[optimal] Re: Zeiss FF450 Plus flash/expopsure question
- From: Angiographics <angiolith@xxxxxxx>
- To: optimal@xxxxxxxxxxxxx
- Date: Wed, 22 May 2013 06:57:37 -0400 (EDT)
We had a very similar experience with a Zeiss 450 with MRP Ophthavision
software. We added a neutral density filter to the slider on the top port (the
digital pickup is on Port 2 on our system), which we use for color photos. We
ended up having to use a very dense filter to be sure to be able to deal with
any eye. We are able to use an average flash of about #6 for colors.
We pull the filter out for angiography, allowing us to shoot the FA's at a
fairly low flash, too (about #10). Works great and patients (even ones
professing severe photophobia) seem very comfortable.
Putting the ND on the side slider means you have to view through it.
Marty Rothenberg
Re: Zeiss FF450 Plus flash/expopsure question
-----Original Message-----
From: FreeLists Mailing List Manager <ecartis@xxxxxxxxxxxxx>
To: optimal digest users <ecartis@xxxxxxxxxxxxx>
Sent: Wed, May 22, 2013 1:27 am
Subject: optimal Digest V4 #97
optimal Digest Tue, 21 May 2013 Volume: 04 Issue: 097
In This Issue:
[optimal] Receiving all messages TWICE
[optimal] OIS WS-5000 problem
[optimal] fluorescein reactions? 10% vs 25%
[optimal] Re: fluorescein reactions? 10% vs 25%
[optimal] Re: fluorescein reactions? 10% vs 25%
[optimal] Re: OIS WS-5000 problem
[optimal] Re: Receiving all messages TWICE
[optimal] Re: OIS WS-5000 problem
[optimal] Zeiss FF450 Plus flash/expopsure question
[optimal] Re: Zeiss FF450 Plus flash/expopsure question
[optimal] Re: Zeiss FF450 Plus flash/expopsure question
[optimal] Re: Zeiss FF450 Plus flash/expopsure question
[optimal] Re: Zeiss FF450 Plus flash/expopsure question
----------------------------------------------------------------------
From: "Breit, Peter" <BreitP@xxxxxxxx>
Date: Tue, 21 May 2013 10:06:16 -0400
Subject: [optimal] Receiving all messages TWICE
!��yǢ�)�jYfz���X���br��(!�&�����Ȳ�b��k��^����m�f����1#��Z(��肶��8Z�L����z����ފ��DÊ����ΦajY�q'��'�8^-��zv��)�֥��ư�z,�+Z��8����}��8����ʹ�������~��n�����Z���
------------------------------
From: "Breit, Peter" <BreitP@xxxxxxxx>
Date: Tue, 21 May 2013 10:24:56 -0400
Subject: [optimal] OIS WS-5000 problem
Dear colleagues
The Fundus camera is a Topcon TRC-50 EX serial # 1350878
Digital camera is a Megavision 5M model FB-3020 10M (got this information from
the list of devices attached to the computer) - the number on the camera back
is
28R015455000
OIS is version 10.5.74.0 - the disc is dated 5/7/08 but I am not sure of the
date that we installed it.
I am having camera (WS-5000) problems, I believe it is the connection of the
Firewire to the camera. The Firewire is new but as soon as it touch it
inadvertently the computer cannot find the camera and gives me the following
error codes:
1. " Too many errors reentering capture cycle attempting to start camera
WS-5000 Color"
2. " Attempt to reinitialize camera WS-5000 Color failed. System now will
stop
capture using this camera until
program restarted and problem resolved. "
I don't believe it is a software problem, but I am not sure. There is a lot of
other stuff loaded on the computer for e-records, etc.
Any help is very much appreciated. Before I send the camera to Megavision for
repair.
Thank you
Peter
Peter L. Breit, CRA.
