[optimal] Re: Photographing techniques using a Zeiss 2x magnification lens
- From: Eric Kegley <ekegley@xxxxxxxxxxxxxxxxx>
- To: "optimal@xxxxxxxxxxxxx" <optimal@xxxxxxxxxxxxx>
- Date: Sat, 9 Aug 2014 11:22:01 -0400
Because the mag is higher, it is very important that your image is as sharp as
possible trough the eyepiece. Also, you said something about the diopter
compensation wheel being as plus as possible. You shouldn't have to change
that unless your subject is very hyperopic. My advice would be to make sure
your reticle is very well focused and then focus carefully on the center of the
frame.
Thanks,
EK
Eric Kegley, CRA, COA
Director of Ophthalmic Imaging
6560 Fannin St., Suite 750
Houston, TX 77030
Main 713 524-3434
Sent from my iPhone
> On Aug 9, 2014, at 9:31 AM, Marshall Tyler <marshalletyler@xxxxxxxxx> wrote:
>
> Are the eyepiece sharp at the same time as the image is sharp?
> Try a test target of a ruler or sm as 'll printed text which you tilt
> relative to the plane of focus. It should be sharp in the center. If sharp
> closer or further away you have a focusing problem. If is not sharp anywhere
> you may have a lens/system problem.
>
> Thank you,
> Marshall
> Marshall E Tyler
>
>> On Aug 8, 2014 11:09 PM, <aissa9400@xxxxxxxxx> wrote:
>> Thanks Jeremy for the eye opener. I hope it's not a waste $ for the lens.
>>
>> I've changed the compensation lens to the highest plus mag on the FF4 and
>> turn the dial all the way. The image looked clearer but no cigar. I'm going
>> to try and change the setting on the 6D itself to macro, not sure what will
>> happen and if it will even let me change the setting while it's connected to
>> the PC.
>>
>> I would like more input on my thoughts if possible.
>>
>> Aissa
>>
>> A.D. sent by iPhone
>>
>>
>>> On Aug 8, 2014, at 10:16 PM, Jeremy Pantell <jpantell@xxxxxxxxxxxxx> wrote:
>>>
>>> HI AISSA! I guess the question is whether the Canon 6D/Zeiss 2X adapter
>>> will "parfocal" with the Zeiss eyepiece. I would focus off your monitor
>>> while trying to come up with a better solution. When using the 2X with a
>>> film setup there was no particular magic about it. Just focus very
>>> carefully and compose within the viewfinder grid. Good patients would
>>> yield very nice results.
>>>
>>> sincerely, jeremy p. pantell bfa cra
>>>
>>>
>>> On Friday, August 8, 2014 4:06 PM, Aissa Dirawatun <aissa9400@xxxxxxxxx>
>>> wrote:
>>>
>>>
>>> Hello everyone,
>>>
>>> Our practice purchased a Zeiss 2x lens adapter for our FF4 (w/ Canon 6D)
>>> camera to use for ONH pictures. I'm having trouble focusing the image. I
>>> need your advice.
>>>
>>> Thank you!
>>>
>>> Aissa Dirawatun, COA
>>> Ophthalmic Photographer/Technician
>>> Virginia Retina Center
>>> 20 Rock Pointe Lane Suite 20
>>> Warrenton, VA 20155
>>>
>>> --
>>> "Reading makes immigrants of us all. It takes us away from home, but more
>>> important, it finds homes for us everywhere." ~ Jean Rhys 1890-1979
>>>
>>>
>>>
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