focal reducers

For those interested in imaging and image processing with DSLR, CCD, webcam or film.
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ANuttall
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focal reducers

#1 Post by ANuttall » Sat Jan 31, 2015 1:19 pm

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

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rwilkinson
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Re: focal reducers

#2 Post by rwilkinson » Sat Jan 31, 2015 1:34 pm

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:
viewtopic.php?f=6&t=605

ANuttall
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Posts: 48
Joined: Sat Jan 11, 2014 2:32 pm
Location: Shaw,Oldham

Re: focal reducers

#3 Post by ANuttall » Sun Feb 01, 2015 11:22 am

cheers for that ross, see you tuesday

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