Director Ophthalmic Services
The Lankenau Hospital & Bryn Mawr Hospital
484-476-3338
484-476-8206 fax
484-437-3262 mobile
page 3707
------------------------------
From: "Breit, Peter" <BreitP@xxxxxxxx>
Date: Tue, 21 May 2013 11:46:41 -0400
Subject: [optimal] fluorescein reactions? 10% vs 25%
"�ڦ�r��[b��{�(�'���k�ֲ�Ʋ��]���:<����m�f����zX�����n7����ئj_ߖ�+z��z�i�b�{���-j{��Ȟ�؟��.����W���!��aj�^���i�b�{��O�n�~[���z)�#��,�x-��H���i�.��ޥ�bz{^����^�'�����zj+z�Z�;��v����wb���zv���_���y��)�x��yƥ��Z����V�q�譪�i�b����'�&�{
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��a��(�˥�)�{'�r�������ܢ�)��h����/ܢ{.�ا����&�;���j|�{/�ٚ�_ܢo�j)m����b�������fj)�r��
------------------------------
From: "Darrin Landry, CRA, OCT-C" <Darrin@xxxxxxxxxxxxxxxx>
Subject: [optimal] Re: fluorescein reactions? 10% vs 25%
Date: Tue, 21 May 2013 10:00:22 -0700
In my experience, if you ask 5 ophthalmic photographers, you will get 5
different answers, and 5 ways to do it correctly.
Darrin Landry, CRA, OCT-C
Bryson Taylor Inc.
Ophthalmic Consultants and Training
www.brysontaylor.com
phone 207-838-0961
fax 207-809-4550
www.brysontaylorpublishing.com
----------------------------------------
From: "Breit, Peter" <BreitP@xxxxxxxx>
Sent: Tuesday, May 21, 2013 12:58 PM
To: "optimal@xxxxxxxxxxxxx" <optimal@xxxxxxxxxxxxx>
Subject: [optimal] fluorescein reactions? 10% vs 25%
I use AKORN 25% and have no problems with nausea unless the room is very warm
and the patient is African-American or Indian. Dark or light FlSd makes no
difference.
10% slower injection I use only very occasionally when I have to shoot lots of
peripheral shoots (BDR) on both eyes.
If you inject 5cc very fast you will get nausea almost every time, just my
opinion after my 45 years of experience with this stuff.
Time to retire ..
Thank you friends
Peter
Peter L. Breit, CRA.
Director Ophthalmic Services
The Lankenau Hospital & Bryn Mawr Hospital
484-476-3338
484-476-8206 fax
484-437-3262 mobile
page 3707
----------------------------------------
From: optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx] On
Behalf Of CPMC Ophthalmic Diagnostic Center
Sent: Friday, May 17, 2013 4:45 PM
To: optimal@xxxxxxxxxxxxx
Subject: [optimal] Re: fluorescein reactions?
Anecdotally, our incident of reaction is too low to statistically track. We
almost never see nausea either.
Personally, I'm convinced it speaks to volume of solution, and/or good patient
management.
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 copcphotography@xxxxxxxxxxxxxxxxx
Sent: Friday, May 17, 2013 12:46 PM
To: optimal@xxxxxxxxxxxxx
Subject: [optimal] fluorescein reactions?
just an unscientific survey please
which has less reactions? 10% or 25% fluorescein?
I'm guessing that I have about one patient everyother year will have more than
just nausea. And its been about four years since I've called an ambulance for
a
reaction.
And only a few per year that will be more than just nauseated, but full out
vomiting. (those aren't fun)
Just curious.
Lori
Lori Guerette, CRA COA
Consulting Ophthalmologists, PC
704 Hebron Ave, Ste 200
Glastonbury , CT 06030
860-678-0202
860-304-4703
copcphotography@xxxxxxxxxxxxxxxxx
justhitanykey@xxxxxxxxxxx
------------------------------
Subject: [optimal] Re: fluorescein reactions? 10% vs 25%
From: kevinlangton@xxxxxxxxx
Date: Tue, 21 May 2013 17:04:37 +0000
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------------------------------
Date: Tue, 21 May 2013 12:33:06 -0500
Subject: [optimal] Re: OIS WS-5000 problem
From: John Horna <johnhorna@xxxxxxxxx>
My educated guess would be static electricity.
Look in Device Manager (assume Win XP), and the camera is likely
unrecognized, but a reboot will make it OK again.
Perhaps if you can ground it, it may eliminate the problem. You can also
try diconnecting and reconnecting Firewire to the computer prior to reboot,
but I would not hold my breath on that one.
