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.70mm Replacement objective

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7 replies to this topic

#1 BobW55

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Posted 22 February 2020 - 10:21 PM

So I have one of these Astromania 70mm guide scopes.

Nice scope till I dropped it.

61JUMnmv0oL._SL1500_.jpg

 

Anyone know if it is possible to order a replacement objective?

 

It is only cracked along the edge, still works, but gives a bunch of refraction spikes on really bright stars.



#2 OldManSky

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Posted 23 February 2020 - 10:55 AM

I don't know of any way to order just an objective for it.

You might try gently removing the objective, and using a black sharpie to blacken the crack...or even make a small aperture mask out of plastic for the front, that covers the crack.  No more diffraction spikes, and it will work fine.



#3 BobW55

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Posted 23 February 2020 - 01:32 PM

I don't know of any way to order just an objective for it.

You might try gently removing the objective, and using a black sharpie to blacken the crack...or even make a small aperture mask out of plastic for the front, that covers the crack.  No more diffraction spikes, and it will work fine.

Didn't think about just masking it off.... will give that a go.  thanks



#4 BobW55

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Posted 23 February 2020 - 01:41 PM

Here is what it looks like.

 

crack2.jpg



#5 Redbetter

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Posted 23 February 2020 - 05:01 PM

Probably the same optics as in the Celestron 70mm Travel Scope.  Both are 400mm so I would expect an objective swap to be easy.  These go on sale cheaply at times.  You can find used ones on Ebay for less.


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#6 BobW55

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Posted 23 February 2020 - 10:15 PM

Contacted Astromania Optics,

They are willing to sell a new Objective lens assembly for $45.   Cheaper than buying a new scope.

I masked off the damaged area for now.


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#7 mattyfatz

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Posted 24 February 2020 - 09:03 AM

There are a few options. You need to find the FL. You're also going to need a spanner wrench for the retaining ring:

 

 

 

surplus shed 

 

 

 

  CN classifieds under ATM



#8 BobW55

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Posted 24 February 2020 - 10:18 AM

I just went and ordered direct from the vendor.

 

https://astromaniaop...cope-p0399.html

 

Thanks for all the replies




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