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Modifying a Celestron TravelScope 70 for Astrophotography Use

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#1 Eteny

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Posted 27 May 2024 - 08:15 PM

The Celestron Travel Scope 70 has a front lens diameter of 70 mm and a focal length of 400 mm. If mounted on a tracking mount, it produces good results in long exposure imaging. Note that the telescope showed signs of chromatic aberration. The focuser has been replaced with a focuser from a Vixen refractor. Rings and dovetail plate have been used to attach the telescope to a Meade LXD75 equatorial mount. I used an ASI 533MC to capture the images.

travelscope70-imaging-setup.jpg

 

travelscope_stacked.jpg

 

m8.jpg

 

m42_travelscope70.jpg

 

m45_travelscope70.jpg

Eteny

 


Edited by Eteny, 27 May 2024 - 11:27 PM.

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#2 BrianThePrimate

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Posted 27 May 2024 - 09:10 PM

The Celestron 70mm Travel Scope is not a bad little scope. I bought one for my young niece to introduce her to astronomy. For the price... around $100 US, the optics are quite good. Some aberration, but for the price not bad at all. I used it one year with my Nikon to capture a lunar eclipse. It did the job for what I needed. For a cheap option, it does just fine. 


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#3 krishnak

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Posted 28 May 2024 - 08:02 AM

Hi, very nice captures using the Celestron 70mm Travel Scope. I usually use my 50mm finderscope to capture the moon. Curious as to what causes the V shape intrusion in the star images as I see them in my finderscope images also. Thanks.


Edited by krishnak, 28 May 2024 - 08:03 AM.

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#4 Eteny

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Posted 28 May 2024 - 09:17 AM

Hi, very nice captures using the Celestron 70mm Travel Scope. I usually use my 50mm finderscope to capture the moon. Curious as to what causes the V shape intrusion in the star images as I see them in my finderscope images also. Thanks.

Thanks! The V-shaped intrusions are caused by the 3 aluminum foil spacers that separate the two lenses of the objective. The spacers are placed at the edge, 120 deg apart. If a ring spacer is used instead, the V-shaped intrusions should disappear.

 

Eteny


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#5 LU1AR

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Posted 28 May 2024 - 06:23 PM

My Travelscope improved a lot, when I painted the edges of the lens (With black fiber).
Also when I installed a funnel of coarse sandpaper (Painted black, with water-based school paint), that runs from the objective to the focuser. I also wound black sandpaper inside the focusing tube.
Regards.
Edgardo




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