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The view through older Glass


farnz

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Super-Angulon 21 f.4 1951; M3, Kodak Portra 400

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M typ 240. Olympus  Zuiko Auto-T 1:3.5/135 bought about 1976. Cheap OM-L/M adapter. EVF focusing.

Focused on the yellow sculpture, f8, 1/500sec

I don't understand the fringing - it's not purple green but a solid red - best seen on the tree trunk against the yellow object. Can someone please name that aberation?

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Zoom to the red fringe

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... I don't understand the fringing - it's not purple green but a solid red - best seen on the tree trunk against the yellow object. Can someone please name that aberation?

 

My guess would be that it's a sensor aberration called "blooming" rather than a lens aberration.  I

 

When the photodiodes (sensels) in the sensor become oversaturated with light then they can spill over into surrounding sensels and cause this type of reddening.  The picture doesn't appear overexposed so you might not expect to see blooming but it's only happening at the brightest parts of the yellow bridge where it's intersected by the tree and the pole.   I expect that only one of the RGB channels has been oversaturated by the yellow (which is typically the hardest colour for digital sensors to reproduce) and since the levels in the tree and pole sensels are comparatively low the excess charge/energy has spilled into them and shown up as the red discolouration.

 

My suspicion is that the picture's histogram would show a few very thin but high lines on the right hand side.

 

Pete.

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More aberration; this time typical flare from the 35/1.4 Summilux pre-asph Mk2.

 

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More lens aberration: the 'glow' around the fluorescent orange bench.  35/1.4 Summilux pre-asph Mk2 with M10.  

 

I like this lens very much for what it offers under certain conditions even though it probably wouldn't please the purists.  :D

 

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Piesker Picon 135 mm f=3.5

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and stopped down to 5.6

both on M240 with EVF as the Picon is uncoupled for Leica Standard

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My T w/ Summilux 75 and R/M, M/TL adapter, Visoflex,

taken by M-P with the Summilux 50, V2 non-ASPH.

 

 

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Summaron 35 f2.8. M9.

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MP, SOMNI, Agfa Vista


"scan" with Monochrom, Beoon, Focotar


 


 


 


.

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one again Leica SL Voigtländer Apo Lanthar 125mm (M42) at its main work.... Macro (no Crop)

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BlackDoc, beautiful photo and wonderful use of your Apo Lanthar 125mm. How do you get the insect to stay around long enough for you to make photos? Or is it a matter of seconds to shoot, before it takes off again?

Lex

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More lens aberration: the 'glow' around the fluorescent orange bench.  35/1.4 Summilux pre-asph Mk2 with M10.  

 

I like this lens very much for what it offers under certain conditions even though it probably wouldn't please the purists.  :D

 

attachicon.gifOrange bench.jpg

 

Hello Pete,

 

Nice photo.

 

What is the cause of the "glow"?

 

Also, what aperture please?

 

Best Regards,

 

Michael

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Hi, Michael,

 

Wide open and I suspect it's a result of under-corrected Spherical Aberration but others might correct me.  The lens shows plenty of coma in other pictures.  This lens is well known for producing this type of ethereal glow when shot wide open in the presence of a strong light source and is partly what attracted me to it (again).

 

Pete.

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BlackDoc, beautiful photo and wonderful use of your Apo Lanthar 125mm. How do you get the insect to stay around long enough for you to make photos? Or is it a matter of seconds to shoot, before it takes off again?

Lex

Thanks, i had about 2 minutes to take this photo, this wood-"eating" wasp was sitting ( and moving just about 10 cm) on an old stable. So there were more difficulties to get the moving wasp sharp by working free handed, but two or three of 20 pictures worked...
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I finally modified my Summilux 35 from 1966 for use on my M9. It is a transitional model, V1 by serial number but has all the features of V2 and is the one with the auxiliary finder for the M3. This actually suits me quite well on the M9, because I can see the frame lines even with glasses on.

 

I love the softness wide open and of course the character of the out of focus. And I like how the M9 renders foliage.

 

ISO 80 F1.4 1/2000s (conv. from DNG)

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ISO 160 F2 1/1000s (in-camera jpeg)

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