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Archive 2011 · Size of mounting hole on bottom of Canon DSLRs?

  
 
TravelingGnome
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p.1 #1 · Size of mounting hole on bottom of Canon DSLRs?


Hey guys, I just got a used Gitzo monopod from a local thrift store, but the mounting screw on the mono-pod is to large to allow me to attached either a camera or a tripod head, so I'm thinking I need some sort of reducer. Something like this: http://www.amazon.com/Manfrotto-088-4-20-Inch-Female-Adapter/dp/B001M4HTFM/ref=pd_bxgy_p_text_b

So, my actual question is this: what size if the mounting hole in the bottom of Canon's DSLRs? If it is 3/8", will the above piece fix my problems?



Aug 18, 2011 at 04:02 PM
EB-1
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p.1 #2 · Size of mounting hole on bottom of Canon DSLRs?


No, it is 1/4" as virtually all 35mm-style SLRs are.

EBH



Aug 18, 2011 at 04:05 PM
EB-1
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p.1 #3 · Size of mounting hole on bottom of Canon DSLRs?


Are you sure the stud on the monopod is not reversible? Most of them have both 1/4" and 3/8" threads.

EBH



Aug 18, 2011 at 04:07 PM
jcolwell
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p.1 #4 · Size of mounting hole on bottom of Canon DSLRs?


EB-1 wrote:
Are you sure the stud on the monopod is not reversible? Most of them have both 1/4" and 3/8" threads.

EBH


+1



Aug 18, 2011 at 04:44 PM
runamuck
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p.1 #5 · Size of mounting hole on bottom of Canon DSLRs?


If you look, the stud is screwed into a nut. Loosen it a bit and unscrew everything. The internal end of the screw will be 1\4 inch to suit your camera. The nut serves as a lock to keep everything from unscrewing.


Aug 18, 2011 at 04:48 PM
TravelingGnome
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p.1 #6 · Size of mounting hole on bottom of Canon DSLRs?


Thanks for the responses guys, but maybe it would be more helpful if I posted pictures of the actual monopod and screw to which I'm referring.

Below are three photos, the first showing the monopod itself, the second showing the screw from the top, and the third showing the screw from the side, so that you can see how little of it protrudes from the top of the monopod.

http://img822.imageshack.us/img822/7641/monopod1.jpg
http://img263.imageshack.us/img263/9342/monopod2.jpg
http://img225.imageshack.us/img225/5962/monopod3.jpg



Aug 18, 2011 at 06:48 PM
sjms
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p.1 #7 · Size of mounting hole on bottom of Canon DSLRs?


1/4-20 plain and simple


Aug 18, 2011 at 06:48 PM
TravelingGnome
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p.1 #8 · Size of mounting hole on bottom of Canon DSLRs?


The screw in the second photo is far to large to fit into the female screw hole on either a ball-head or base of a digital SLR (I've got a 40D and 5D2 and both have to small of holes for the screw in the top of the monopod).


Aug 18, 2011 at 06:50 PM
DopamineHunter
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p.1 #9 · Size of mounting hole on bottom of Canon DSLRs?


you be missing the plate on top....


Aug 18, 2011 at 06:54 PM
sjms
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p.1 #10 · Size of mounting hole on bottom of Canon DSLRs?


the image looks to be a 3/8-16 thread


Aug 18, 2011 at 06:57 PM
TravelingGnome
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p.1 #11 · Size of mounting hole on bottom of Canon DSLRs?


sjms wrote:
1/4-20 plain and simple


Okay, so if the hole in the bottom of the camera is a 1/4-20, what do I need to get the monopod the attach to it? I suppose I'll need some sort of xx" to 1/4" reducer as the screw in the top of the monopod is much larger then the camera's hole... any ideas?



Aug 18, 2011 at 06:57 PM
TravelingGnome
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p.1 #12 · Size of mounting hole on bottom of Canon DSLRs?


Sunny Sra wrote:
you be missing the plate on top....


Yeah, I was thinking I'm missing something. Do you know what I need to make this thing work Sunny?



Aug 18, 2011 at 06:57 PM
DopamineHunter
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p.1 #13 · Size of mounting hole on bottom of Canon DSLRs?


http://www.amazon.com/Manfrotto-120-Converter-Converts-Tripod/dp/B001M4HTHA

i think those would help..



