What is 'overhang'?

[shawn_stupidpost]

I'm new here, and Steve R. has noted an 'overhang' problem with the 300mm. I've never heard this term before, and would like to know what it is. I'm hoping to get the 1.4 tc for a 165mm LS, and I am now curious if it will have an 'overhang' problem, and how crucial such a problem might be.

 

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Thanks for the great site.

 

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shawn

[patrick_drennon]

As Steve is using the term 'overhang' I believe it relates to the

weight set out from the tripod mounting point of the camera. When the

combined camera/lens center of gravity extends a significant distance

from the tripod mounting point, this 'overhang' magnifies any

vibration induced from the mirror or shutter. Any camera/lens

combination will suffer from this phenomenon which is why long

telephotos have tripod mounts on them close the camera/lens center of

gravity.

 

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The 165 f/4 LS with the 1.4 tc will have the center of gravity some

distance from the tripod mount (I own the 165 LS and this is true

without the teleconverter). It will not be nearly as severe as the

same rigup with the 300 because the 165 is much shorter and lighter.

[shawn_stupidpost]

Phew. I thought it was something optical. Thanks a lot. shawn

[steve_rasmussen]

I would estimate that you would need a six or seven pound tripod as a

minimum to give you a stable base for the setup (165 + 1.4x)you are

interested in. The converter will give you an f/5.6 as the fastest

aperture. SR

[shawn_stupidpost]

ps Steve 5.6 is not a problem. I try not to shoot at less than

f8-1/2...and at nothing more than f16 (or at least 1 stop over the

min. aperture of my lens...)

[tom_goodrick]

When on the tripod I always shoot with the mirror up to minimize the

vibration problem with my 300. I usually also hang a heavy hand on

the top of a leg. When shooting portrait format it really stresses

the camera attachment which wants to swivel. I switched quik-release

connectors so I have an old-style with a good rubber pad on my bogen

for this. in one of these forums we found a good lens-camera support

that balances the lens much better. I still haven't gotten one. has

anyone tried this?