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FORUMS Photo Sharing & Visual Enjoyment Still Life, B/W & Experimental 
Thread started 31 Oct 2010 (Sunday) 00:46
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take a picture of the bottom of camera your taking the picture with??

 
sabianq
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Oct 31, 2010 00:46 |  #1

i had 3 mirrors set up..
uggg. what a pain in the butt...
then the multiple reflections due to the properties of the second surface glass mirror..


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Brian Larson
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sabianq
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Oct 31, 2010 01:30 |  #2

so my wife went to ikea and got a hangy thing..
i eas looking for something to bolt the 70-200 lens to the camera body for extra security with the speed strap..
i came up with this using an unused piece from the ikea hangy thing..
it seems to work great..
it is easily machined ans i can add other tripod kwik connect heads to the steel beam..

the piece holding the steel to the lens is my rapid strap connector.. i moved it back closer to the hook. now the camera can hang off of my belt and be attached to my speed strap.. and the connection is real solid because the lens and the body share the hole cameras weight.
stress on the lens mount is eliminated with this set up..


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Randy1213
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Oct 31, 2010 13:50 as a reply to  @ sabianq's post |  #3

Curious about something: Have you really had a concern that you need the extra support for that lens? I've used the 70-200 f/2.8 and, even with a 2X teleconverter, I haven't been concerned that I'm putting too much stress on the lens mount. Are you noticing some problem developing with your lens mount that makes this necessary?

By the way, clever use of thingies wives bring home.


No-Excuses Kit: 1Ds Mk III, 1D Mk IV, 60D (IR Only). Lenses (all Canon): 16-35m f/2.8 L, 24-70mm f/2.8 L, 24-105mm f/4.0 L IS, 70-200mm f/2.8 L IS, 100-400mm f/4.5-5.6 L IS, 85 mm f/1.2 L MkII, 100mm f/2.8 macro, MP-E 65mm f/2.8 macro, 15mm f/2.8 fisheye. Support : Gitzo 3541L + RRS BH-55 LR Ballhead.

  
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sabianq
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Nov 01, 2010 07:30 |  #4

Randy1213 wrote in post #11198862 (external link)
Curious about something: Have you really had a concern that you need the extra support for that lens? I've used the 70-200 f/2.8 and, even with a 2X teleconverter, I haven't been concerned that I'm putting too much stress on the lens mount. Are you noticing some problem developing with your lens mount that makes this necessary?

By the way, clever use of thingies wives bring home.

hi Randy..

Thanks, I guess I have a passion for "re-purposing" things :)

the reason i was wanting a better support was because i felt like there was a lot of stress on the bayonet mount (camera side) when i am using the 70-200 2.8..
the lens is a heavy lens which weighs a lot more than the camera..
i know the old saying that you should carry the instrument by the lens if the lens weighs more than the body and to cary the body is the lens is lighter..

it all started when i bought my 70-200 used from CL
the lens was in good shape but the bayonet mount was trashed.. there was a lot of wear at the locking pin and allowd for some rotational play.
after talking to the techs at canon, they said that a little tiny bit of play was OK, but the amount i had was a bit more than a little tiny bit..

apparently, the heavy lens can put a lot of stress on the camera body mount, and that stress can deform the locking pin on the body making all attached lenses have some play..
while this is not generally a problem, but if i want to use the lens on the camera for an extended amount of time, i wanted the lens to be more securly attached to the camera.

long story short, I ordered the new bayonet mount for the lens from canon for 28 bucks or so..
repaired the lens.. (documented the repair)
https://photography-on-the.net …=940407&highlig​ht=bayonet
used the newly repaired lens for a couple of sessions..
found that i pick the camera up by the grip even with the heavy lens because of pure habit.
decided that it would be nice to have the lens and the body attached with a rigid structure.
the stainless steel hangy strap from IKEA is a soft stanless steel and can be machined and drilled quite easily..
so i punched holes in the steel to attach the lens bayonet mount to the camera body..
i used a rigid holo steel tube as a spacer for the body and the steel support.

i like it a lot, the camera and lens are far more rigid and with the bottom of the steel so long, i punched more holes in the steel (not pictured) and attached my various tripod quick mounts..
the rapid strap connector was moved to the back of the steel near the hooky thing.
it is perfect for letting the camera hang off of my belt and still be attached to the speed strap..
besides the lenth of steel makes a great camera grop..
sow when i move the camera around, the stress on the camera lens joint is relieved and transfered to the lens and body tripod mount.

the camera just feels substantially more solid..
i want to bend the steel in such a way that i dont have to use a spacer between the body and steel..

i think that it is interesting that the bottom of the lens tripod mount and the bottom of the camera are not on the same plane..
does anyone know if the lens mount on the 70-200 2.8 is the same heigth as the tripod mount on a 1D or a body with a grip?


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Brian Larson
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Radders
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Nov 01, 2010 07:31 |  #5

Is that an Ikea sticker on the support??


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sabianq
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Nov 01, 2010 09:17 |  #6

Radders wrote in post #11203202 (external link)
Is that an Ikea sticker on the support??


lol
yea!
i removed it when i drilled more mounting holes..

lol


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Brian Larson
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sabianq
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Nov 01, 2010 09:22 |  #7

its the "GRUNDTAL" ikea line for kitchen organization..

the metal is soft and very workable and is some form of stainless steel.

it works beautifully..


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take a picture of the bottom of camera your taking the picture with??
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