[optimal] Re: Reflection on TRC50X
- From: angiolith@xxxxxxx
- To: optimal@xxxxxxxxxxxxx
- Date: Tue, 29 Nov 2011 10:47:10 -0500 (EST)
As John said, you can usually focus right on the objective lens using the "-"
diopter setting. Chances are it is dirt/tears on the lens, but it could also
be scratches in the lens coating.
More infrequently it is a misalignment of one of the wheels or levers: check
that the astigmatic slide is all the way in, that the mag lever and filter
wheels are in their detents, and that the small pupil wheel is clicked back in.
If the lens is dirty, you may need a solvent to fully remove the oils from the
lens. We have had the most success with acetone and cotton balls. We have had
scratching when using lens cleaning tissue!
Marty Rothenberg
Angiographics, Inc
-----Original Message-----
From: FreeLists Mailing List Manager <ecartis@xxxxxxxxxxxxx>
To: optimal digest users <ecartis@xxxxxxxxxxxxx>
Sent: Tue, Nov 29, 2011 1:11 am
Subject: optimal Digest V2 #244
optimal Digest Mon, 28 Nov 2011 Volume: 02 Issue: 244
In This Issue:
[optimal] Reflection on TRC50X
[optimal] Re: Reflection on TRC50X
[optimal] Larson, Eric is out of the office.
[optimal] Re: Reflection on TRC50X
----------------------------------------------------------------------
Subject: [optimal] Reflection on TRC50X
Date: Mon, 28 Nov 2011 09:57:02 -0500
From: "Dave Lehnhardt" <dlehnhardt@xxxxxxxxxxxxx>
We have a Topcon TRC50X camera that has a reflection dead center of the
color and red free image. It appears to be increasingly worse. The
reflection appears to be from the flash of the camera. Objective lens
issue? Thoughts?
David Lehnhardt
Director of Operations
Retina Vitreous Associates
419-469-5505
DLehnhardt@xxxxxxxxxxxxx
------------------------------
Subject: [optimal] Re: Reflection on TRC50X
Date: Mon, 28 Nov 2011 10:12:24 -0600
From: "Peterson John C" <JPeterson@xxxxxxxxxxxx>
Ahh, the infamous "Topcon edema". Most likely a dirty lens. Dial in the
minus diopter, then rack focus back all the way, then turn the viewing
light up to full to visualize the culprit.
********
John C. Peterson, BS, CRA
Director of Ophthalmic Photography Services
UW Health Eye Clinic
2880 University Ave., Rm. 246
Madison, WI 53705
(608) 263-7163
________________________________
From: optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx]
On Behalf Of Dave Lehnhardt
Sent: Monday, November 28, 2011 8:57 AM
To: optimal@xxxxxxxxxxxxx
Subject: [optimal] Reflection on TRC50X
We have a Topcon TRC50X camera that has a reflection dead center of the
color and red free image. It appears to be increasingly worse. The
reflection appears to be from the flash of the camera. Objective lens
issue? Thoughts?
David Lehnhardt
Director of Operations
Retina Vitreous Associates
419-469-5505
DLehnhardt@xxxxxxxxxxxxx
------------------------------
Subject: [optimal] Larson, Eric is out of the office.
From: e.larson@xxxxxxxxxxxxxxxxx
Date: Mon, 28 Nov 2011 10:06:48 -0800
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------------------------------
Date: Mon, 28 Nov 2011 18:29:21 -0800 (PST)
From: Jef Jodell <mpscra@xxxxxxxxx>
Subject: [optimal] Re: Reflection on TRC50X
Agreed.
Also, the "alignment option", which we used to call "white dots", will show up
on mono chromatic setting. Disable it prior to shooting an FA.
________________________________
From: Peterson John C <JPeterson@xxxxxxxxxxxx>
To: optimal@xxxxxxxxxxxxx
Sent: Monday, November 28, 2011 11:12 AM
Subject: [optimal] Re: Reflection on TRC50X
Ahh, the infamous "Topcon edema". Most likely a dirty lens.
Dial in the minus diopter, then rack focus back all the way, then turn the
viewing light up to full to visualize the culprit.
********
John C. Peterson, BS, CRA
Director of Ophthalmic Photography
Services
UW Health
Eye Clinic
2880
University Ave., Rm. 246
Madison, WI 53705
(608) 263-7163
�
________________________________
From: optimal-bounce@xxxxxxxxxxxxx
[mailto:optimal-bounce@xxxxxxxxxxxxx] On Behalf Of Dave
Lehnhardt
Sent: Monday, November 28, 2011 8:57 AM
To: optimal@xxxxxxxxxxxxx
Subject: [optimal] Reflection on
TRC50X
We have a Topcon TRC50X camera that has a reflection dead
center of the color and red free image.� It appears to be increasingly
worse.� The reflection appears to be from the flash of the camera.�
Objective lens issue?� Thoughts?
�
David
Lehnhardt
Director of
Operations
Retina Vitreous
Associates
419-469-5505
DLehnhardt@xxxxxxxxxxxxx
------------------------------
End of optimal Digest V2 #244
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