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A chip on the bino viewer prism?

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#1 BCNGreyCat

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Posted 12 October 2013 - 07:22 PM

When I switched eyepieces from my Baader Mk V Bino tonight, I suddenly found there seemed to be a small chip on the prism, if looking through the left side eyepiece holder.

See the attached photo, the place where the red arrow point to.

Is this normal? Does anyone see similar thing on their Baader Bino as well?

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#2 BCNGreyCat

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Posted 12 October 2013 - 07:23 PM

Here is a close up look.

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#3 GlennLeDrew

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Posted 12 October 2013 - 10:11 PM

Yes, that is an edge chip; you can see its reflection. Its location most likely puts it outside the image-forming beam, and more over it is small. It will likely have no effect that you could see on the image.

With the BV installed in the scope, can you sight through it so as to have the chip superimposed on the objective? If not, it's definitely out of the image-forming light path for any part of the field.

#4 BCNGreyCat

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Posted 13 October 2013 - 02:31 PM

Double checked the BV in the scope at day time. Cannot notice it from 24mm Panoptics without using the 1.25x GPC. This should be the widest FOV. So, I guess the chip is not in the image light path.

#5 BCNGreyCat

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Posted 24 October 2013 - 04:34 PM

I sent the bino viewer to astro physics for inspection. They said

"Your binoviewer has been evaluated and there is no chip detected. Optical axis is free and clear with no defects of any kind. The notes indicate, “perhaps the customer saw a reflection from the head of a screw.” This binocular is found to be in perfect condition."

#6 BCNGreyCat

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Posted 24 October 2013 - 04:40 PM

Okay. Just want to double check with folks who have a Baader Mk V bino viewer. Do you guys see similar reflection of a "screw head" from the left side eyepiece holder of yours?

Any feedback will be appreciated!

#7 GlennLeDrew

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Posted 24 October 2013 - 05:13 PM

I'm surprised you sent the BV away for checking, after verifying yourself there was no defect in the optical path.






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