According to Celestron, the back focus distance for the EdgeHD 8" is 133.3mm.
The Nikon Z series has got a flange distance of 16mm, the Wide T-ring is 8.3mm long, so in total its 24.3mm. The Celestron t-adapter is 50mm long for a total of 74.3mm.
Your answer said I needed 30.7mm of distance, but don't I still need 59mm of distance (133.3 - 16 - 8.3 - 50 = 59)?
The EdgeHD T-Adapter #93644 is 78,3mm long and needs an extension of 30,7mm that it fits your camer/bayonet ring.
The T-Adapter #93633-A (second link) is 50mm long and could be used too. Just keep in mind that you need then of course
different distance rings/extensions.
We recommend this bigger M48 adapter instead of the smaller with T2 thread M42x0,75 because your camera has a full format sensor. From this adapter you have 55mm left which should be fine for DSLR cameras. But you have a mirrorless camera with 16mm back focus plus this Rings:
which hight is 8,3mm. So you have a gap of 30,7mm between your camera and DSLR (55-16-8.3) which you can fill with this rings:
https://www.baader-planetarium.com/de/m48-fein-abstimmringe-aus-aluminium-(03--05--1-mm).html (2pc of 1mm and 1pc of 0.5mm)
Since the Field Flattener has a M48 Male thread, you would need the #2459129 Telescope Side Adapter
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
as well as a VariLock spacer set at 18,4 mm #2459145
Then you would need the UFC Basis #2459110 which has an optical length of 13 mm,
the 2" Filter Slider #2459112 (we suggest one slider for each filter, which makes changing filters faster and more comfortable),
the S52 UFC Camera Adapter #2459119,
and the Nikon Z Wide T-Ring #2408335.
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
The easiest way is usually the S52 barrel #2958551, then you can adapt it like any 2" eyepiece.
For all other configurations, please let us know which threads you have available or if you need to keep a certain distance.
What part number do I need from baader to make that happen?
1x Baader UFC Straylight-Flange # 2459121
1x Baader UFC Base (Filter Chamber) telescope-sided S70 dovetail receptor (optical height: 13 mm) # 2459110
As many Baader UFC 2" (M48) Filter Slider # 2459112 as you have filters
1x Baader UFC S70 / SP54 (m) Telescope-Adapter (optical height: 1 mm) # 2459134
You also need the matching DT-rings https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/camera-adapters/dt-rings.html to adapt from SP54 to the filter thread of your lens. I do believe that the Nikkor uses 77mm filters, but you should check the manual. For 77mm, you need two rings:
1x Baader Hyperion DT-Ring SP54/M62 for DTAdapter II&III and Hyperion Eyepieces # 2958062
1x Baader Hyperion Stepper-Ring M62 onto M77 # 2958077
Please note that the 2" filter is much smaller than your camera lens and will cause some vignetting.
I wish to connect my Nikon Z6 to my Astro-Physics 130 GT, with the 2.7" focuser. I have purchased the Wide T ring for the Z camera, as well as the universal filter changer. I am not using a reducer or field flattener. What else do I need to purchase?
The best would be
Baader UFC S52 dovetail camera-adapter #2459119
which fits directly to the Wide T-Ring, if you remove the T-2-inset from the Wide-T-Ring (there should be an Allen key included with the T-ring to do this). This gives you the widest free aperture and a permanent connection to the UFC, so it's probably the best if you attach the UFC to your telescope with a 2" nosepiece.
If you prefer a screw-coupling, you can also replace the T-2-inset of the Wide-T-ring with the optional
Reducing piece S52 / M48 # 2958552
and combine it with
Baader UFC M48 (m) Camera-Adapter # 2459116
This lets you use the full diameter of a 2" nosepiece or filter, and you can easily unscrew the camera from the filter holder
Otherwise, you can use the
Baader UFC T-2 (m) Camera-Adapter # 2459115
for a screw-coupling.
This is the standard solution as it was used for years, but you are limited to about 40mm of clear aperture because of the T-2-thread – so, if you use a full frame camera, there will be some vignetting at the edges. It's fine for APS-C and smaller sensors.
