Due to the thickness of the glass, we neeed to add 1/3 of the filterthickness to the backfocus required, which makes it aprox. 63,7 mm. You should keep this in mind when making the calculations later on.
Since the Field Flattener has a M48 Male thread, you would need the #2459129 Telescope Side Adapter
https://www.baader-planetarium.com/de/baader-ufc-s70-m48-(w)-adapter-teleskopseitig-m48-gewinde.html
Next you would need a few spacers which can be calculated by subtracting from the required backfocus, the optical length of the other needed adapters. A list with the calculations and the needed articles is included below. We determined that you would need one 5 mm spacer #2459141
https://www.baader-planetarium.com/de/baader-ufc-s70-extension-5mm-%E2%80%93-mit-s70-schwalbenschwanz-bzw.-s70--fassung.html
as well as a VariLock spacer set at 18,4 mm #2459145
https://www.baader-planetarium.com/de/baader-ufc-s70-varilock-15-20-mm-beidseitig-s70-schwalbenschwanz-bzw.--fassung.html
Then you would need the UFC Basis #2459110 which has an optical length of 13 mm,
https://www.baader-planetarium.com/de/baader-ufc-basis-teleskopseitig-s70-schwalbenschwanz.html
the 2" Filter Slider #2459112 (we suggest one slider for each filter, which makes changing filters faster and more comfortable),
https://www.baader-planetarium.com/en/baader-ufc-2%22-(m48)-filter-slider.html
the S52 UFC Camera Adapter #2459119,
https://www.baader-planetarium.com/en/baader-ufc-s52-dovetail-camera-adapter-(eos--sony).html
and the Nikon Z Wide T-Ring #2408335.
https://www.baader-planetarium.com/en/baader-wide-t-ring-nikon-z-with-d52i-to-t-2-and-s52.html
To represent everything in a more compact way, I'm putting the whole information in a list form below:
- Article description- -Article number- -Optical length-
1- M48i UFC Telescope Adapter #2459129 1 mm
2- S70 UFC Extension Ring 5mm #2459141 5 mm
3- S70 UFC VariLock 15 - 20 mm #2459145 18,4 mm
4- UFC Base Filter Chamber #2459110 13 mm
4a- UFC Filter Slider #2459112 0 mm
5- S52 Camera dovetail Adapter #2459119 2 mm
6- Nikon Z Wide T-Ring #2408335 8,3 mm
7- Nikon Z Flange-to-chip Distance ------------ 16 mm
_________________________________________________________
Total optical path: 63,7 mm