A1 mounted on Merlin. Vibrations while walking at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > Support Your Local Camera > Stabilizers (Steadicam etc.)


Reply
 
Thread Tools Search this Thread
Old July 10th, 2009, 01:50 PM   #1
Regular Crew
 
Join Date: Nov 2008
Location: Scarborough Me
Posts: 186
A1 mounted on Merlin. Vibrations while walking

Anyone else having problems with an A1 on the Merlin and experiencing jittery footage due to vibrations while walking?
No matter what I've tried, there seems to be a slight movement of the cam, on the Merlin, to cause jittery footage while walking.

Any advice would be greatly appreciated.

My setup is a stock A1, BP-945 Battery. The Screw is touching between the focus and zoom ring.

Thanks
Josh Swan is offline   Reply With Quote
Old July 14th, 2009, 12:30 PM   #2
Regular Crew
 
Join Date: Nov 2008
Location: Scarborough Me
Posts: 186
Guess I just have a bad Merlin?
Josh Swan is offline   Reply With Quote
Old July 14th, 2009, 12:49 PM   #3
New Boot
 
Join Date: Dec 2006
Location: Dallas
Posts: 8
OIS disabled?
Steve Winters is offline   Reply With Quote
Old July 14th, 2009, 05:58 PM   #4
Trustee
 
Join Date: Dec 2006
Location: Central Coast - NSW, Australia
Posts: 1,420
are you saying the the shock from your footsteps is showing up in the footage?

If so It may be the way you're walking. I'm around the 100k and have a large stride which translates into very heavy footsteps and jittery footage (Godzilla's POV) - I'm still working at it, smaller footsteps, the groucho Marx walk - I think (I hope) it;s just a matter of practice, practice, practice.
__________________
Cheers - Paul M.
www.relivetheday.com.au : www.perbenyik.com
Paul Mailath is offline   Reply With Quote
Old July 14th, 2009, 06:11 PM   #5
Major Player
 
Join Date: Oct 2007
Location: London, UK
Posts: 792
Steve Winter's suggestions sounds like the best guess to me.
__________________
http://www.gooderick.com
Richard Gooderick is offline   Reply With Quote
Old July 16th, 2009, 01:40 PM   #6
Regular Crew
 
Join Date: Nov 2008
Location: Scarborough Me
Posts: 186
yes OIS is disbled.
I'll try different walking techniques, but I've seen footage with people running while getting really good footage with these, so it makes me wonder how I would be walking too hard.
Josh Swan is offline   Reply With Quote
Old July 16th, 2009, 02:11 PM   #7
Trustee
 
Join Date: Jun 2007
Location: Toronto
Posts: 1,414
No, it's not "bad" Merlin,
do you have "gezornenplatz" screw in place?
with larger cameras it helps before you'll learn how to walk :)
__________________
I love this place!
Buba Kastorski is offline   Reply With Quote
Old July 16th, 2009, 02:16 PM   #8
Major Player
 
Join Date: Oct 2007
Location: London, UK
Posts: 792
This is difficult to figure out.
If you hold the plate still, can you move the camera ie is there any play?
I don't see how you can introduce vibrations whilst walking. Movement but not vibration.
__________________
http://www.gooderick.com
Richard Gooderick is offline   Reply With Quote
Old July 16th, 2009, 04:05 PM   #9
Trustee
 
Join Date: Dec 2006
Location: Central Coast - NSW, Australia
Posts: 1,420
maybe some footage would help - then we can see exactly what you're talking about
__________________
Cheers - Paul M.
www.relivetheday.com.au : www.perbenyik.com
Paul Mailath is offline   Reply With Quote
Old July 16th, 2009, 11:06 PM   #10
Trustee
 
Join Date: Jun 2006
Location: Burbank
Posts: 1,811
Keep the arm and shoulder holding the Merlin relaxed.

Instead of taking steps, walk in a continuous, unbroken relaxed movement cycle.

Without the Merlin, practice walking in smooth slow motion, controlling the muscles in a very relaxed way. It will be difficult at first, but improvement here will show in the Merlin later.
Jack Walker is offline   Reply With Quote
Old July 17th, 2009, 07:25 AM   #11
Regular Crew
 
Join Date: Nov 2008
Location: Scarborough Me
Posts: 186
Buba- I do have the g-platz screw in place. It's touching between the zoom ring and the aperture ring.

Richard- there is no play while holding the plate. The plate flexes a tiny bit, but it's mounted on the cam securely.

Paul- I'll try to post some footage.

Jack- Thanks. I'll try practicing walking this way.
Josh Swan is offline   Reply With Quote
Old July 17th, 2009, 07:41 AM   #12
Major Player
 
Join Date: May 2008
Location: Bedfordshire, UK
Posts: 863
You should be able to walk normally and have no problems. Vibrations are normally because something is loose.

Try asking on the steadicam forums in the newbies section or better yet contact Tiffen. their customer service is second to none both here in the UK and in the US. I had to get my pilot adjusted and was able to take it into my UK branch and they did it there and then.
Danny O'Neill is offline   Reply With Quote
Old July 17th, 2009, 11:03 AM   #13
Major Player
 
Join Date: Oct 2007
Location: London, UK
Posts: 792
One other thought.
I've seen the grub screws work loose on a Merlin that was rented out.
The screws I am referring to are the ones that hold the tubing of the curved arms to the mouldings that connect the tubes to the hinge.
Are any of these loose perhaps?
__________________
http://www.gooderick.com
Richard Gooderick is offline   Reply With Quote
Old July 17th, 2009, 04:53 PM   #14
Regular Crew
 
Join Date: Nov 2008
Location: Scarborough Me
Posts: 186
Grub screws were nice and tight. There seems to be a tiny bit of play in the joint where the arc adjustment knob is. It seems to be in the silver round channel that keeps each arc piece in position. In the locked position, if you grab the ends and try to move them together as if to touch the ends together, and then away from each other, I notice a bit of movement, and as in a bit, I mean just a little. I hope I explained that, so it made sense.
Josh Swan is offline   Reply With Quote
Old July 20th, 2009, 04:07 AM   #15
Major Player
 
Join Date: Oct 2007
Location: London, UK
Posts: 792
Quote:
Originally Posted by Josh Swan View Post
Grub screws were nice and tight. There seems to be a tiny bit of play in the joint where the arc adjustment knob is. It seems to be in the silver round channel that keeps each arc piece in position. In the locked position, if you grab the ends and try to move them together as if to touch the ends together, and then away from each other, I notice a bit of movement, and as in a bit, I mean just a little. I hope I explained that, so it made sense.
There shouldn't be any movement when the lock is engaged. This could be the problem. I suggest calling the manufacturer or the retailer. It may need fixing.
__________________
http://www.gooderick.com
Richard Gooderick is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > Support Your Local Camera > Stabilizers (Steadicam etc.)

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 03:03 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network