[optimal] Re: Photographing techniques using a Zeiss 2x magnification lens
- From: aissa9400@xxxxxxxxx
- To: "optimal@xxxxxxxxxxxxx" <optimal@xxxxxxxxxxxxx>
- Date: Sun, 10 Aug 2014 10:00:26 -0400
James,
I figured that. I'm going to try everyone's suggestions this week and hopefully
my eyes will cooperate.
A.D. sent by iPhone
> On Aug 10, 2014, at 9:00 AM, JamesStrong <jamesdstrong@xxxxxxxxx> wrote:
>
> FWIW - changing settings on the camera body will have no affect on
> focus/parfocality - it's an optics issues.
>
> j-
>
>
>> On Sat, Aug 9, 2014 at 11:22 AM, Eric Kegley <ekegley@xxxxxxxxxxxxxxxxx>
>> wrote:
>> 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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