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Wray Lustrar 4.5/6 inch
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PostPosted: Sat Apr 05, 2008 11:28 am    Post subject: Wray Lustrar 4.5/6 inch Reply with quote
I finally got around testing the Lustrar, probably a dialyt type lens from 1921, i.e. 4 elements in 4 groups, which means low contrast due to veiling glare and maybe half a stop losses, similar to a Cooke Aviar.



I've only tested the lens at the full f/4.5 aperture, and it seems to perform reasonably well - for a 9.99 GBP lens. Here are a couple of examples, the contrast has been adjusted:





However, like with the Aviar fully open, the bokeh can be rather distractive, and I must later on test the lens also stopped down. Here is a model example of the bokeh:



More photos at http://galactinus.net/vilva/retro/eos350d_lustrar.html

Veijo


PostPosted: Sat Apr 05, 2008 12:01 pm    Post subject: Reply with quote
nice lens with perfect colors and quite good wide open
#1 is very nice
I like the bokeh on #3 but not the left border of #2 where the cord is fuzzy


PostPosted: Sat Apr 05, 2008 1:06 pm    Post subject: Reply with quote
poilu wrote:
I like the bokeh on #3


Well, it seems the perceived quality of bokeh is very much a matter of taste Smile That's the kind of bokeh I try to avoid at all costs because in a more complex scene it has an effect like this:



The upper part is Lustrar wide open, the lower part is Aviar wide open. The next pair is Uno f/7.7 wide open and Aviar at f/8, this is what I'm after:



Here there are no bright edge highlights, especially the Aviar is very clean in this respect. I'd like to find a lens which would be sharp but still behave like this also at larger apertures.

Veijo


PostPosted: Sat Apr 05, 2008 1:57 pm    Post subject: Reply with quote
I'm fully with you Veijo,

that bottom shots look much better in term of bokeh, the top ones irritates the viewer (me) a bit.

I remember some tests I did some time ago with that lens, a dialyte type, which were nice, but I have to re-examine that first.

http://www.macrolenses.de/ml_detail_sl.php?ObjektiveNr=335

Cheers,


PostPosted: Sat Apr 05, 2008 3:41 pm    Post subject: Reply with quote
That's a very good example to show the different bokeh styles.


PostPosted: Sun Apr 06, 2008 6:11 am    Post subject: Reply with quote
Im afraid I like the former bokeh too, as Ive yet to learn to make bokeh anyways. Embarassed So that figures why I like the lesser proper bokeh... lack of expertise. Bokeh only happens to me by accident. But these bokeh are as oil paintings to me. Shocked Surprised


PostPosted: Sun Apr 06, 2008 8:49 am    Post subject: Reply with quote
me too a newbee as to how to achieve it..
But sunday morning learned a valuable lesson here..What the Heck is Bokeh?


PostPosted: Sun Apr 06, 2008 9:08 am    Post subject: Reply with quote
Welcome Bruce! Nice to have artistic eyes with us Very Happy

Nice link dakoo
R. W. Denney, Jr. wrote:
The inexpensive Zeiss Jena Sonnars provide a lot of bokeh quality for the buck
Specular highlights and other out-of-focus bright spots don't tell the whole bokeh story
Bokeh is subjective, but it is not an illusion
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