[optimal] Re: Problem with Nikon D200
- From: John Gerty <gertyjm@xxxxxxxxx>
- To: "optimal@xxxxxxxxxxxxx" <optimal@xxxxxxxxxxxxx>
- Date: Tue, 15 Oct 2013 18:39:32 -0700 (PDT)
You might try attaching a ground wire from the camera to the slit lamp.
Or try electrically isolating the digital camera from the slit lamp. Is the
dove tail mount plastic or metal?
You may want to try looking through the eyepiece of the digital camera to see
if the shutter blocks your view as it records an image.
Alternatively, you may want to try propping the mirror out of the way to see if
it isn't synching.
Did you say if there is a review image appearing on the camera's view screen?
You said you could see through the beam splitter. How about hooking up the
D200; then trigger it while you are looking through the beam splitter? Or
similarly, put a lens on the Nikon back, then focus it over the slit lamp to
see if it captures a synched strobe image?
Another thought, do you have sufficient clearance. Could the mount have been
tightened too much resulting some interference? Are there filters?
Is there an iris in the beam splitter arm? Are you able to find any sort of
latent image in photoshop? This would at least indicate there is something
being recorded. You could try another Nikon digital camera.
JMG
On Tuesday, October 15, 2013 6:23 PM, CPMC Ophthalmic Diagnostic Center
<cpmceyelab@xxxxxxxxxxxxxxxx> wrote:
Beamsplitter lever, no. It’s built into the mechanism of the slit lamp .
There is no lever
>
>You can look through the camera port and see the room. Nothing is blocking
>
>When I remove from the slit lamp, and look throught the ports of the slit
>lamp, using 10,20,30 x magnification, I can see through the lenses and across
>the room
>
>So it does not appear that ANYTHING is hanging down or blocking the light.
>
>
>
>Denice Barsness, CRA, COMT, ROUB, CDOS, FOPS
>Ophthalmic Diagnostic Center
>CPMC Department of Ophthalmology
>2100 Webster Street Suite 212
>San Francisco CA 94115
>(415) 600-3937 FAX (415) 600-6563
>
>From:optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx] On
>Behalf Of George Henry, CRA, PBT
>Sent: Tuesday, October 15, 2013 3:34 PM
>To: optimal@xxxxxxxxxxxxx
>Subject: [optimal] Re: Problem with Nikon D200
>
>Does that slit lamp have a beamsplitter lever that must be flipped to direct
>the image to the camera port? Has someone inadvertently flipped it?
>
>Take the camera off and look into the camera port with a brightly lit subject
>in front of the SL… do you see anything?
>
>George E. Henry, CRA, PBT
>Wheaton Eye Clinic, Ltd.
>2015 N. Main Street
>Wheaton IL 60187
>630.588.3615
>
>________________________________
>
>From:optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx] On
>Behalf Of CPMC Ophthalmic Diagnostic Center
>Sent: Tuesday, October 15, 2013 17:20
>To: 'optimal@xxxxxxxxxxxxx'
>Subject: [optimal] Re: Problem with Nikon D200
>
>Back to the drawing board. New cables, still no image
>
>MUST be somewhere in the mechanism of the slit lamp itself, as system is
>getting power, cable is sending to Camera Control Pro software OK, camera back
>works fine when NOT connected to slit lamp, Shutter is tripping, flash is
>engaging.
>
>Any more thoughts?
>
>Denice Barsness, CRA, COMT, ROUB, CDOS, FOPS
>Ophthalmic Diagnostic Center
>CPMC Department of Ophthalmology
>2100 Webster Street Suite 212
>San Francisco CA 94115
>(415) 600-3937 FAX (415) 600-6563
>
>From:CPMC Ophthalmic Diagnostic Center
>Sent: Tuesday, October 15, 2013 9:40 AM
>To: 'optimal@xxxxxxxxxxxxx'
>Subject: RE: [optimal] Re: Problem with Nikon D200
>
>That’s it! Shutter, which I always thought was working, confirmed.
>
>Need new cables!
>
>So grateful to tap into all of the expertise!
>
>
>Denice
>
>Denice Barsness, CRA, COMT, ROUB, CDOS, FOPS
>Ophthalmic Diagnostic Center
>CPMC Department of Ophthalmology
>2100 Webster Street Suite 212
>San Francisco CA 94115
>(415) 600-3937 FAX (415) 600-6563
>
>From:optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx] On
>Behalf Of JamesStrong
>Sent: Tuesday, October 15, 2013 9:20 AM
>To: optimal@xxxxxxxxxxxxx
>Subject: [optimal] Re: Problem with Nikon D200
>
>Denice
>
>Have you tried leaving the camera wired to the SL but taking it off the mount
>and holding the body toward a ceiling light while looking into the lens mount
>and firing it as you would thru the slitlamp?
