Thread: Experiment with a 4inch Tasco
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  #7  
Old 08-10-2009, 04:31 PM
Ian Robinson
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Ian Robinson is offline 		 
Join Date: Jan 2007
Location: Gateshead
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Quote:
Originally Posted by Terry B View Post
How were you going to change the focal length?
You would need a new mirror.
A barlow lens will do that ....
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