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Black fingers on my eyepiece

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#1 Sandytoes1963

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Posted 24 January 2013 - 07:13 PM

While I was looking at the near full moon tonight I noticed only what I would describe as black fingers growing across my field of view. The longer I say there the longer they became. Any ideas?
When I loosened and rotated my eyepiece the black stayed in the same spot and reappeared when I switched eyepieces.

#2 norton67

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Posted 24 January 2013 - 07:17 PM

Where you looking through tree branches?

#3 Sandytoes1963

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Posted 24 January 2013 - 07:24 PM

No, I just turned my cooling fan on to see if that helps.

#4 Tim L

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Posted 24 January 2013 - 07:32 PM

Are you using a reflector at low power? The moon's brightness can make your pupil constrict so that the secondary obstruction takes up a large portion of the light entering the eye. Back your eye away from the eyepiece and see if you can see the moon with a big black spot in the middle where your eye goes.

#5 Sandytoes1963

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Posted 24 January 2013 - 07:39 PM

Okay I'm a idiot, you were right I was looking through some leafs that I didn't see in the dark.....Sorry ( :
Thanks for the help

#6 norton67

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Posted 24 January 2013 - 07:43 PM

I have done the samething.

#7 skinnyonce

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Posted 24 January 2013 - 07:46 PM


Next time just shake the tree harder

Okay I'm a idiot, you were right I was looking through some leafs that I didn't see in the dark.....Sorry ( :
Thanks for the help



#8 herrointment

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Posted 24 January 2013 - 07:53 PM

Those issues baffle and frighten the best of us.

Repeatedly in my case.

#9 Tony Flanders

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Posted 24 January 2013 - 07:54 PM

Okay I'm a idiot, you were right I was looking through some leafs that I didn't see in the dark.


Yeah, I thought it sounded familiar. I can't tell you how many times I've done that.

Some of the most amazing dark lanes in the Milky Way turned out to be trees ...

#10 GeneT

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Posted 25 January 2013 - 07:09 PM

Next time just shake the tree harder

Okay I'm a idiot, you were right I was looking through some leafs that I didn't see in the dark.....Sorry ( : Thanks for the help


I recommend moving the telescope out and away from being under any trees. All trees that I know of spit sap. It can speckle your mirror, and almost be unnoticed. If you get sap on your mirror, you should clean it immediately after your viewing session.

#11 Sandytoes1963

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Posted 26 January 2013 - 08:39 PM

I had a excellent viewing tonight and did so even without that pesky tree. lol






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