Hi i want some help to find the right distance. I use QHY9 + Starlight xpress FW+ OAG Starlight.
The optical window from qhy9 removed.
Someone with the same setup for help!!!
thanks  |
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Juan Filas:
Hi, is 63mm
Interesting, the manufacturer states 55mm. Why is the optimal distance so much larger?
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The distance is 55mm if you use the adapter that comes attached to the flattener or 63mm if it is removed (page 8 of the manual, available on the SW website).
The point is to cover exactly this distance taking into account the proper distances of your equipment:
Backfocus camera + FW + OAG + The filter itself* + adapters = 55mm
*for the filter a distance of 1/3 of the filter width is usually calculated.
Manual: https://www.skywatcherusa.com/pages/support-center |
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The right distance from the back of field flatterer to your camera sensor is 55mm. +-1mm will be ok too.
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Hi i try to fix all the system with 55mm but it's not possible. I must take off the oag and i don't want it.
Now i have 58mm. I will try it at next new moon and i will inform you for the result with image!!!
Thanks all 8)
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Hi I do some tests with 58mm distance and is fine. It has a little in corners but is very small!!,
Thanks
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