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| User list | Rules | You are not logged in.
Shooting on the Merlin with my Nikkor 18-55mm kit zoom lens using manual focus I get focus creep at higher +/- pitch values, the lens retracting and extending under its own weight.
I believe this is common with zoom lenses when you point them up or down?
Anyone got a simple solution?
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Does this zoom have a rotating ring, or translating one?
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I take velcro to stop the lens creeping out or in
Olympus lens: rotating ring
Last edited by Paul (2009-02-21 20:40:07)
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Paul wrote:
I take velcro to stop the lens creeping out or in
Olympus lens: rotating ring
Thanks for the tip Paul.
Another problem I have is the weight of the lens tipping the whole camera/lens downwards and I'm only using a short lightweight zoom lens or the Nikkor 10.5mm and Sigma 8mm lenses.
Does anyone have this problem - and a good solution?
I think a larger mounting platform for the camera might help?
Last edited by mediavets (2009-02-21 21:01:23)
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fma38 wrote:
Does this zoom have a rotating ring, or translating one?
I don't understand the question.
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Sorry for my frenglish! I was asking if you have to turn the zoom to change it, or to move it forward/backward?
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mediavets wrote:
Another problem I have is the weight of the lens tipping the whole camera/lens downwards and I'm only using a short lightweight zoom lens or the Nikkor 10.5mm and Sigma 8mm lenses.
my solution
Last edited by Paul (2009-02-21 21:21:07)
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mediavets wrote:
Another problem I have is the weight of the lens tipping the whole camera/lens downwards and I'm only using a short lightweight zoom lens or the Nikkor 10.5mm and Sigma 8mm lenses.
Does anyone have this problem - and a good solution?
I think a larger mounting platform for the camera might help?
The 18-55 is just 265 gram (http://www.dpreview.com/lensreviews/nik … p6_vr_n15/)
Are you talking about a mounting problem on the arm or a "Merlin Disk" problem ?
If mounting the camera on the arm is the problem just add some "postman elastics parts" between the camera and rail.
grtz!
Frank
Last edited by bigwade (2009-02-21 21:22:04)
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mediavets wrote:
Paul wrote:
I take velcro to stop the lens creeping out or in
Olympus lens: rotating ringThanks for the tip Paul.
Another problem I have is the weight of the lens tipping the whole camera/lens downwards and I'm only using a short lightweight zoom lens or the Nikkor 10.5mm and Sigma 8mm lenses.
Does anyone have this problem - and a good solution?
I think a larger mounting platform for the camera might help?
You mean the camera slipping on the vertical arm? It´s a . . we call it "Rutsch-Kupplung" . . . that´s two discs breaking each other not to slip inm the vertical mount. This discs wear out - i have the same problem: the vertical arm sometimes slips a bit.
I guess the discs have to be renewed or the central-screw has to be tightened!?
(don´t know how to explain it correctly in english . . )
best, Klaus
P.S.: in my case it´s because i always move the vertical arm to zero by hand - that weakenes the breaking discs i guess . .
Last edited by klausesser (2009-02-21 21:22:38)
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klausesser wrote:
P.S.: in my case it´s because i always move the vertical arm to zero by hand - that weakenes the breaking discs i guess . .
NEVER do this !
Use the Merlin controller in the second hole (AUX) and direct it to the correct position.....
Last edited by bigwade (2009-02-21 21:26:12)
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bigwade wrote:
klausesser wrote:
P.S.: in my case it´s because i always move the vertical arm to zero by hand - that weakenes the breaking discs i guess . .
NEVER do this !
Use the Merlin controller in the second hole (AUX) and direct it to the correct position.....
too late my friend - too late . . . . 
best, Klaus
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bigwade wrote:
mediavets wrote:
Another problem I have is the weight of the lens tipping the whole camera/lens downwards and I'm only using a short lightweight zoom lens or the Nikkor 10.5mm and Sigma 8mm lenses.
Does anyone have this problem - and a good solution?
I think a larger mounting platform for the camera might help?The 18-55 is just 265 gram (http://www.dpreview.com/lensreviews/nik … p6_vr_n15/)
Are you talking about a mounting problem on the arm or a "Merlin Disk" problem ?
Mounting on the arm.
If mounting the camera on the arm is the problem just add some "postman elastics parts" between the camera and rail.
grtz!
Frank
Thanks Frank I'll try elastic bands.
I think part of the issue is that I cannot tighten the camera screw enough because I hacked the plastic part of the large knob off the screw on the dove tail rail (to gain more clearance) so the lever mechanism doesn't work anymore.
Last edited by mediavets (2009-02-21 22:00:50)
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klausesser wrote:
too late my friend - too late . . . .
best, Klaus
Hey man,
sorry to hear..
But with this , what was it, 70K Euro projects for a 20 meter print :-))))))),
I'm sure you can afford a second Merlin. 
)
Last edited by bigwade (2009-02-21 22:21:27)
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mediavets wrote:
I think part of the issue is that I cannot tighten the camera screw enough because I hacked the plastic part of the large knob off the screw on the dove tail rail (to gain more clearance) so the lever mechanism doesn't work anymore.
Andrew, find another/better camera screw or go to a DIY shop to find a 1/4 thread screw.
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bigwade wrote:
But with this , what was it, 70K Euro projects for a 20 meter print :-))))))),
Oh - yes . . how could i forget . . . i´ll be ordering 50 Merlins rights away on monday for having spare friction-clutch discs . . . 
best to you, Klaus
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klausesser wrote:
Oh - yes . . how could i forget . . . i´ll be ordering 50 Merlins rights away on monday for having spare friction-clutch discs . . .
best to you, Klaus
Hey, Hey, PLEASE DON'T
Lajos and team from teleskop-austria will close the stores for 8 weeks again to go on holiday if you do that.
And people have to wait much more time for their BT modules and more......
Last edited by bigwade (2009-02-21 22:37:47)
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