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Vibe-Rater

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Reply with quote  #1 
Hi all,

The CSI Speedvue has 2 threads, one on either side. Can anyone inform me as to what those threads are?  the smaller one appears to be a standard camera thread, the other I don't know.  I'm trying to put my Speedvue on a photographers with minimal screw thread adapters. rgds.
HuskerTim

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Reply with quote  #2 
They are:

Larger = 3/8" - 24 UNF
Smaller = 1/4" - 28 UNF
Vibe-Rater

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Reply with quote  #3 
Thanks so much HuskerTim!
Sinski

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Reply with quote  #4 
The 1/4" - 28 UNF is the same size as a standard accelerometer screw. You would then be able to screw and accelerometer magnet into the side and mount it somewhere if you wanted to use as a tacho which has been mentioned on here before.
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Reply with quote  #5 
Thanks Sinski, that is super helpful.  Have just tried it and fits perfectly.  I'll have a look for a large CTC super strong magnet.  Wouldn' want the Speedvue to fall into a machine. rgds 
John from PA

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Reply with quote  #6 
Quote:
Originally Posted by Vibe-Rater
Hi all,

The CSI Speedvue has 2 threads, one on either side. Can anyone inform me as to what those threads are?  the smaller one appears to be a standard camera thread, the other I don't know.  I'm trying to put my Speedvue on a photographers with minimal screw thread adapters. rgds.


The tripod screw thread standard for attaching the camera calls for a 1/4-20 UNC or 3/8-16 UNC thread. Most consumer cameras are fitted with 1/4-20 UNC threads and the larger cameras like a Hassleblad the 3/8.

Using the 1/4-28 in place of 1/4-20 is a mismatch that may appear to work but may not yield sufficient thread engagement.

Would you believe ISO defines the tripod thread? They also define the "standard" wine tasting glass. How do I get on that committee?
RustyCas

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Reply with quote  #7 
I can confirm the smaller is 1/4-28 as stated. Not sure about the larger. I use a 1" flat rare-earth magnet on mine and it works well, stuck on the back of the meter or to a machine. I think that magnet will hold better than all but the largest 2-rail magnets (which I would hate to lug around on routes).
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Vibe-Rater

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Reply with quote  #8 
Hi John,

Yrs, you're right. the camera thread is a mismatch.  And you are also right on the too few thread engagements.  I was fooled by the fact that the stud on the tripod is very short and thought it was fully in.  Back to magnet.  I'll figure something out to attach it to a tripod.  For the aplication I have in mind I don't want to be holding by hand.  Maybe the Speedvue 3/8" - 24 UNF fits onto the 404B tach ball swivel base. That wouuld give better angular adjustment when mounting on an existing flat surface.  I'll try that when I get back to my office. rgds.
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Reply with quote  #9 
Hi Rusty, yes the large magnets are quite heavy. I'm thinking better that than replacing the Speedvue after falling - here in Aus they are nearly AUD$4K. rgds
trapper

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Reply with quote  #10 
Quote:
Originally Posted by John from PA
Would you believe ISO defines the tripod thread? They also define the "standard" wine tasting glass. How do I get on that committee?


John, if you find out please post. I already do a lot of QA testing on those design standards. [biggrin]
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