wcwcheung
Posts: 5
Joined: Mon May 04, 2009 7:32 am

Photos Look Blur, Please Advise To Improve My Skil

Sat Jul 04, 2009 3:23 am

I took some aviation pictures, but I found that most of them are out of focus and not sharp at all. Please comment my pictures and please give me some advises. I am using Nikon D90 & Nikon AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED. With many thanks!

Focal Length: 170mm, Shutter: F/8, Exposure:1/200s, Exposure compen.:0, ISO:100
http://i623.photobucket.com/albums/tt312/wcwcheung/7-1%20HKIA/DSC_0167.jpg


Focal Length: 210mm, Shutter: F/8, Exposure:1/250s, Exposure compen.:0, ISO:100
http://i623.photobucket.com/albums/tt312/wcwcheung/7-1%20HKIA/DSC_0273.jpg


Focal Length: 195mm, Shutter: F/8, Exposure:1/400s, Exposure compen.:-0.7, ISO:100
http://i623.photobucket.com/albums/tt312/wcwcheung/7-1%20HKIA/DSC_0287.jpg

http://i623.photobucket.com/albums/tt312/wcwcheung/7-1%20HKIA/DSC_0190.jpg
 
RonS
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Joined: Tue Feb 03, 2009 6:22 pm

RE: Photos Look Blur, Please Advise To Improve My Skil

Sat Jul 04, 2009 4:00 am

I already offered my advice in your other post. Did you delete it?
All opinions expressed by me are my own opinions & do not represent the opinions in any way of my employers.
 
wcwcheung
Posts: 5
Joined: Mon May 04, 2009 7:32 am

RE: Photos Look Blur, Please Advise To Improve My Skil

Sat Jul 04, 2009 4:29 am

My post was deleted by a.net, but I have already read your post. Thanks for your advise.
Yes, the time when I took pictures was midday and therefore the sun was at the top of my head. I think I should take the pictures in the same place while it is in afternoon.

I was using F/8 because I thought the smaller aperture will generate Depth of field. Let me try your suggestion next time to using shorter shutter speed as well.
 
ruudb
Posts: 144
Joined: Sun Jun 05, 2005 4:21 am

RE: Photos Look Blur, Please Advise To Improve My Skil

Sat Jul 04, 2009 7:46 am

ISO 100? Is it possible on a D90? Or is it simulated ISO? What I have been reading the simulated ISO 100 isn't to good, it would be better to use the 200 ISO it will bring more noise of course. But it is possible to reduce that, and it will bring as positive side that the shutterspeed used can be faster. Keep in mind the 70-300mm lens is a good lens but don't expect great pictures above 220mm. I can't say anything about your pictures, because I am on a not to great monitor now, but from here it looks like there is quite a lot of noise. And flat. About the sun it seems it is too much on the nose, so you have to be at this spot whenever the sun is more coming from behind you.

Ruud
 
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ghajdufi
Crew
Posts: 461
Joined: Tue Jun 14, 2005 5:18 am

RE: Photos Look Blur, Please Advise To Improve My Skil

Sat Jul 04, 2009 10:25 am

I usually try to avoid any shutterspeed below 1/800. Push up the ISO and-or increase the apperture to f5.6. From a distance like this DoF isn't going to be a problem. Play around with a DoF calculator on the net to see what DoF you are getting with your camera settings.
Regards,
Gabor
Your photos are like your children, you will always find them perfect.
 
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cpd
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RE: Photos Look Blur, Please Advise To Improve My Skil

Sat Jul 04, 2009 12:06 pm



Quoting Ruudb (Reply 3):
I can't say anything about your pictures, because I am on a not to great monitor now, but from here it looks like there is quite a lot of noise

There is also a lot of JPEG compression - so the quality looks poor because of that.

The D80 could do ISO100 as well and gave good results.

I wonder how much cropping was done to these images? Apart from that, the light is not ideal - which amplifies quality issues. Isn't the D90's low-light performance said to be quite good? If so, use more ISO. ISO200 should be safe enough.

I remember a pro-photographer using the D90 and he was getting great results with it (so good that it was the backup camera to his usual high-end Nikon DSLR bodies).

With a VR lens, shutter speeds below 1/800sec should be quite safe. The 70-300 isn't a huge lens, and it has VR. On my 200-400mm with a 1.4x TC, I can use 1/320sec at 550mm taking advantage of the VR feature. It works well.

Apart from that, I can only suggest to take photos in better light conditions with the sun at your back, rather than in front of you. Use Aperture priority mode at F/8 and pay attention to the histogram display. Use exposure compensation to adjust as required. There is also a display that should show you blown out highlights (it will blink those areas black). If you see that blinking, decrease exposure maybe -0.3EV, even -0.7EV if needed.
 
soon7x7
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RE: Photos Look Blur, Please Advise To Improve My Skil

Sat Jul 04, 2009 12:13 pm



Quoting Cpd (Reply 5):

Why not use shutter priority?...I'm curious...I'll use iso 100-200, w/ vr, 70-200mm, 200-400mm, yet some soft shots. Will aperture p help this?...j
 
wcwcheung
Posts: 5
Joined: Mon May 04, 2009 7:32 am

RE: Photos Look Blur, Please Advise To Improve My Skil

Sat Jul 04, 2009 12:15 pm

Thanks for all of your advises and comments. Actually, those pictures haven't cropped, but they were originally shot by the camera. I will try to set the ISO in 200 and see the outcome.
 
wcwcheung
Posts: 5
Joined: Mon May 04, 2009 7:32 am

RE: Photos Look Blur, Please Advise To Improve My Skil

Sun Jul 05, 2009 3:16 am

I was using aperture priority because i want to fix the aperture in F/8. By using shutter priority is better?
 
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cpd
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RE: Photos Look Blur, Please Advise To Improve My Skil

Sun Jul 05, 2009 4:05 am



Quoting Wcwcheung (Reply 8):
By using shutter priority is better?

Well I don't think either is better than the other. It's up to user preference, and what you are doing. I have few problems using aperture priority, but that's me and my preferences. Maybe you have a need to use a certain shutter speed - then you might use shutter priority.

While we can provide tips, it is ultimately up to you to find your way of doing things, what works for you. That takes time and some trial and error. Eventually, you will master the art of operating your camera, and the relationship between shutter speed, aperture and ISO sensitivity.
 
wcwcheung
Posts: 5
Joined: Mon May 04, 2009 7:32 am

RE: Photos Look Blur, Please Advise To Improve My Skil

Wed Jul 08, 2009 6:25 am

I used the setting as JPEG Fine and the some website said that JPEG Fine has the JPEG Compression Ratio 1:4. Shall I need to use NEF format as Raw to keep the pictures' quality?

One more question is that, if I shoot by NEF format and convert it to JPEG, will the quality degrade which is worse than taking pictures in JPEG FINE mode?

Thanks!

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