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Old 06-01-2015, 11:09 AM
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photosinferno (John)
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CCD Spacing question

Hi All,
Long shot I know but does any one know by practical experience - or can point me in the right direction - of the 'Spacer' distance for the William Optics Field Flattener 3 from the CCD/Sensor plane?
The schematics from WO seem to indicate 56mm - I just want to confirm that is what people have practically experienced
The CCD I'm going to be using has 13mm of back focus inbuilt.


Many thanks
John
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Old 08-01-2015, 11:59 AM
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graham.hobart (Graham stevens)
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spacing

Hi, I believe that is the same spacing that the WO IV and the hutech FR have i.e 56mm so in my (limited experience) you are correct- 56mm minus your CCD backfocus (taking into account any connectors or filters) is what you are left with to space.
I use approx 30mm spacers on my OSC CC with a reducer/flattener.
I don't think the spacing on flatteners is as critical as on reducers but I may be wrong.
Cheers
Graham
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Old 08-01-2015, 07:48 PM
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photosinferno (John)
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Quote:
Originally Posted by graham.hobart View Post
Hi, I believe that is the same spacing that the WO IV and the hutech FR have i.e 56mm so in my (limited experience) you are correct- 56mm minus your CCD backfocus (taking into account any connectors or filters) is what you are left with to space.
I use approx 30mm spacers on my OSC CC with a reducer/flattener.
I don't think the spacing on flatteners is as critical as on reducers but I may be wrong.
Cheers
Graham
Thanks Graham,
That confirms what I thought- at least I can start in the right 'ball-park'

Many
John
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