John
On Tue, May 21, 2013 at 9:24 AM, Breit, Peter <BreitP@xxxxxxxx> wrote:
> ********
>
> Dear colleagues ****
>
> ** **
>
> The Fundus camera is a Topcon TRC-50 EX serial # 1350878****
>
> Digital camera is a Megavision 5M model FB-3020 10M (got this information
> from the list of devices attached to the computer) � the number on the
> camera back is 28R015455000****
>
> OIS is version 10.5.74.0 � the disc is dated 5/7/08 but I am not sure of
> the date that we installed it.****
>
> ** **
>
> I am having camera (WS-5000) problems, I believe it is the connection of
> the Firewire to the camera. The Firewire is new but as soon as it touch it
> inadvertently the computer cannot find the camera and gives me the
> following error codes:****
>
> ** **
>
> 1. � Too many errors reentering capture cycle attempting to start
> camera WS-5000 Color�****
> 2. � Attempt to reinitialize camera WS-5000 Color failed. System now
> will stop capture using this camera until ****
>
> program restarted and problem resolved. �****
>
> ** **
>
> I don�t believe it is a software problem, but I am not sure. There is a
> lot of other stuff loaded on the computer for e-records, etc.*
> ***
>
> ** **
>
> Any help is very much appreciated. Before I send the camera to Megavision
> for repair. ****
>
> ** **
>
> * *
>
> *Thank you*****
>
> *Peter*****
>
> ****
>
> Peter L. Breit, CRA.****
>
> Director **Ophthalmic Services******
>
> The ****Lankenau** **Hospital & Bryn** **Mawr** **Hospital********
>
> 484-476-3338****
>
> 484-476-8206 fax****
>
> 484-437-3262 mobile ****
>
> page 3707****
>
> ****
>
> ****
>
> ****
>
> ****
>
> ****
>
> ** **
>
------------------------------
Date: Tue, 21 May 2013 12:34:26 -0500
Subject: [optimal] Re: Receiving all messages TWICE
From: John Horna <johnhorna@xxxxxxxxx>
Only see this message, as all others, once.
Perhaps you signed up twice with same email address but slightly different
name?
John
On Tue, May 21, 2013 at 9:06 AM, Breit, Peter <BreitP@xxxxxxxx> wrote:
> ********
>
> I am receiving all messages TWICE, which is highly annoying.****
>
> ** **
>
> Is this a problem with Optimal or my MS Outlook program ?****
>
> ** **
>
> *Thank you*****
>
> *Peter*****
>
> ****
>
> Peter L. Breit, CRA.****
>
> Director **Ophthalmic Services******
>
> The ****Lankenau** **Hospital & Bryn** **Mawr** **Hospital********
>
> 484-476-3338****
>
> 484-476-8206 fax****
>
> 484-437-3262 mobile ****
>
> page 3707****
>
> ****
>
> ****
>
> ****
>
------------------------------
Date: Tue, 21 May 2013 12:21:33 -0700 (PDT)
From: WCR Photo Department <photo@xxxxxxxxxxxxxxxxxxx>
Subject: [optimal] Re: OIS WS-5000 problem
Hi Peter,
We had the very same problem and fixed it with a new firewire cable.
Sean Grout
Photo Dept Manager
West Coast Retina
185 Berry Street, ste 130
San Francisco, CA 94107
(415) 972-4634
--- On Tue, 5/21/13, John Horna <johnhorna@xxxxxxxxx> wrote:
From: John Horna <johnhorna@xxxxxxxxx>
Subject: [optimal] Re: OIS WS-5000 problem
To: optimal@xxxxxxxxxxxxx
Date: Tuesday, May 21, 2013, 10:33 AM
My educated guess would be static electricity.
Look in Device Manager (assume Win XP), and the camera is likely unrecognized,
but a reboot will make it OK again.
Perhaps if you can ground it, it may eliminate the problem. You can also try
diconnecting and reconnecting Firewire to the computer prior to reboot, but I
would not hold my breath on that one.
John
On Tue, May 21, 2013 at 9:24 AM, Breit, Peter <BreitP@xxxxxxxx> wrote:
Dear colleagues
The Fundus camera is a Topcon TRC-50 EX serial # 1350878
Digital camera is a Megavision 5M model FB-3020 10M (got this information from
the list of devices attached to the computer) – the number on the camera back
is
28R015455000
OIS is version 10.5.74.0 – the disc is dated 5/7/08 but I am not sure of the
date that we installed it.
I am having camera (WS-5000) problems, I believe it is the connection of the
Firewire to the camera. The Firewire is new but as soon as it touch it
inadvertently the computer cannot find the camera and gives me the following
error codes:
“ Too many errors reentering capture cycle attempting to start camera WS-5000
Color”
“ Attempt to reinitialize camera WS-5000 Color failed. System now will stop
capture using this camera until
program restarted and problem resolved. “
I don’t believe it is a software problem, but I am not sure. There is a lot of
other stuff loaded on the computer for e-records, etc.
Any help is very much appreciated. Before I send the camera to Megavision for
repair.
Thank you
Peter
Peter L. Breit, CRA.
