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draigonair
Topic Author
Posts: 624
Joined: Tue Oct 10, 2000 8:37 pm

EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 5:04 am

Hey guys,

Ok i don't know if its me but i think my EF100-400mm has some problems as it doesnt seem to give 100%sharp images anymore.. I was at airport today and i was shooting 100ISO and at 640/s shots at 400mm zoom and the photos just dont seem crisp clear...i am using a mono-pod for stability and IS is off...Anyone else experiencing this? This was at runway with planes taking off..Now is 640/s too slow??

One thing which might make me think the shutter speed being to slow is that when i went to take photos of planes taxing (close by) then the photos do seem sharp...so here is my question, is 640/s too slow? (it was around 16pm in Holland and the light was good..mode was AV at 5.6)
Any help would be appreciated. [using 300D]

Also, the 20D is this camera better than the 300D in keeping the plane in focus?

Cheers
Nick
cheers
 
IL76
Posts: 2238
Joined: Mon Jan 05, 2004 5:43 am

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 5:12 am

Quoting Draigonair (Thread starter):
Now is 640/s too slow??

Not really... I think it's very fast. The following shot was taken with 1/160s (f7.1 400mm):

View Large View Medium
Click here for bigger photo!

Photo © Eduard Brantjes


I rarely go over 1/500s. Especially with IS there is no need for it (for me)...

E
 
timdegroot
Posts: 3258
Joined: Wed Apr 24, 2002 10:37 pm

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 5:13 am

Quoting Draigonair (Thread starter):
mode was AV at 5.6)

The 100-400 is sharper at around f8.0 but it should definitely not be soft. 1/640 is fast enough too.

But why use a monopod and turn IS off, kinda defeats the purpose doesn't it.

Tim
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walter2222
Posts: 1244
Joined: Fri Sep 23, 2005 3:40 am

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 5:30 am

Hi Nick,

I guess the problem lies with the 300D.

Quoting Draigonair (Thread starter):
Any help would be appreciated. [using 300D]

Focusing is rather slow (unless you can keep the object in a panning shot and hence in focus) with the 100-400mm (f/5.6 at 400mm), but for tracking a fast moving target (flying towards or away from you), you constantly have to re-focus with the 300D...  Sad

I have had similar problems and that's why I would like to upgrade ASAP to a 20D or 30D...

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 - ...
 
draigonair
Topic Author
Posts: 624
Joined: Tue Oct 10, 2000 8:37 pm

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 5:35 am

Thanks guys,

wel i was using mono-pod just to see if that would help create better sharper shots because recently when ever i go to runway im not getting alot of very sharp photos. Okay they are ok but not perfectly sharp...hence not creating very nice imagies when edited and usually rejected because i would have to sharpen it too much...So it can be said its not my lens...since when i shoot still objects, like taxing 747, it is sharp...SO its the 300D which drags it down? Is that the problem? Can anyone else confirm this?
Becuase then i will upgrade to 20D (have been looking to do so)

let me know what you guys think.

cheers'

Nick
cheers
 
timdegroot
Posts: 3258
Joined: Wed Apr 24, 2002 10:37 pm

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 5:37 am

Quoting Draigonair (Reply 4):
SO its the 300D which drags it down? Is that the problem?

I very much doubt this. Not familiar with the 300D but even with the slow D60 you can get perfect results every time.

Tim
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vasanthd
Posts: 446
Joined: Tue May 17, 2005 8:35 am

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 5:40 am

Quoting Draigonair (Thread starter):
This was at runway with planes taking off

Maybe you have the wrong AF mode...causing pictures to be off-focus making it soft.

Which AF Mode do you use?
One-shot
AI Servo
AI Focus

I usually use the AI Servo which focus continuously when the plane moves continuously.

One-shot mode is more suitable when the distance between the lens and the object is stationary.

--Vas
One Lucky shot deserves another!
 
sulman
Posts: 1966
Joined: Wed Mar 03, 2004 5:09 am

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 5:44 am

Quoting VasanthD (Reply 6):
Which AF Mode do you use?

You're pretty much stuck with AI focus on the 300D. There is some AI Servo functionality in burst mode but it's still pretty poor.

Sounds like something else is wrong in Nick's case.
It takes a big man to admit they are wrong, and I am not a big man.
 
draigonair
Topic Author
Posts: 624
Joined: Tue Oct 10, 2000 8:37 pm

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 5:50 am

how can i select the AI Servo setting? isnt that only available in sports mode?

Nick
cheers
 
draigonair
Topic Author
Posts: 624
Joined: Tue Oct 10, 2000 8:37 pm

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 6:38 am

sorry didnt see sulmans post...yeh thought so that you couldnt use that...wel weird thing is that when plane is close its sharp...so there cant really be alot wrong...its just when plane is moving fast it doenst seem to be sharp...any suggestions?
cheers
 
9VSPO
Posts: 4187
Joined: Sun May 18, 2008 9:03 pm

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 6:50 am

Al Servo AF for moving subjects.

