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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 02 Jul 2015 (Thursday) 05:28
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How much parabolic are parabolic light modifiers ...

 
DetlefG
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Mar 25, 2016 14:39 |  #61

Hi,

thanks for the link for the calculation tool.

regarding my article. it is still in my list to write it in english.

Detlef




  
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180q
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Post edited over 3 years ago by 180q.
     
Mar 26, 2016 11:35 |  #62

Has anyone seen these? I was always under the impression that a parabolic was meant to be round in shape, with numerous spines/rods. These appear to be more of an octa shape, much like the deep octa. The various sizing options are interesting, however. Thoughts?

http://www.parabolixli​ght.com/ (external link)

-Chad




  
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feeda
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Mar 26, 2016 13:17 |  #63

180q wrote in post #17949453 (external link)
Has anyone seen these? I was always under the impression that a parabolic was meant to be round in shape, with numerous spines/rods. These appear to be more of an octa shape, much like the deep octa. The various sizing options are interesting, however. Thoughts?

http://www.parabolixli​ght.com/ (external link)

-Chad

Interesting. I love how the speedlight version costs more than the Profoto version :lol:




  
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JoakimD
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Mar 26, 2016 14:30 |  #64

180q wrote in post #17949453 (external link)
Has anyone seen these? I was always under the impression that a parabolic was meant to be round in shape, with numerous spines/rods. These appear to be more of an octa shape, much like the deep octa. The various sizing options are interesting, however. Thoughts?

http://www.parabolixli​ght.com/ (external link)

-Chad

The adapters are an exact copy of Broncolors adapters. They don't have a round shape to them since they have too few rods, but they look interesting.

The defocused images they have don't really show that they create a ring light when defocused like briese/broncolor however.


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PhilF
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Post edited over 3 years ago by PhilF. (2 edits in all)
     
Mar 26, 2016 16:43 |  #65

180q wrote in post #17949453 (external link)
Has anyone seen these? I was always under the impression that a parabolic was meant to be round in shape, with numerous spines/rods. These appear to be more of an octa shape, much like the deep octa. The various sizing options are interesting, however. Thoughts?

http://www.parabolixli​ght.com/ (external link)

-Chad

niiiiiiice.

Now ...question is...who wants to jump in first and do a review.


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nixland
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Mar 26, 2016 19:57 as a reply to  @ 180q's post |  #66

Thats cool. Thanks for the info.

Yes, the shape is parabolic.




  
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nixland
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Mar 26, 2016 22:24 as a reply to  @ nixland's post |  #67

But yes, the number of rod of that Parabolix para is too few to give a better parabolic output. But I am sure it will give more focus light than non para octabox




  
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calico
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Mar 27, 2016 11:01 |  #68

180q wrote in post #17949453 (external link)
Has anyone seen these? I was always under the impression that a parabolic was meant to be round in shape, with numerous spines/rods. These appear to be more of an octa shape, much like the deep octa. The various sizing options are interesting, however. Thoughts?

http://www.parabolixli​ght.com/ (external link)

-Chad

That's very interesting. Hopefully someone will review them soon.




  
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nixland
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Mar 31, 2016 19:54 |  #69

The test results of "ring light" effects from Rime Lite 180.

Top : my earlier test with the strobe head at 65cm/25.5 inch from the base, about 6 feet distance between front edge of the para to model's face.
The base of the para (speedrings) base is about 6 feet high aimed down at the model.

It's not quite pleasing imho. Looks harsh. It seems that the angle of the para axis is not in best position that the light from lower area was stronger than the upper area. See the catchlight.

Mid :
I did the second test several weeks after the previous test.
This time the distance between the para and the model was a bit farther a couple of inches.
And the distance of the strobe is 60cm/23.5 inch and the base position is a bit higher.
The result is more pleasing.

Bottom :
The same as the prevoius setup but this time the axis is paralel to the ground; the base position is at the same height as the model's head.
How do it looks? :)


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nixland
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Apr 09, 2016 08:05 |  #70

As we've seen in the early posts, the Rime Lite 180 rod curve is closer to parabolic curve compared to Aurora/Zeppelin.

That is if we use Zeppelin diameter size and depth to calculate the parabolic curve.

Since it deviates from parabolic curve, we can expect that the light from Zeppelin will scatter like in the second diagram.

But how if we assume that the Zeppelin is a smaller parabolic modifiers with "extended hood" like in the right diagram? :) I put the strobe head in the focus point of inner parabolic curve.

So the inner curve will give a more parallel light while the outer curve gives wrapped around light.

Well, I've done some quick test and you can see the results below. Not much differences between 2 strobe position in zeppelin. Both gives wrapping light.


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nixland
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Apr 09, 2016 09:01 |  #71

We can see the differences on the loop light. The 20cm focus position gives more wrapping (softer) light.


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Angmo
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Apr 09, 2016 12:11 |  #72

180q wrote in post #17949453 (external link)
Has anyone seen these? I was always under the impression that a parabolic was meant to be round in shape, with numerous spines/rods. These appear to be more of an octa shape, much like the deep octa. The various sizing options are interesting, however. Thoughts?

http://www.parabolixli​ght.com/ (external link)

-Chad

Seems to me with the Octa shape and so many flat surfaces, it really isn't a parabolic and only select photons reflecting off the center of each panel would be "para" in nature. The rest of the light will skip off elsewhere.


Nikons, Rolleiflexes, Elinchroms, Billinghams

  
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PhilF
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Apr 09, 2016 12:29 |  #73

nixland wrote in post #17956397 (external link)
The test results of "ring light" effects from Rime Lite 180.

Top : my earlier test with the strobe head at 65cm/25.5 inch from the base, about 6 feet distance between front edge of the para to model's face.
The base of the para (speedrings) base is about 6 feet high aimed down at the model.

It's not quite pleasing imho. Looks harsh. It seems that the angle of the para axis is not in best position that the light from lower area was stronger than the upper area. See the catchlight.

Mid :
I did the second test several weeks after the previous test.
This time the distance between the para and the model was a bit farther a couple of inches.
And the distance of the strobe is 60cm/23.5 inch and the base position is a bit higher.
The result is more pleasing.

Bottom :
The same as the prevoius setup but this time the axis is paralel to the ground; the base position is at the same height as the model's head.
How do it looks? :)
thumbnail
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forum: Flash and Studio Lighting

what strobe did you use ?


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nixland
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Apr 09, 2016 20:06 as a reply to  @ PhilF's post |  #74

Godox AD360.




  
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nixland
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Jun 24, 2016 18:32 |  #75

From latest test shot I did few days ago I had a couple of notes.
Since the interior surface of the para is not mirror-like, it is expected that the fall off (highlight to shadow) gradation will be softer. We can not do anything about this :)

Also there is a slight light leak or spill from the strobe. But mostly it won't matter because the area won't be on the frame anyway.

But still, the closer the rod curve to parabolic curve shape, the more focused light we will get, as seen in the second comparison shot.

Again, this is not about light quality, because the para on the right side gives me more beautiful wrapping light due to its deep "hood", but it is about light options, the left one can gives more focused light (if you need it) :)


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How much parabolic are parabolic light modifiers ...
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