Director Ophthalmic Services
The Lankenau Hospital & Bryn Mawr Hospital
484-476-3338
484-476-8206 fax
484-437-3262 mobile
page 3707
------------------------------
From: Fernando Corrada <fcorrada@xxxxxxxxxxx>
Subject: [optimal] Zeiss FF450 Plus flash/expopsure question
Date: Tue, 21 May 2013 16:58:55 -0400
Hi fellow Optimalers.
Recently we purchased a new Zeiss FF-450 Plus IR camera to image with a
Merge/OIS WS5000 system. The only issue I have encountered is that the flash
output is quite strong for taking pictures of the DARC test eye. I am using the
lowest flash setting on the FF450 (1) and an ISO of 1oo on the sensor.
I am curious about how other people have solved this issue. ND filter on the
WS5000 sensor or on the FF450 filter slider? Changed the sensor sensitivity
settings in the ini files? Or.....?
I did call DARC and they suggested to take the color images with the green
filter (red free) in place but that did not work either. The colors photos and
the red frees are way overexposed. The FA images are fine.
A level 2 tech at Zeiss said that I could not use the slider filter on the
FF450
with an ND filter. That it is only used for green filters & FA filters. They
did
not explain in detail why it is not possible. I think it should work but I do
not have a gelatin ND filter to try it out. I imagine that a 0.9 (3 stops) ND
filter would be fine. The other possibilty is to place an ND filter in front of
the WS5000 sensor but I hate to expose the sensor to dust and whatnot. What
have
you creative people have done? Thank you in advance.
Merge Healthcare/OIS is going to call me back with a solution which I think
involves an ND filter. Will see what they suggest.
Fernando B. Corrada
Burlington, VT
------------------------------
Date: Tue, 21 May 2013 17:05:36 -0400
Subject: [optimal] Re: Zeiss FF450 Plus flash/expopsure question
From: Noelle Pensec <npensec@xxxxxxxxx>
From time to time we use an ND filter in the slider slot. On our FF-450
plus, redfree images are often overexposed on the lowest flash setting for
patients with blonde retinas and reflective pathology. The filter was
purchased directly from Zeiss...
On May 21, 2013 4:59 PM, "Fernando Corrada" <fcorrada@xxxxxxxxxxx> wrote:
> Hi fellow Optimalers.
>
> Recently we purchased a new Zeiss FF-450 Plus IR camera to image with
> a Merge/OIS WS5000 system. The only issue I have encountered is that the
> flash output is quite strong for taking pictures of the DARC test eye. I am
> using the lowest flash setting on the FF450 (1) and an ISO of 1oo on the
> sensor.
> I am curious about how other people have solved this issue. ND filter on
> the WS5000 sensor or on the FF450 filter slider? Changed the sensor
> sensitivity settings in the ini files? Or.....?
>
> I did call DARC and they suggested to take the color images with the green
> filter (red free) in place but that did not work either. The colors photos
> and the red frees are way overexposed. The FA images are fine.
>
> A level 2 tech at Zeiss said that I could not use the slider filter on the
> FF450 with an ND filter. That it is only used for green filters & FA
> filters. They did not explain in detail why it is not possible. I think it
> should work but I do not have a gelatin ND filter to try it out. I imagine
> that a 0.9 (3 stops) ND filter would be fine. The other possibilty is to
> place an ND filter in front of the WS5000 sensor but I hate to expose the
> sensor to dust and whatnot. What have you creative people have done? Thank
> you in advance.
>
> Merge Healthcare/OIS is going to call me back with a solution which I
> think involves an ND filter. Will see what they suggest.
