Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

Started Oct 16, 2011 | Discussions
monsun New Member • Posts: 8
Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

Hello forum,

Can someone please explain what causes those cracks on bokeh lights.

CarVac
CarVac Senior Member • Posts: 1,246
Re: Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

It's probably a minor imperfection in the lens elements. Perhaps in the bonding between glass and plastic in the hybrid aspherical element(s)?

Have you tried the flashlight test? It may reveal the problem causing the imperfections in the bokeh.

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Phoenix Jackson Junior Member • Posts: 40
Re: Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

The new Samyang lenses happen to have wooly bokeh. It's one of the things I read from reviews but I don't know if it bothers me or not. I get wooly bokeh at times but not as cracked-looking as these.

OP monsun New Member • Posts: 8
Re: Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

Thanks for responses.

Lens seems flawless on the eye. Perhaps it's nikon-nex adapter. Though, there is no problem with nikkor 50mm 1.8. and that same adapter.

Are faults like this covered by guarantee?

Damovich Senior Member • Posts: 1,141
Re: Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

To me the "cracks" look like the same pattern fungi usually creates. Please look over here for a bit of information about it: http://www.chem.helsinki.fi/~toomas/photo/fungus/

H Alward Regular Member • Posts: 127
Re: Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

Perhaps bonding. See this in bad runs of much more sophisticated coatings, problems with cleaning prior to coating chamber.

th3_n3wb13 Senior Member • Posts: 1,681
Re: Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

if I had that lens and I saw it, I would complain and return it as soon as possible

ZoneV Regular Member • Posts: 209
Re: Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

That looks bad!

Probably is it this wolly bokeh, could probably caused by an aspherical element. Normal I know onion rings in bokeh of aspheric lenses - don´t like that. Normal wolly bokeh is bad, but yours really look like a crack somewhere. Probably fungus - or a crack in the plastic of the hybrid aspherical surface?

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yvawoo Junior Member • Posts: 32
Re: Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

Looks very unique!

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WildSammy Senior Member • Posts: 1,070
Re: Samyang 85mm 1.4 USM - strange cracks on my bokeh lights

It looks like fungus is developing inside the lens.. judging from the bokeh somewhere near the rear element. Check it.
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