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Who has a WO Zenithstar 73.,

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15 replies to this topic

#1 clearwaterdave

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Posted 12 April 2021 - 12:44 PM

Please share your likes and dislikes.,I have one on the way I'm hoping to use for terrestrial viewing/pics,. as well as moon pics and big sky views.,Thank you.



#2 Normmalin

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Posted 12 April 2021 - 01:32 PM

I got one about 2 months ago and have used it a couple of times so far for DSOs.  I like the relatively light weight and so far, the images look fine (at least to me).  I have an APS-C camera so I don't know about the full frame scenario and behavior at the edges.  I did get the adjustable flattner/reducer (not sure I need it ) and I was happy to find that with the T-ring adapter, my DSLR was almost in exact focus without any adjustment.

 

The only complaint I had, and I imagine others have seen this, is that access to the focus lock screw was difficult the first time out given the forward placement of the scope needed to balance on my EQ6-R.  I had no good access to the screw with the scope oriented normally (focus knobs down).  Solution was to invert the scope in the rings and put the screw on top.  

 

I do like the packaging and how the guide/finder scope bracket acts as a handle for the scope.  Also the dovetail has a number of holes along the length to allow flexibility in ring placement.

 

So far, so good.

 

Norm 


Edited by Normmalin, 12 April 2021 - 01:46 PM.


#3 clearwaterdave

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Posted 12 April 2021 - 02:11 PM

I read about the lock screw being in the way.,Can't the bar be moved forward up the rings so as not to be so far back.,In the pics I've seen it looks like it sticks out 2" behind the rear ring.,No more holes there..?  thanks.,



#4 dhkaiser

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Posted 12 April 2021 - 05:14 PM

I use my ZS73 for white light solar along with a Lunt 60mm Ha dedicated solar scope. Both visual and imaging.  

You can see moving the dovetail plate makes easy access to the focus lock down.

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#5 Normmalin

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Posted 12 April 2021 - 06:20 PM

Here is a pic of what I am talking about -- you can see that with the flattener/reducer there is quite a bit of weight camera side.  That is why I needed to move the bar so far forward.  There is only an inch or so of play on the dovetail bar.  You can see how the EQ6-R bracket extends near where the focus lock screw would be if I hadn't rotated the scope so the screw is on top.  dhkaiser's clamp is a more elegant solution.  

 

Thanks,

 

Norm

 

setup.jpg

 


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#6 clearwaterdave

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Posted 18 April 2021 - 07:50 AM

Well it's scheduled to arrive tomorrow via UPS.,I've put together a mount/ tripod for it and I have a 2" AstroTech diagonal on the way. I found out first hand how much a wooden tripod dampens vibration,.I went back and forth trying different setups and when the mount was on an aluminum tripod and I thumped the scope it vibrated 3-4 seconds. On the wooden one there was virtually no vibrations.,

 The tripod is from a mid 1980's Meade 80mmf/11.,and it does a good job holding that scope steady so I bet the WO will be pretty stable.,

 I post pics when it arrives.,Thanks for looking.,

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Edited by clearwaterdave, 18 April 2021 - 07:51 AM.


#7 clearwaterdave

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Posted 19 April 2021 - 06:04 PM

It arrived today safe and sound.,It's built to last that's for sure.,All focuser.,lol.,.and a fine one it is.,Got a few birdie pics before the rain started.,

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#8 clearwaterdave

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Posted 20 April 2021 - 01:40 PM

After playing with it as seen above I decided a new designed cradle to hold it was in order to deal with its focuser heavy build.,This is what I came up with.,It has been tested and tweeked an I think it will do.,I can also put it on Frank now for some super stable observing.,

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#9 clearwaterdave

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Posted 20 April 2021 - 01:44 PM

Another view.,I want to put it on Frank for a pic but it's raining now. Thanks for looking.,

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#10 clearwaterdave

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Posted 21 April 2021 - 01:28 PM

Here it is sitting on the throne.,It was cool beans peepin at luna last night.,

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#11 awong101

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Posted 21 April 2021 - 02:47 PM

You should check out my review of the William Optics Zenithstar 73.

 

I went over why I thought this was the best 2nd refractor for many beginners alike.

 

https://youtu.be/q99ze4316Sw


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#12 clearwaterdave

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Posted 22 April 2021 - 07:10 AM

I added a driving arm to the mount and ordered a padded case /bag that will hold the scope mounted on its cradle.,laser and all.,

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#13 Lite2

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Posted 22 April 2021 - 08:15 PM

This is my Z73 imaging rig for the last couple years, with the flat73 I have been happy with my captures. Have since lost the finder scope and have separate dew heaters for guider and scope, NOT a visual guy smile.gif

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#14 Lite2

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Posted 22 April 2021 - 09:16 PM

Just a few pics I have gotten with my Z73 From basically a downtown backyard, Bortle 8, White zone.

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#15 clearwaterdave

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Posted 23 April 2021 - 04:16 PM

Lite2,,Looks professional to me.,lol.,Very nice pic's.  I'm only looking to get a few moon an birdies shots., Also some wide field sweeping.,I look forward to getting out and enjoying this little gem.,Best2all.,

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Edited by clearwaterdave, 23 April 2021 - 04:18 PM.


#16 Oort Cloud

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Posted 27 April 2021 - 11:05 AM

I picked one of these up less than a month ago, along with a flat73r. The build quality is great. I have only had it out a few nights so far due to clouds being almost constant this month (except during the day, of course!). My only issue so far is I can't seem to get the flattener spacing correct.  I had it pretty close at one point, and should have left well enough alone (there was still some slight elongation in the corners). There are a couple recent pics I've taken with it on the astrobin in my signature. I'm thinking if I had a sensor larger than the 533mc, and could see farther out to the edges of the light cone, it might be easier get the spacing right. Although, the smaller sensor should be less sensitive to field curvature also. With the amount of effort it's taken, and the fact that at least one corner always seems to have elongated stars, I'm thinking there may be an issue with either the scope or the flattener, but have no real way to test it other than trial and error. Not having the milky way with its rich starfields available isn't helping either.


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