Aug 18, 2011 at 07:12 PM
DopamineHunter
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p.1 #14 · Size of mounting hole on bottom of Canon DSLRs?


http://www.amazon.com/Manfrotto-015-4-Inch-20-8-Inch-Adapter/dp/B001BPCMRW/ref=pd_sim_p_2


Aug 18, 2011 at 07:15 PM
bitmaker
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p.1 #15 · Size of mounting hole on bottom of Canon DSLRs?


Sunny's right... you're missing something. I doubt, though, that his linked Manfrotto part will fit your Gitzo (not that he intended his link for anything more than reference).

See this drawing for the Gitzo 3340L Monopod. Mouse over the upper left corner, and look at P/N D0701.05 (a part Gitzo calls the "Disc"). The Disc for your model will thread into the screw in your pics. You'll might also need a 1/4-20 adapter (P/N D0701.05 for the 3340L) so that you can then mount a camera or quick release. Or, that 1/4-20 thread may be part of the Disc for your model monopod.

Greg

Edit: rklee's pics show the Disc and threaded adapter perfectly!



Aug 18, 2011 at 08:54 PM
vivisha
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p.1 #16 · Size of mounting hole on bottom of Canon DSLRs?


Just wanted to clarify: 1/4 20 is the standard measure closest to the actual metric size they use on DSLRs. If you don't believe it, go to a Home Depot get a 1/4 20 and screw it on your camera and you will see there is some play as compared to the fit to an actual 1/4 20 nut.


Aug 30, 2011 at 07:23 PM
omarlyn
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p.1 #17 · Size of mounting hole on bottom of Canon DSLRs?


vivisha wrote:
Just wanted to clarify: 1/4 20 is the standard measure closest to the actual metric size they use on DSLRs. If you don't believe it, go to a Home Depot get a 1/4 20 and screw it on your camera and you will see there is some play as compared to the fit to an actual 1/4 20 nut.


Ummm, so what's the actual 'real' thread size then? On a side note: Ive always heard that the battery covers for the small button cells dating back from 'classic' cameras to today that seem to fit an American quarter so well is actually designed for a Japanese 10 yen coin…at least that's what I've always heard.

Omar



Aug 30, 2011 at 10:38 PM
EB-1
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p.1 #18 · Size of mounting hole on bottom of Canon DSLRs?


It could be. When I put a quarter next to a 10 yen coin the quarter is slightly larger, but the 10 yen has a smooth edge.

EBH



Aug 30, 2011 at 11:29 PM
aborr
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p.1 #19 · Size of mounting hole on bottom of Canon DSLRs?


EB-1 wrote:
It could be. When I put a quarter next to a 10 yen coin the quarter is slightly larger, but the 10 yen has a smooth edge.

EBH

I think it's the 100 yen coin you guys mean. The one in my desk drawer used to live in my camera bag in the days when the bag contained manual focus 35mm bodies instead of DSLR's. The coin's as old as my MF 35mm bodies - It's a bit smaller in both diameter and thickness than an American quarter. I don't know if Japanese coinage has changed in design since I acquired my coins.

vivisha -

The other posters are right. The tripod socket on Canon cameras is a 1/4-20 UNC (Unified Inch screw thread, Course pitch.), same as the male thread on the small side of the Gitzo "disc". If the bolts you get from your hardware store don't fit it properly, you need a new hardware store. The closest metric standard size is an M6x1.0, which has too fine a thread to fit in the camera's socket. A 1/4" UNC bolt is real crude compared to any modern standard metric fastener that's close in size.



Aug 31, 2011 at 05:58 AM
Charles Gallo
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p.1 #20 · Size of mounting hole on bottom of Canon DSLRs?


vivisha wrote:
Just wanted to clarify: 1/4 20 is the standard measure closest to the actual metric size they use on DSLRs. If you don't believe it, go to a Home Depot get a 1/4 20 and screw it on your camera and you will see there is some play as compared to the fit to an actual 1/4 20 nut.


edit:

It's either class of fit, OR cameras were actually made to 1/4 BSW (witworth) threads - don't know if they still are

2nd edit

It's definately 1/4-20 - I decided to drop the $$ on the ISO standard for tripod connections (what the heck) - The standard is ISO 1222:2010

Without violating the license agreement - the bolt is 4.5 mm long

and the basic thread form is 1/4-20 UNC class 1A



Sep 01, 2011 at 12:49 PM
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