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Perl
Joined: 03 Oct 2006
Posts: 129
Location: Sweden
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 Posted: Mon Jul 09, 2012 3:15 am Post subject: Zeiss Luminar Zoom 2.5 - 5 Question |
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Hi !
Wonder about a Zeiss Luminar Zoom 2.5 - 5 i buy some time ago
Then i look in it from back to front - The image is blurry
but if i look from front its sharp
If i take out the first lens at back - the image are sharp
but smaler ( 1/2 Size aprox )
Anyone who have this lens and know how it shall preform
and how the lenses shall sit in it ?
or is this normal for this lens ( do it requre belows and extra lens to
work ) ?
Regards
Pär Lundqvist
Sweden
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Harold Gough
Joined: 09 Mar 2008
Posts: 5732
Location: Reading, Berkshire, England
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| Posted: Mon Jul 09, 2012 4:38 am Post subject: Re: Zeiss Luminar Zoom 2.5 - 5 Question |
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| Perl wrote: | Then i look in it from back to front - The image is blurry
but if i look from front its sharp |
Are you looking at a close object or into the distance?
Harold
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Happiness is having the right adapter.
My manual flash setup for high magnification:
http://www.photomacrography.net/forum/viewtopic.php?p=117843#117843 |
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Perl
Joined: 03 Oct 2006
Posts: 129
Location: Sweden
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| Posted: Mon Jul 09, 2012 6:21 am Post subject: |
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Hi Harold !
Both at Close Objects and at Distance
At Distance - No Focus at all
It get to fucus then there are only mm
to the objects - shall it be so ?
Best Regards
Pär
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Harold Gough
Joined: 09 Mar 2008
Posts: 5732
Location: Reading, Berkshire, England
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| Posted: Mon Jul 09, 2012 6:46 am Post subject: |
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Pär,
I am not familiar with the lens but understand it to be a microscope lens. You will need to view through it accordingly.
I mainly asked for clarification for those with appropriate knowledge to be able to comment.
Harold
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Happiness is having the right adapter.
My manual flash setup for high magnification:
http://www.photomacrography.net/forum/viewtopic.php?p=117843#117843 |
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Perl
Joined: 03 Oct 2006
Posts: 129
Location: Sweden
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| Posted: Mon Jul 09, 2012 8:03 am Post subject: |
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Hi Harold !
Just wonder if anyone other in this forum
have same lens and can tell how its expected to work
Best Regards
Pär
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Harold Gough
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Perl
Joined: 03 Oct 2006
Posts: 129
Location: Sweden
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| Posted: Mon Jul 09, 2012 10:30 am Post subject: |
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Hi Harold !
Yes thats make things - littel clearer
Thanks for helping me out
Best Regards
Pär
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Harold Gough
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Perl
Joined: 03 Oct 2006
Posts: 129
Location: Sweden
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| Posted: Mon Jul 09, 2012 3:16 pm Post subject: |
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Hi Harald !
Many Thanks to get me on right direction
Yes we hoe some that have the lens can
give some info
Best Regards
From Sweden
Pär
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Charles Krebs
Joined: 01 Aug 2006
Posts: 4072
Location: Issaquah, WA USA
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Craig Gerard
Joined: 01 May 2010
Posts: 2600
Location: Australia
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| Posted: Mon Jul 09, 2012 11:04 pm Post subject: |
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| Quote: | You might also to try to make contact with this gentleman. He has posted here once or twice (some time ago, under the name "fluor_doublet") and apparently has quite a collection of interesting optics, including the Luminar zoom:
http://www.flickr.com/photos/fluor_doublet/4139899303/ |
Ryoji Tanaka aka fluor_doublet also has a blog, but you will need to translate because it is in Japanese.
http://d.hatena.ne.jp/doublet/
Craig
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Perl
Joined: 03 Oct 2006
Posts: 129
Location: Sweden
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| Posted: Tue Jul 10, 2012 2:39 am Post subject: |
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Hi Charles & Craig !
Yes this lens are a strange to me
I have contacted thy guy i Japan
it would be very intressting to se the answer
My closes guess now is that the lens demand correction optics to work
Anyway - Thanks for info that i hope solve this matter
Best Regards
From Sweden
Pär
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Craig Gerard
Joined: 01 May 2010
Posts: 2600
Location: Australia
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| Posted: Tue Jul 10, 2012 2:54 am Post subject: |
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Pär,
fluor_doublet did log onto the forum after I sent him a PM, but he obviously did not leave a comment on this forum regarding this discussion. He may still be preparing to do so.
The other person who may know something about your lens is Klaus Schmitt.
Craig
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enricosavazzi
Joined: 21 Nov 2009
Posts: 485
Location: Uppsala, Sweden
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| Posted: Tue Jul 10, 2012 3:49 am Post subject: |
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Hi Perl,
I did not test the Luminar Zoom myself, but I know it is designed mainly for use on 160 mm finite microscope systems. A 150 mm distance to the sensor will provide the nominal magnification.
I think I remember reading from Klaus that he regards the Luminar Zoom as not useful in photomacrography, but not the specific reason. I have seen a few picture samples taken with this lens and they do not look any worse than the IQ from other Luminars. The zoom ratio is not so big, however.
For a while I was tempted getting one in order to use the zoom instead of changing the extension (zooming is faster when you have to take a lot of pictures at different magnifications), but this reason went away once I got better/more comfortable photomacrographic zooms, including the Mitutoyo FS-60 and the Zeiss Tessovar.
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Perl
Joined: 03 Oct 2006
Posts: 129
Location: Sweden
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| Posted: Tue Jul 10, 2012 3:56 am Post subject: |
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Hi enricosavazzi !
Thats make sense - i belive it need Corecting Optics
to do the work right
Well i guess i sell it becuce i have no Zeiss Microscope
to use it on
Best Rägards
Pär Lundqvist
Sweden
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