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 Post subject: focal reducers
PostPosted: Sat Jan 31, 2015 1:19 pm 
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Joined: Sat Jan 11, 2014 2:32 pm
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Location: Shaw,Oldham
hello everyone what are the benifits of putting a focal reducer on a F6 refractor


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 Post subject: Re: focal reducers
PostPosted: Sat Jan 31, 2015 1:34 pm 
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Location: Bolton
You'll get a larger field-of-view and shorter exposure times.
And it may provide some "field-flattening" too.
But having the extra glass in-line could give you more dispersion.

As I use small sensors(converted webcams, CCTV cameras and old cooled CCDs) I've been using one of the focal reducers which I got for my f/10 SCT on my f/7 refractor too:
http://www.boltonastro.co.uk/forums/viewtopic.php?f=6&t=605


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 Post subject: Re: focal reducers
PostPosted: Sun Feb 01, 2015 11:22 am 
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Location: Shaw,Oldham
cheers for that ross, see you tuesday


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