Opinions on H&A Cushion

[stone-cold11]

I thought that is the side, not the corner? The sides are painted, but the corners are not, should have more leakage there.

 

[ChunkyCushionLover]

I thought that is the side, not the corner? The sides are painted, but the corners are not, should have more leakage there.

I thought that is the side, not the corner? The sides are painted, but the corners are not, should have more leakage there.

You don't need a thick girdle on the corners to get what I call "rabbit ears" that are capable of returning low angle light only.
I beleive the way the photograph was taken and the lack of low angle light has turned those areas into what appears to be leakage.
That is what makes stones with too much green perform poorly in some lighting conditions.

In this design its not a problem and is unavoidable, by definition the distance from centre to corner is longer than from centre to side so something has to give. In this case the LGF in the corners is longer, and the UGFs in the corners are shallower.

Here is the simulated ASET from the AGS report its the same on the corners and correlates well with the photographed images.

 

[ChunkyCushionLover]

Bump for SC.

 

[stone-cold11]

Thanks CCL.

Ya, maybe this is cut without leakage, seems like some has leakage some don't from the database on GOG, but I would like to see some leakage as a reference to make sure the scopes are position correctly.

 

[ChunkyCushionLover]

Thanks CCL.

Ya, maybe this is cut without leakage, seems like some has leakage some don't from the database on GOG, but I would like to see some leakage as a reference to make sure the scopes are position correctly.

You do raise a good point though, I played with the light ray tool in DC trying to get a non messy picture of which angle of light and hitting which pavilion facet(s) in what path could light that area of the crown.

Its just not easy to do for me, perhaps Karl K or Garry H could post it as I am not sure.