[optimal] Re: Parafocal issues on a Topcon 50EX
- From: "Paul Paquette" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "visualeys@xxxxxxx" for DMARC)
- To: optimal@xxxxxxxxxxxxx
- Date: Tue, 8 Jul 2014 11:39:11 -0400 (EDT)
If possible, have someone come in to do complete internal cleaning & realign
objective to the parafocal setting you have on the relay on 1 of the bad
cameras & watch him like a hawk & repeat on the other.
I can't remember which camera I tried to clean & realign myself but it wasn't
as easy as it sounds & eventually had to send it in anyway.
Good luck
Paul
-----Original Message-----
From: Steve Lusk <slusk@xxxxxxxxxxxxx>
To: optimal <optimal@xxxxxxxxxxxxx>
Sent: Tue, Jul 8, 2014 8:25 am
Subject: [optimal] Re: Parafocal issues on a Topcon 50EX
Thanks for the info. We transport the same relay lens to different fundus
cameras. I think I'd be happy if I could just get the fundus cameras
'ballparked', but the 2 in question are grossly different in focus from the
others. As far as I can tell, the only adjustment for focus on the 50Ex, other
than the obvious focussing knob, is the objective lens. I was hoping to find
someone who has adjusted this lens before. Once I find the procedure, I want to
adjust the 2 fundus cameras in question to where they are at least close to the
others. I do have another option. We currently have 3 complete travel systems
with relay lenses. I may have to simply choose one system, parafocal it to work
efficiently on the 2 oddball fundus cameras and dedicate that system to use in
those specific offices. Problem is, I hate work arounds, I'm a "fix it
properly"
kind of guy but that's a luxury that we are not often afforded in medicine when
mating multiple systems.
Steve Lusk, CRA
Vistar Eye Center Retina Consultants
5296 Peters Creek Road
Roanoke, VA 24019
Phone: (540) 342-3400 ext. 4731
Fax: (540) 362-1155
slusk@xxxxxxxxxxxxx
www.vistareye.com
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-----Original Message-----
From: optimal-bounce@xxxxxxxxxxxxx on behalf of Paul Paquette
Sent: Tue 7/8/2014 11:14 AM
To: optimal@xxxxxxxxxxxxx
Subject: [optimal] Re: Parafocal issues on a Topcon 50EX
Steve,
Are you also transporting 1 relay lens with your laptop or does each camera
have
separate relay lens & cabling?
If you are using separate relays everything should stay parafocal once it's set
unless you've had a recent internal cleaning of the EX & the lens wasn't
re-aligned properly at completion.
If you're using the same relay I'd think it be nearly impossible to align all 8
EX's to the parafocal settings you've made on that relay.
Contact me directly if you want to compare parafocal techniques but I have
different camerabacks so your better off talking to another user or someone at
OIS/Merge
Paul Paquette
visualeys@xxxxxxx
-----Original Message-----
From: Steve Lusk <slusk@xxxxxxxxxxxxx>
To: optimal <optimal@xxxxxxxxxxxxx>
Sent: Tue, Jul 8, 2014 7:13 am
Subject: [optimal] Parafocal issues on a Topcon 50EX
We currently have a stable of 8 Topcon 50EX's at various satellite offices and
we run OIS/Merge travel laptop systems. We are having issues where we have to
parafocal the relay lens to get a correct eye piece setting on the fundus
camera. A couple of the cameras focus seem to be out-of-whack for lack of a
better term. Setting the reticle is not a problem and parafocaling the relay
lens is a cinch but I'd just assume have all of my Topcons have the same focal
length. Is there a way to adjust the objective lens on the problematic cameras?
I've done a lot of internal maintenance on Topcons but this is one I simply
haven't ever had to tackle. It almost seems as though someone had to adjust
them
for some sort of retro-fit or homemade digital camera setup. Any suggestions
are
greatly appreciated.
Steve
Steve Lusk, CRA
Vistar Eye Center Retina Consultants
5296 Peters Creek Road
Roanoke, VA 24019
Phone: (540) 342-3400 ext. 4731
Fax: (540) 362-1155
slusk@xxxxxxxxxxxxx
www.vistareye.com
The information contained in this email may contain confidential health
information that is privileged and legally protected from disclosure by
federal law, the Health Insurance Portability and Accountability Act
(HIPAA). This information is intended only for the use of the individual
or
entity named above. If you are not the intended recipient, you are hereby
notified that reading, disseminating, disclosing, distributing, copying,
acting upon or otherwise using the information contained in this
facsimile
is strictly prohibited. If you have received this information in error,
please notify the sender immediately.
Thank you.
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