The Celstron M48-adapter #93622 is designed for 55mm of backfocus, so you need another 30.7mm of extension rings. The Celestron M48 adapter set #93618 contains a 30mm ring, which is close enough - the missing 0,7mm for perfect distance can be filled with Baader M48 Fine-Adjustment rings (0,3 / 0,5 / 1 mm) - https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/m48-adapter-system/m48-fine-adjustment-rings-(03--05--1-mm)---aluminium.html . You should be within 0.5mm of the optimum backfocus distance for best images, so the 0.5mm-ring will be fine.
You might also use variable T-2-extensions, but for a full-frame camera, we recommend the M48-system to avoid vignetting.
The Nikon Z has got a flange focal distance of 16mm, to which our Wide T-Ring adds 8.3mm. The
- T-Adapter (C5, 6, 8, 9-1/4, 11, 14) #93633-A # 820760
adds another 50mm, so you have a distance of 74,3mm and need another 30mm as T-2-extensions – e.g.
- 2x Baader T-2 / 15 mm Extension Tube (T-2 part #25A) # 1508154.
For the UFC, you can mount it directly to the SC-thread of the reducer e.g. with
- Baader UFC S70 / 2" SC-thread (f) Telescope-Adapter (optical height: 1 mm) # 2459128
- Baader UFC Base (Filter Chamber) telescope-sided S70 dovetail receptor (optical height: 13 mm) # 2459110
- e.g. Baader UFC 2" (M48) Filter Slider # 2459112 for 2"-filters
- Baader S52 dovetail Camera-Adapter for Wide-T-rings (optical height: 2 mm) # 2459119
- Baader UFC S70/15 Extension 40mm # 2459143
- Baader UFC S70 Extension 5mm # 2459141
- Baader UFC S70 VariLock 15-20mm extension # 2459145 set to 20mm
That's 81mm for the UFC plus 24mm for the camera + Wide T-ring
This gives you a larger free aperture than the T-2-adaptation above. Of course, you can insert an empty filter slider to take photos without a filter.
- Celestron 48mm T-Adapter for EdgeHD 9.25”, 11”, and 14”, Item #: 93622
- Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52 # 2408335
- Baader Reducing piece S52 / M48 # 2958552
The Celestron 48mm adapter has got a backfocus of 55mm; our Wide T-ring is 8.3mm thick, and the Nikon has got a flange distance of 16 mm. So, you still need an M48-extension of 30.7mm. Currently, we have got M48 Fine-Adjustment rings seperately or as set (0,3 / 0,5 / 1 mm) - # 2457915, but you'd need to get a 30mm-extension from another manufacturer.
We could either offer you a T-2-adaptation (but there would be vignetting with a full frame sensor, so it is not recommended), or use the space for our UFC filter changer. It would fit in this gap with M48-connections, but it is of course more expensive than a simple extension tube.
The Nikon Z series has got a flange distance of 16mm, the Wide T-ring is 8.3mm long, so in total its 24.3mm, and you need an additional spacer with 30.7mm.
This can be done either with 2x Baader T-2 / 15 mm Extension Tube (T-2 part #25A) # 1508154 plus some T-2 Fine-Adjustment rings (0,3 / 0,5 / 1 mm) - set #2457910, also available seperately. The distance should be matched by +/- 0.5mm for the EdgeHD.
You can also use 1x Baader VariLock 46, lockable T-2 ExtensionTube 29-46mm with spanner tool (T-2 part #25V) # 2956946 to set the right distance.
- Related Articles
|Net weight (kg)||0.05|
|Optical length (mm)||8,3|
|Camera Adaptable||Nikon Z Bajonett|
|Inner Diameter / Clear Aperture (mm)||41mm (T-2) / 49,3mm|
|Inner Connection (lens sided)||S52, T-2 (M42 x 0,75)|
|Outer Connection (eyepiece/-camera-sided)||Bayonet|
|Compatible Brands||Astro T-2, Baader Planetarium, Other|
|Type of Adapter||Camera Adapter|
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