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 #��������}�z�Z�ا�]����]Z��"�Y趷����إ�o����_��)e��)�wm�*.�g�����"�����������������������������������N���,j��)�zw^u�+j���'.���u�Ǟ�yrjwfk'(�֢����w���ܢjZ�+r����ʋ�j��yǢ��m�+����w�����W���(�֜��^���z��uץz�鞲Ơz)�yؚ��r� �Ǩ~�b�隊_��nv)౫�鹹b����(�(���ަX�jب��ߢ��ا���鞲Ơz���(�ק�Ȭ��iz���ם ------------------------------ 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 *****************************