In February 2007 I acquired this nice (used) scope, which I will use for wide field imaging and autoguiding.
The scope came with a 2" Enhanced Diagonal, a set of guiding rings, a set of hinged mounting rings and an aluminium case.
Note: some of the pictures on this page are commercially available on the internet, while others are my own.

William Optics Zenithstar 80 ED II APO.
Aperture: 80mm; Focal Ratio: F/6.8; Focal Length: 545 mm
Objective Type: FPL-51 ED Glass, Doublet, Air Spaced, APO
Lens Shade: Retractable
Focuser: 2 inch 360 degrees Rotating Camera-angle Adjuster; 1:10 fine focus
Focuser Travel Length: 80mm
Tube Diameter: 90mm
Tube Length: 430mm Fully Retracted
Tube Length: 500mm Fully Extended
Tube Weight: 2.8 kg
The optics.
Aperture: 80mm; Focal Ratio: F/6.8; Focal Length: 545 mm
Objective Type: FPL-51 ED Glass, Doublet, Air Spaced, APO


Two speed focuser.
2" 360░ Rotating Camera-angle Adjuster; 1:10 fine focus; 1.25 inch Adapter.
With the small black bolt in the centre of the image the focuser friction can be adjusted: important for imagers !










Focuser Travel Length 3.15" (80mm)






Closeup

2 inch Enhanced Coating Diagonal.
High 97% reflectivity, enhanced coating
Precision 1/10 lambda surface with 10mm-thick mirror.

Guiding Rings 100mm (SOLD)
Nylon-tipped 3-point guiding rings. I sold these rings as I had no need for them.









The dimensions

Hinged Mounting Rings 90mm.










I have mounted them on a Piggy Back Rail which I made for the ZS80ED
Double Piggyback for Coronado PST
And on top of the hinged rings my Coronado PST gets a higher position.
Aluminium Case.
Dimensions: 57cm x 32cm x 21cm - Water Resistant








I wanted to see if I could image the whole moon/sun with my webcam cameras in one shot.
I knew that to be able to do this I needed to increase the Field of View of my scope by reducing the focal length as close to 300mm as possible.
So I mounted my 1.25 inch Mogg 0.6 Focal Reducer at the nosepiece of my SC3 camera [pixel size 7.4x7.4Ám] and tried to focus, but without the diagonal: I wanted ''straight through" as I think that such a diagonal might introduce flaws.
To reach focus I needed a 10cm extender, which I happened to have: the 'erecting eyepiece' which came with my Lidl Skylux scope




I removed the lenses from inside this tube and indeed: it works very nicely!






Next I used the 1.25 inch Mogg 0.6 Focal Reducer on a standard ToUcam 840 [pixel size 5.6x5.6Ám], but I could not reach focus: the 10cm extender was too long.
So I made this shorter [53mm] extender, which does the job nicely.
I made this extender from standard 32mm PVC tube, which I partly sanded down to 31.75mm.
I inserted this tube into a PVC tube [standard length 53mm], which is used by plumbers to join 2 lengths of 32mm tube.




A hose clamp, a 6mm nut and a set bolt ensure a snug fit.






But because of the pixel size of the standard ToUcam [5.6x5.6Ám versus 7.4x7.4Ám of the SC3 camera which gives a wider FOV] I cannot get the whole moon in one shot.





Inspired by my friends Matthias Meijer and Martin Burri I moved the Mogg 0.6 Focal Reducer further away from the CCD of the ToUcam by inserting 2 Baader Infra Red Blocking filters between the nosepiece and the Focal Reducer.
I hoped that this would give me enough extra FOV to capture the whole moon.
Yes, this might introduce vignetting, but that is something for later.



The result is promising indeed.
There is no need for any adapter but I can insert the ToUcam with nosepiece, 2x BIRB and 0.6 Focal Reducer straight into the focuser of the scope and reach focus while getting the whole moon in the FOV.
Note: yes, this shot is the full moon with the eclipse on its way: March 3, 2007.
2" Extender.
I bought this 2-inch extender [with an optical length of 5cm] so that I can mount my cameras in a more secure way and still reach focus when using my filterwheel and ATK16IC camera. Supplier: Teleskop-Service - Muenchen (Germany)
The whole set up:
William Optics Zenithstar 80 ED II APO + 2-inch 5 cm extender + Scope Teknix Filter Wheel + Astronomik LRGB Filter set + ATK16IC camera
The felt on the filterwheel is for this
The complete setup, but now with Meade 3.3 Focal Reducer and ATK16IC camera.
More here
The felt on the filterwheel is for this
The complete setup, but now with Meade 3.3 Focal Reducer and SC3 camera mounted.
[I have documented this as a 'how to' reference for myself].
More here
My Solar Imaging Setup
For more information about my setup please visit the relevant Equipment pages

This is the dew shield I made for my William Optics Zenithstar 80 ED II APO.
Please note the metal pins in the dew shield: they create diffration spikes, which are great for focusing and also look nice in the image.


A nice example of the above mentioned diffraction spikes: M35 - Open Cluster
February 9, 2008 18:23 - 18:54 UT.
Imaging: William Optics Zenithstar 80 ED II APO F/6.8 [focal length 545 mm], ATK16IC camera, Astronomik LRGB filters.
Exposures: L 13x90s [1x1]; RGB 5x30 [2x2]; all unguided.
Diffraction spikes mask with fishing line
In the plumbing department of my local DIY shop I bought a plastic ring which nicely fits in the dew shield I already made for my ED80.
To generate the diffraction spikes I used thin fishing line which gives more delicate spikes than the metal pins I used before.

Diffraction spikes mask with fishing line
The mask nicely fits in the dew shield and is easy to rotate to get upright spikes.


Diffraction Spikes of the 'fishing line' mask [M15 - Globular Cluster]
October 13, 2009 18:29 - 19:26 UT
Imaging: William Optics Zenithstar 80 ED II APO, f/6.8 [focal length 545 mm], Astronomik Lum filter; ATK16IC b/w camera, K3CCDTools.
Exposures: Lum 21x90s, unguided. RGB was not captured because of clouds.