ac888yow
Posts: 394
Joined: Thu Jan 20, 2005 12:29 pm

Questions About My 100-400 L Is

Fri Dec 15, 2006 12:25 am

Hello:

I was recently out shooting at a different area of my home airport, one that required shooting through a fence.

Basically, I was pressing the lens (hood) up against an opening in the fence and shooting away, with the IS on. My questions are:

1) I know that, for example, when using a tripod the IS must be turned off otherwise I risk damage to the lens. Is pressing the camera up against the fence similar to using a tripod in the sense that I risk damage to the lens? Should I turn the IS off when shooting through a fence?

2) While shooting through the fence, I noticed that pretty much all of my shots, taken at the long end of the zoom, exhibit sort of an out of focus or blurry characteristic. I wonder, could this have been caused by #1 above? Perhaps leaning the lens up against the fence threw the IS "out of whack" resulting in these poor images?

Thanks for any help,

- Peter -
 
INNflight
Posts: 3526
Joined: Tue Apr 13, 2004 5:11 am

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 12:28 am

I don't have knowledge on whether the IS causes your blurriness (sounds unlikely though), but I have shot through fences with the 100-400 on a tripod ( IS on ) and still got decent results, so go figure  Smile

Cheers,
Florian
Jet Visuals
 
IL76
Posts: 2237
Joined: Mon Jan 05, 2004 5:43 am

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 12:43 am

I always remove the lenshood to get as close to the mesh as possible... No problems there (with IS on). At 400mm the mesh is basically invisible, at 100mm a very small mesh could give dark corners.

E
 
User avatar
Kukkudrill
Posts: 1043
Joined: Thu Dec 30, 2004 10:11 pm

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 1:08 am

Quoting AC888YOW (Thread starter):
when using a tripod the IS must be turned off otherwise I risk damage to the lens.

I was under the impression that you have to turn the IS off not because it might damage the lens but because vibrations from the IS mechanism itself could set up a feedback loop, causing the picture to move erratically. I doubt whether the same thing could happen when the camera is handheld, even though you might be partially resting it on a fence.

Charles
Make the most of the available light ... a lesson of photography that applies to life
 
ua935
Posts: 547
Joined: Mon Feb 23, 2004 5:41 am

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 2:09 am

The out of focus or blurry charateristic is the fence. If you do not shoot exactly through the middlle the fence will be in the shot. Because you are shooting throuhg the fence they will only be very feint but they are there.
Live every second like you mean it
 
ac888yow
Posts: 394
Joined: Thu Jan 20, 2005 12:29 pm

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 2:30 am

Thanks for the responses.

So from what I'm reading leaning the lens up against the fence shouldn't cause erratic behaviour with the IS, and the poor image quality is probably unrelated.

I normally get pin sharp images with the lens all the way through to 400mm, so obviously this was a user problem (I was shaky, etc.) and/or the fence was in the way.

I should probably just get a ladder and get on with it ...
 
aero145
Posts: 2867
Joined: Tue Jan 04, 2005 4:59 am

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 2:57 am

Quoting AC888YOW (Reply 5):
I should probably just get a ladder and get on with it ...

I did that and never looked back, ladder is a must of an av-photog IMO, it can come in handy more often than looking over fence, also just for standing higher up... at least that's how it is here.

d
 
cosec59
Posts: 2618
Joined: Thu Jun 23, 2005 2:59 am

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 3:20 am

Quoting Aero145 (Reply 6):
Quoting AC888YOW (Reply 5):
I should probably just get a ladder and get on with it ...

I did that and never looked back,

Try that at LHR  Wink
Rules are for the obedience of fools but for the guidance of wise men
 
User avatar
jorge1812
Posts: 2911
Joined: Mon Apr 19, 2004 9:11 pm

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 4:17 am

Quoting Aero145 (Reply 6):
ladder is a must of an av-photog IMO,

Sure a must but keep in mind that it's not always handy when transporting without a car.

Georg
 
aero145
Posts: 2867
Joined: Tue Jan 04, 2005 4:59 am

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 5:27 am

Quoting Jorge1812 (Reply 8):
Sure a must but keep in mind that it's not always handy when transporting without a car.

Well, for spotting I sometimes cycle more than one kilometer and I hold the ladder in my right hand. So, maybe it's not at all that bad if you're not driving......

Quoting Cosec59 (Reply 7):
Try that at LHR

 rotfl 
 
lasham
Crew
Posts: 214
Joined: Sun Jan 30, 2005 5:43 am

RE: Questions About My 100-400 L Is

Fri Dec 15, 2006 6:13 am

Quoting Cosec59 (Reply 7):
Try that at LHR

Can be done. Just got to use it for a short time when the coast is clear!

Tony
No sun no fun

Who is online

Users browsing this forum: LeeYangzao and 5 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos