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focal reducers
http://www.boltonastro.co.uk/forums/viewtopic.php?f=4&t=746
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Author:  ANuttall [ Sat Jan 31, 2015 1:19 pm ]
Post subject:  focal reducers

hello everyone what are the benifits of putting a focal reducer on a F6 refractor

Author:  rwilkinson [ Sat Jan 31, 2015 1:34 pm ]
Post subject:  Re: focal reducers

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

Author:  ANuttall [ Sun Feb 01, 2015 11:22 am ]
Post subject:  Re: focal reducers

cheers for that ross, see you tuesday

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