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Undesired aberration, artistic shooters
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PostPosted: Mon May 13, 2013 3:35 am    Post subject: Reply with quote
zelda_n64 wrote:
Laurentiu Cristofor, this thread is based on the
Quote:
what is an undesired abberation to a lens designer is actually a useful feature to an artistic shooter
as mentioned by iangreenhalgh1 in the thread I created about the Welmy 28mm 2.5:


I see. So the softness is produced by spherical aberration and that extends the aberration term to two of the four effects mentioned.

Quote:
An aberration is something that deviates from the normal way


Yes, but a soft lens is always soft and some lenses were designed to be soft. Also the bokeh of some lenses derives from their design, rather than being an unintended effect. For example: would a mirror lens donut bokeh qualify as aberrant?

Anyway, since you specifically mentioned flare and glow as acceptable examples of aberrations, here are a couple of images:

Flare (Tokina RMC 24/2.Cool:


http://www.flickr.com/photos/laurentiucristofor/5201991019/

Glow (Jupiter 9 85/2 M42):


http://www.flickr.com/photos/laurentiucristofor/5231801091/


PostPosted: Mon May 13, 2013 5:57 am    Post subject: Reply with quote
Laurentiu Cristofor, 2 very nice images. that flare is very impressive.

I don't think my 28mm 2.5 lens was meant to be made soft/glow and there are no indications or scale anywhere on the lens to imply that it is a standard soft focus 28mm lens.

If all mirror lens produce the same style bokeh, then no it wouldn't be wise to post here, if however the mirror lens produces a bokeh that due to a fault in the production of the lens produces a non-standard bokeh then yes, please post.

People do know how a particular brand/size/type of lens will render a photograph and if they don't there are plenty of descriptions & examples on the web. When I purchased this lens, I had no idea f what or how it would render photographs. I expected it to be as my other 28mm lens albeit slightly faster.

I cannot find any information on or about the Welmy. it does perform completely different to all my other lenses and none of them produce any form of glow, and I have tried.

Should the title of this thread be changed to desired aberration or something else, any thoughts would be good.


PostPosted: Sun May 19, 2013 8:35 pm    Post subject: Reply with quote
Sunday May 19 2013, I purchased a Hoya multi-vision adapter with a 55mm thread, I only purchased this for 40 pence ($0.61) because it will fit my Welmy 28mm 2.5, which can only mean loads of abstract fun.

About half an hour ago, I went into the garden and took some shots - the light wasn't amazing but I did use only the natural light that was available to me, no artificial light source was used.

All shots are wide open at about 1/50, these have been resized and the levels have been auto adjusted in my Serif program.





The next 2 have been cropped a little:




Should this lens really be used like this? I don't know, but I am impressed with the unusual effect and can't wait to try it out properly.


PostPosted: Mon May 20, 2013 9:28 am    Post subject: Reply with quote
zelda_n64 wrote:
Sunday May 19 2013, I purchased a Hoya multi-vision adapter with a 55mm thread, I only purchased this for 40 pence ($0.61) because it will fit my Welmy 28mm 2.5, which can only mean loads of abstract fun.

Should this lens really be used like this? I don't know, but I am impressed with the unusual effect and can't wait to try it out properly.


Great buy there - I love the retro 70s style optical effect. Wonder what would happen if you mounted two of these filters on the lens!
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