Robindonne

If possible, download Bruce Buffers voice to tell you “iiiiiits tiiiiiiiiime”

It looks really solid.  How is that harmonic gear under the load of the scope?   Is the fork directly attached, and the weight of the fork/ota combo hanging on the harmonic drive?

Jee these Celestron batteries arent cheap.  And that Beaudens pack looks solid to me.  Ive never used one of them, and was always planning to get that cheap skywatcher 17ah tank, but like your Beaudens option shows, there are many more alternatives.  YouTube reviews and reactions tell it must be a solid product. 

No its the percentage of the scopes diameter. Not the overall percentage of the scopes aperture

in your example i think it must be around 10-15% obstructed of the initial aperture

Hellooo👋🏼👋🏼

Dont know if the original image was bad or the printing of that book.  But indeed😍 they made a huge step

Do you mean the eaf stops working after some turns? 

Lets hope we go slowly back to the old normal😫

47 minutes ago, Vroobel said:

Ah, OK. I had this as plan on the beginning, but my (to be honest - not my) solution is better. In Liverpool latitude is over 53*, so I have lot of space under the top surface of the wedge for its jack and stepper motor. In your solution I would have only 37 degrees. Moreover, in present position the heavy harmonic drive, motor, fork and finally the OTA push the wedge down, which is natural situation for the car jack. In opposite position the jack should be pulled up, while I'm not sure if it's OK for it. 

To prevent it the wedge should be very heavy, much more than the present 36kg.

Ah yes i see🙂. That might be true

12 hours ago, Vroobel said:

Up side down? It will still be wedge, but not equatorial and without possibility to fasten to the base. Is it what you mean? 

No, more like,

from this:

to:

will it tip over?  

On 25/07/2021 at 11:54, Vroobel said:

Hi. 

3rd day in row: determining a centre of the mass. It's necessary for determining a size of the base platform. 

Finally I was able to hang my OTA without stress, but there was still needed some significant load to let it fall over. It should be really big guider with accessories. 

Now I know that I have to build a kind of trapeze-shape base platform around 80cm x 40cm, 110cm long. 

What would happen when you rotate the heavy metal wedge?  Like in this picture, the side with the red clamps under the ota. 

Or gaming pc

Its probably a lazy way to type: glass path corrector😅

Don’t forget to take off the outfit when you take a walk through a field with bulls😅

Were they tic-tac shaped?

My daughters Skymax127 outperforms every 4” apo.  
 

But seriously, a very nice collection you are building in a short time.  The best way to do it in my opinion! 
 

16 minutes ago, rl said:

would be a bit suspicious...

metoo.

 you guessed the telescope's origin correctly.  And while my untrained eye is far from being able to detect differences in qualities when using a telescope, let alone ever request a report for a telescope myself, it should give the end user some confidence.  And I am really open to a value judgment based on professional measurements.  unless the mirror dimensions do not match.

something tells me the text is trying to tell its a report of a 17?mm telescope.  Possible a 7”.  And that’s  not corresponding.  
the only thing I doubt is that some reports indicate mirror diameter in measured pixels.  That could be the only thing that would make this report more credible

26 minutes ago, vlaiv said:

honestly doubt accuracy of this report as is.

thanks.  indeed a questionable piece of paper with ink.  I have far too little knowledge to get anything meaningful from this report other than that it comes from Zygo.  The only thing I can deduce from other reports is that sometimes the size of the measured object is indicated.  see even reports with a clear mention of the telescope.  in this case, a fraction of a certain size appears to be readable.  half hidden behind a diagram.  I doubt whether these are millimeters or pixels or something else.  My mirror is round and has a hole in the middle 🙂.  Based on that resemblance alone, I cannot assume that this report is actually correct.  There seems to be far too easy to cheat on me.  And completely suspicious if the size of the mirror does not match.

Although its probably not that important (due to not really knowing the report belongs to a particularly scope), i can’t seem to find a well explained explanation or info on how to read these diagrams and numbers.  
 

I received this report as a “screenshot” with the purchase of a used scope. No further details about the scope are shown.  I have my doubts about this report and therefore want to ask someone who can read it.  
 

Can someone, based on the info given in the report, tell the possible mirror size which is tested? 

many thanks. 

Celestron is doing a nice job with all the scratched and broken optical parts of their sct’s.  
 

On 01/07/2021 at 23:27, Fedele said:

wife

These italian-english translation apps are not as good as they used to be🙂

In a world where even the delivery of a piece of wood is heavily delayed, the James Webb will launch?  I hope its not a cryptic message like:  “I will give each SGL member £1000,- but not earlier then next Monday”. 
I hope they make it happen this year😍

Nice build.  So everyone is happy after all.  Hope you can find a way to get te roof-movement to have a slow start and stop. It might keep the wooden construction a bit more intact for a longer period. 

without having used either one I would always go for the Skywatcher.  seems like a much better purchase/investment. 

I would keep an eye on astrobuysell (when you’re in the UK!).  You can find cheap gotos for £300,- used.  
Meade lx75 is a cheap option £200,- its not the best but it works i quess, or a Skywatcher eq5 3/400,-   
 

with a bit patience and short reactiontime, you’ll succeed.