This AF mode is for moving subjects when the focusing distance keeps changing. I have it on the 350D, not sure about the 300D.  

Useful for shots like this!





[Edited 2006-03-13 22:54:28]
 
draigonair
Topic Author
Posts: 624
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RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 7:03 am

Nice photos,

in other words; on 20D (and 350D also in this case) the focusing is way better than the 300D? So for shooting high speeds items it would be recommended to purchase the 20D and this will give better sharper images? (also ISO is less grain so i can bump up the ISO and still have low grain photos)

cheers
cheers
 
vasanthd
Posts: 446
Joined: Tue May 17, 2005 8:35 am

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 7:28 am

Quoting Sulman (Reply 7):
You're pretty much stuck with AI focus on the 300D.

I'm sorry. I didnt know 300D had this focus restriction. I have a 20D and I can choose whichever mode I need whenever I want.

Quoting Draigonair (Reply 9):
.its just when plane is moving fast it doenst seem to be sharp...any suggestions?

How many focus points do you use?

--Vas
One Lucky shot deserves another!
 
vasanthd
Posts: 446
Joined: Tue May 17, 2005 8:35 am

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 7:34 am

Quoting Draigonair (Reply 11):
so i can bump up the ISO and still have low grain photos

YUP!! Here is one of my shots taken at ISO 1600. With a little bit of NeatImage this image is virtually grainless.

View Large View Medium
Click here for bigger photo!

Photo © Vasanth Dharmarajan



Quoting Draigonair (Reply 11):
on 20D (and 350D also in this case) the focusing is way better than the 300D?


Now I realise...YES! But before you go for a new body, try your 100-400 lens on a different body and narrow down ur issues to ur 300D body. Then buy your new cam/lens.

--Vas
One Lucky shot deserves another!
 
draigonair
Topic Author
Posts: 624
Joined: Tue Oct 10, 2000 8:37 pm

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 7:35 am

Well the 300D has 7 focus points and i use all of them...i can try just using the center one and see if this fixes the problem..but i dont think that would change anything because when the plane has lifted off the runway the only thing i see in my viewfinder is the plane so atleast something should be sharp...but its not..its always just a bit blur to make it not a good photo.

Well i know the lens is working good because on stationary objects or taxiing planes she is very sharp so the lens should not be the problem i think.. so conclusion to this thread...the camera is the one making it not sharp? Because if its the lens then on stationary objects she should also be soft..and thats not the case.

[Edited 2006-03-13 23:41:32]
cheers
 
flyfisher1976
Posts: 777
Joined: Tue Jan 04, 2005 1:08 pm

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 8:34 am

Quoting Draigonair (Reply 14):
Well the 300D has 7 focus points and i use all of them

I was doing this too when i first got my 300D and discovered that this was the cause of many blurry images. You should always use the center focus point. Selecting all focus points lets the camera select a particular point at random, and does not imply that all 7 are being used.

See this thread for more info...

https://www.airliners.net/discussions...ation_photography/read.main/167665

Icidentally and ironically, dragonair, you replied to this very thread...

[Edited 2006-03-14 00:37:37]
 
User avatar
JeffM
Posts: 7569
Joined: Sat May 07, 2005 3:32 am

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 12:07 pm

Quoting Draigonair (Reply 14):
so conclusion to this thread...the camera is the one making it not sharp?

No, you said it was fine on taxiing a/c and on stationary objects.
 
catball
Posts: 24
Joined: Tue Aug 07, 2001 6:01 am

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 2:30 pm

Most zoom lenses are not at their optimum wide open. (i.e. - 400 mm at f5.6, the widest setting at this zoom level.) The depth of field here is at the minimum. Using all the focus points, you don't know where the camera is focusing. May well be somewhere other than the aircraft. Something is probably sharp, just not what you are looking for.

While I am no expert, I would agree with the other posters in recommending that you use an aperture setting of F8 and let the shutter speed fall where it may. I would also leave IS on. You paid for it, might as well take advantage of it!

Best of luck.....isn't learning fun !! :')

Scott
 
draigonair
Topic Author
Posts: 624
Joined: Tue Oct 10, 2000 8:37 pm

RE: EF100-400mm Problem (sharpness)

Tue Mar 14, 2006 8:50 pm

OK thanks guys im getting a better and clearer picture here!

So from what i have learned (heheh) i will put the focusing on the center focus point and use AVmode (which i was) but then minimal F8 and off course the lowest ISO setting...I will go to airport tomorrow after work as i work at the airport anyways hahha i will let you guys know what the result is! Thanks for the quick replies and lots of help! great forum as always  Smile

cheers guys!

Nick
cheers

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