Quote:
Originally Posted by Mqrko
Is the 56mm spacing also for a Full Frame DSLR ?
I need to calculate the distance of
focal reducer + OAG + 2" t adapter + t ring
then add some spacers to find the optimum focus
is it correct ?
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Hi Marko,
the spacing refers to the sensor spacing not the front of the camera - for eg I know with canons the sensor to "start of the camera" is 44mm which only leaves ~11mm to squeeze in a coma corrector (which requires spacing 55-58mm similar to the field flattener) with OAG between them.
Which meant using a 0mm bayonet eg
http://www.teleskop-express.de/shop/...optical-l.html note that this link is for a canon I don't know if they exist or not for Nikons.
So you may need a field flattener with longer spacing to get around it - I don't have a refractor so not sure if they are common.
cheers
rusty