>
> Fernando B. Corrada
> Burlington, VT
>
------------------------------
Subject: [optimal] Re: Zeiss FF450 Plus flash/expopsure question
From: kevinlangton@xxxxxxxxx
Date: Tue, 21 May 2013 21:12:15 +0000
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����r۫z��&�j����+�{"�m�����h��zاjW�����j�l)��V!�0����^���I��~�&�%^�,�h�zW��Zr@^������:���v�1�,j�����&���W�z{s��z{s�&j)�r��I��z��ئj_ۢ��{��y�b�����j��N���S�m5�^�ӟ��:���m�f����zX�����z�r�:���b���~���+-��+�+���-��)�)���^��E�����!��i��.��z�b�qk�kb��h�)���y������^�X�z�%��Ξ��_��Je���y��y�j�j��~ק���{h��h��^�����j�lz�b�讖�������h�zاjƧv����-���j�h��2�8^~)mz����r�y�b��-�'�f^�����1�����~������^�v�v�����k��r��i����fj)�r��º-{�lj�����ئjW����E���r��n��Z��Z��z+,_��C��q����h�f�{����z���Y.t�K2�צ�8^�yr��.x�Z��r�����v+-��m��ߕ�!��i�ج��z�k�x��Z�)�'-�����ax0
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��y�azǧ������د�ܬz�b�"��^�x��W����������v'\jYC���a{+.����m�֤z�^r�h�)���0��m��+y��~)mz��y��y�➙Zq���Z�؝��p����^���y�%��)��h���v�^��_��j��k*/z����w��xP"�����~)������ޗk^r�e謲Ƣv�Z��(�Wg�۬z�^�X�z���{a{�E�0��Z��ߊ[^���jح��'�+�y��
�zw���@�����8^�؝��^ƙZ�x�u�Z�\!�+b�z-��,��^�a�y"��!��]�n�Hv���y���b��ߊ[^��-�(����")��)���Z�����춊l��ߊ[^�
.���~)��8^��^��,�&�ܢ����V�y����������K�4�ǧ��ۺ�!j��i�ǭ���z{(����Z��!j����j�Z�쨹��jدz���W�j���w�N���)�v��q���ǫ���j[aq������(�x-�ƥ�g�i�0��Z��n�*'�����)�{���jsC~)mz�֊Yly�!j�a{+.�������jwh�k�n�X���'�T�
------------------------------
From: Michael Turano <turano@xxxxxxxxx>
Subject: [optimal] Re: Zeiss FF450 Plus flash/expopsure question
Date: Tue, 21 May 2013 18:31:44 -0400
That being said you could put your own ND filter in the filter holder down on
the camera body itself and see if it works (I think it would nock down the
exposure for sure). Just make sure you secure it you don't want it falling into
the machine.
I do agree that the manufacturer of the digital system should be able to tune
the sensitivity or add a filter at the sensor level. A flash level of 1
shouldn't blow out a test eye.
FYI I also work for Zeiss.
Mike
Michael R. Turano, Jr., CRA, OCT-C
Imaging Specialist
C 917.826.9506
F 917.591.1841
turano@xxxxxxxxx
Sent from my iPhone
On May 21, 2013, at 5:12 PM, kevinlangton@xxxxxxxxx wrote:
> Group
>
> There is no ND slider for the FF-450 on the lower port. Fernando did you
contact Merge / OIS to have the gain lowered on the digital sensor? The flash
output should be able to give you an well exposed image if the sensor is
properly set. Most digital imaging manufactures calibrate the sensor on sight
to
"marry" it to the retinal camera.
>
> Regards
>
> Kevin
>
> FYI I do work for Zeiss.
> Sent from my Verizon Wireless BlackBerry
> From: Noelle Pensec <npensec@xxxxxxxxx>
> Sender: optimal-bounce@xxxxxxxxxxxxx
> Date: Tue, 21 May 2013 17:05:36 -0400
> To: <optimal@xxxxxxxxxxxxx>
> ReplyTo: optimal@xxxxxxxxxxxxx
> Subject: [optimal] Re: Zeiss FF450 Plus flash/expopsure question
>
> From time to time we use an ND filter in the slider slot. On our FF-450 plus,
redfree images are often overexposed on the lowest flash setting for patients
with blonde retinas and reflective pathology. The filter was purchased directly
from Zeiss...
>
> On May 21, 2013 4:59 PM, "Fernando Corrada" <fcorrada@xxxxxxxxxxx> wrote:
>> Hi fellow Optimalers.
>>
>> Recently we purchased a new Zeiss FF-450 Plus IR camera to image with a
Merge/OIS WS5000 system. The only issue I have encountered is that the flash
output is quite strong for taking pictures of the DARC test eye. I am using the
lowest flash setting on the FF450 (1) and an ISO of 1oo on the sensor.
>> I am curious about how other people have solved this issue. ND filter on the
WS5000 sensor or on the FF450 filter slider? Changed the sensor sensitivity
settings in the ini files? Or.....?
>>
>> I did call DARC and they suggested to take the color images with the green
filter (red free) in place but that did not work either. The colors photos and
the red frees are way overexposed. The FA images are fine.
>>
>> A level 2 tech at Zeiss said that I could not use the slider filter on the
FF450 with an ND filter. That it is only used for green filters & FA filters.
