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Zhumell Z100 100mm f/4 Newtonian

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#226 Sky Muse

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Posted 18 September 2019 - 09:56 AM

Oh dear, this thread was at the very bottom of this first page when I stumbled in and decided to update it.  We can't have it disappearing into the second page, and into oblivion.

 

My OCD couldn't take it any longer...

 

redo.jpg

 

That GE silicone, I just don't know.  The mirror was being held firm, but I noticed after the silicone had set that I didn't have my 9.15mm distance between the edges.  It was more like 8.25 or so; can't have that.

 

I'll be going out today to get some aquarium-type Loctite or Permatex clear silicone, and this time round to apply it a bit more sparingly.



#227 Sky Muse

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Posted 18 September 2019 - 06:28 PM

I'm now loaded for proverbial bear...

 

sealant-adhesive.jpg

 

...but I'll need to decide which to use.  The LOCTITE is touted as being aquarium-safe...

 

sealant-adhesive2.jpg

 

...good thing that, so I've read.



#228 Sky Muse

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Posted 19 September 2019 - 05:01 AM

I took this image from about three feet away...

 

curing.jpg

 

I tried to get closer, but it shouted out, "Don't touch me!".



#229 Sky Muse

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Posted Yesterday, 01:17 AM

mirror-stalk position8b.jpg

 

mirror-stalk position8c.jpg

 

mirror-stalk position8d.jpg

 

mirror-stalk position8.jpg

 

Now to blacken where needed...

 

Oh, in the end, I used the aquarium-safe LOCTITE silicone.


Edited by Sky Muse, Yesterday, 02:24 AM.


#230 Sky Muse

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Posted Yesterday, 04:56 AM

In that I elected not to paint the stalk, also in the end always having to paint the edge round the reflective surface by hand, I painted the entire mirror with a small flat then a smaller round among my artists' brushes, and with chalkboard-black...

 

secondary mirror9.jpg

 

secondary mirror8.jpg

 

cowling - mirror.jpg

 

secondary mirror7.jpg

 

I could flock the stalk, but I don't really see the need as both the hub and mirror obscure it.  I didn't want to flock the mirror either, as I want every last millimeter in reduction of the obstruction possible.

 

Now I can resume working on the optical-tube...


Edited by Sky Muse, Yesterday, 04:56 AM.



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