calisam
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RE: Decrease In Quality With High Shutter Speeds?

Fri Oct 03, 2008 9:33 pm

Wow this has been an extremely helpful thread. I appreciate all the info!

This past weekend I was at the Salinas Air Show in Cali and there was bad lighting, but it didn't explain the terrible quality of the pics that came out. It turns out I made the same mistake, I was shooting from 400 to 500mm at 5.6 and ISO 100. Lots of bad quality pics, most being soft and grainy.
Example of one below.. where I'm disappointed because it could've a much better pic




So shooting at 8.0 and iso 200 would really help? (assuming i have a steady arm)
 
maiznblu_757
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RE: Decrease In Quality With High Shutter Speeds?

Sat Oct 04, 2008 1:32 am



Quoting NIKV69 (Reply 3):
Shooting fighters close up is not easy.

and how would you know?  cheeky  Sorry, I couldn't resist.  Silly
 
NIKV69
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RE: Decrease In Quality With High Shutter Speeds?

Sat Oct 04, 2008 1:45 am



Quoting Maiznblu_757 (Reply 10):
Sorry, I couldn't resist

Of course not, why would we ever expect mature behavior from you?  crazy 
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