>
>This way you can rule out mirrow/shutter issues being caused by the
>wires/triggers of the SL. Then you're down to software or FW cables. My next
>step would be a different FW cable. We ran into a situation like that when we
>tried to connect a trigger cable and there was a weird polarity issue thar
>reversed the function of the mirror. It locked up when connected and DROPPED
>when the shutter was activated.
>
>FWIW - we shoot with the D200 on 1/250 on our old Zeiss SL, a slower sync
>shouldn't matter and i know you said none of that has changed.
>
>j-
>On Mon, Oct 14, 2013 at 7:15 PM, CPMC Ophthalmic Diagnostic Center
><cpmceyelab@xxxxxxxxxxxxxxxx> wrote:
>Yes, that’s the default. No card in the camera, firewired to computer.
>Black image
>
>
>Unhook camera, slap on a lens, put in a memory card, wal la, a photo!
>
>Denice Barsness, CRA, COMT, ROUB, CDOS, FOPS
>Ophthalmic Diagnostic Center
>CPMC Department of Ophthalmology
>2100 Webster Street Suite 212
>San Francisco CA 94115
>(415) 600-3937 FAX (415) 600-6563
>
>From:optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx] On
>Behalf Of John Gerty
>Sent: Monday, October 14, 2013 4:09 PM
>
>To: optimal@xxxxxxxxxxxxx
>Subject: [optimal] Re: Problem with Nikon D200
>
>Have you tried shooting without the card in the camera? Is there a setting
>which directs the output? With our home brewed system we do not have a memory
>card in the camera back, only a hard wired connection.
>
>JMG
>
>On Monday, October 14, 2013 5:13 PM, CPMC Ophthalmic Diagnostic Center
><cpmceyelab@xxxxxxxxxxxxxxxx> wrote:
>Camera works fine disconnected from firewire, with card
>>Flash, shutter, all OK
>>
>>USB and Firewire cable are being recognized by computer as being valid and
>>live
>>
>>However, when card in slit lamp, connected to Firewire, photos are black
>>
>>Checked settings. Shutter at 125. ISO 400. Nothing’s changed
>>
>>
>>
>>Denice Barsness, CRA, COMT, ROUB, CDOS, FOPS
>>Ophthalmic Diagnostic Center
>>CPMC Department of Ophthalmology
>>2100 Webster Street Suite 212
>>San Francisco CA 94115
>>(415) 600-3937 FAX (415) 600-6563
>>
>>From:optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx] On
>>Behalf Of John Gerty
>>Sent: Monday, October 14, 2013 12:15 PM
>>To: optimal@xxxxxxxxxxxxx
>>Subject: [optimal] Re: Problem with Nikon D200
>>
>>Short term, see if your camera can write to an SD card or whatever card it
>>uses. You could then transfer the images to your CPU this way.
>>
>>Specifically, what shutter speed are you using?
>>
>>Is there an X-synch setting which may have been turned off or reset somehow?
>>
>>Do you see a preview image on the camera's screen?
>>
>>I have had cables fail and camera plugs fail. Firewire, especially the small
>>firewire plugs are more prone to this than USB.
>>
>>Turn everything off, then spray contact cleaner on all the connections, plug
>>and unplug those connectors while they are wet with the cleaner. Careful, it
>>might be flammable and definitely bad to breathe.
>>
>>JMG
>>
>>On Monday, October 14, 2013 1:50 PM, CPMC Ophthalmic Diagnostic Center
>><cpmceyelab@xxxxxxxxxxxxxxxx> wrote:
>>Help!
>>>
>>>My OLD Nikon FS3V slit lamp camera with D200 Nikon Back
>>>
>>>Have double/triple checked all settings on D200
>>>
>>>Rechecked, rehooked cables
>>>
>>>Flash is engaging
>>>Shutter opens. You hear it
>>>
>>>Fireware sending BLACK image to computer. Something is blocking light from
>>>camera to Firewire to computer
>>>
>>>Bad Firewire cable? Flash appears to be going off fine. SOUND and setting
>>>of shutter OK
>>>
>>>Your thoughts before I cry uncle and spend a lifetime on the phone with
>>>Nikon?
>>>
>>>Denice Barsness, CRA, COMT, ROUB, CDOS, FOPS
>>>Ophthalmic Diagnostic Center
>>>CPMC Department of Ophthalmology
>>>2100 Webster Street Suite 212
>>>San Francisco CA 94115
>>>(415) 600-3937 FAX (415) 600-6563
>>>
>>>
>>
>
>
>________________________________
>
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>
>
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