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Old 28-07-2014, 03:47 PM
aarong (Aaron)
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Back focus of DFK 21AU618.AS

Hi guys,

I'm trying to find out the back focus for the Imaging Source DFK 21AU618.AS. I can't get it to come to focus with a QSI 683 and know that the QSI is made for guide cams with a back focus of 12.5mm, so wondering if that is why?

I see you can get an over-priced adapter for the QSI to make the back focus 17.5 mm for a guide camera.

Thanks for your help.

I'm learning the new world of mono ccd imagining, from coming from a DSLR.

Note: I have been using the Image Source cam as a guide cam with a guide scope, but worried about flexure with a heavy cam hanging off the back of a 8" LX90 (plus focuser, focal reducer etc).
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Old 29-07-2014, 12:01 PM
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Merlin66 (Ken)
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All the DxK series are 17.5mm back focus.
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Old 29-07-2014, 04:26 PM
aarong (Aaron)
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Thank you!!
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