They did not explain in detail why it is not possible. I think it should work
but I do not have a gelatin ND filter to try it out. I imagine that a 0.9 (3
stops) ND filter would be fine. The other possibilty is to place an ND filter
in
front of the WS5000 sensor but I hate to expose the sensor to dust and whatnot.
What have you creative people have done? Thank you in advance.
>>
>> Merge Healthcare/OIS is going to call me back with a solution which I think
involves an ND filter. Will see what they suggest.
>>
>> Fernando B. Corrada
>> Burlington, VT
------------------------------
Date: Tue, 21 May 2013 20:20:13 -0400
Subject: [optimal] Re: Zeiss FF450 Plus flash/expopsure question
From: Marshall Tyler <marshalletyler@xxxxxxxxx>
Can you pull the flash sync cable and just use the viewing light??
Marshall
On Tue, May 21, 2013 at 6:31 PM, Michael Turano <turano@xxxxxxxxx> wrote:
> That being said you could put your own ND filter in the filter holder down
> on the camera body itself and see if it works (I think it would nock down
> the exposure for sure). Just make sure you secure it you don't want it
> falling into the machine.
>
> I do agree that the manufacturer of the digital system should be able to
> tune the sensitivity or add a filter at the sensor level. A flash level of
> 1 shouldn't blow out a test eye.
>
> FYI I also work for Zeiss.
>
> Mike
>
> Michael R. Turano, Jr., CRA, OCT-C
>
> Imaging Specialist
>
> C 917.826.9506
> F 917.591.1841
>
> turano@xxxxxxxxx
>
> Sent from my iPhone
>
> On May 21, 2013, at 5:12 PM, kevinlangton@xxxxxxxxx wrote:
>
> Group
>
> There is no ND slider for the FF-450 on the lower port. Fernando did you
> contact Merge / OIS to have the gain lowered on the digital sensor? The
> flash output should be able to give you an well exposed image if the sensor
> is properly set. Most digital imaging manufactures calibrate the sensor on
> sight to "marry" it to the retinal camera.
>
> Regards
>
> Kevin
>
> FYI I do work for Zeiss.
> Sent from my Verizon Wireless BlackBerry
> ------------------------------
> *From: * Noelle Pensec <npensec@xxxxxxxxx>
> *Sender: * optimal-bounce@xxxxxxxxxxxxx
> *Date: *Tue, 21 May 2013 17:05:36 -0400
> *To: *<optimal@xxxxxxxxxxxxx>
> *ReplyTo: * optimal@xxxxxxxxxxxxx
> *Subject: *[optimal] Re: Zeiss FF450 Plus flash/expopsure question
>
> From time to time we use an ND filter in the slider slot. On our FF-450
> plus, redfree images are often overexposed on the lowest flash setting for
> patients with blonde retinas and reflective pathology. The filter was
> purchased directly from Zeiss...
> On May 21, 2013 4:59 PM, "Fernando Corrada" <fcorrada@xxxxxxxxxxx> wrote:
>
>> Hi fellow Optimalers.
>>
>> Recently we purchased a new Zeiss FF-450 Plus IR camera to image with
>> a Merge/OIS WS5000 system. The only issue I have encountered is that the
>> flash output is quite strong for taking pictures of the DARC test eye. I am
>> using the lowest flash setting on the FF450 (1) and an ISO of 1oo on the
>> sensor.
>> I am curious about how other people have solved this issue. ND filter on
>> the WS5000 sensor or on the FF450 filter slider? Changed the sensor
>> sensitivity settings in the ini files? Or.....?
>>
>> I did call DARC and they suggested to take the color images with the
>> green filter (red free) in place but that did not work either. The colors
>> photos and the red frees are way overexposed. The FA images are fine.
>>
>> A level 2 tech at Zeiss said that I could not use the slider filter on
>> the FF450 with an ND filter. That it is only used for green filters & FA
>> filters. They did not explain in detail why it is not possible. I think it
>> should work but I do not have a gelatin ND filter to try it out. I imagine
>> that a 0.9 (3 stops) ND filter would be fine. The other possibilty is to
>> place an ND filter in front of the WS5000 sensor but I hate to expose the
>> sensor to dust and whatnot. What have you creative people have done? Thank
>> you in advance.
>>
>> Merge Healthcare/OIS is going to call me back with a solution which I
>> think involves an ND filter. Will see what they suggest.
>>
>> Fernando B. Corrada
>> Burlington, VT
>>
>
--
Thank you,
*Marshall*
Marshall E Tyler
sv *Silk*
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End of optimal Digest V4 #97
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