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Televue Genesis-It's Snowing in Austin Texas

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#1 Steve_M_M

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Posted 23 March 2020 - 10:08 PM

I posted a couple days ago about an estate sale here in the Austin area.  I have only been to one other estate sale in my life and that was to pick up some parts for the C8 now owned by Russell. 

 

When I posted the estate sale, I had little intention of looking at it.  My wife had forbid me to leave the house, the $2500 price tag seemed too high, and why would I spend any money right now???.  Yesterday, after providing my wife with an extensive list of precautions (for real) I would take, I contacted the estate sale people and made an appointment (appointment only and only one person on property at a time for 30 minutes max).  The home was more of a complex on 30 acres.  Just amazing.  It was clear the folks had $$.   As I posted yesterday, the telescope lens was a sea of mold.  The owners had a roll off roof observatory where the scope had been kept.  I declined to make an offer, but did have a nice discussion from a distance with the estate sale co. owner.

 

Today, they called back and asked if they could make me an offer.  I accepted and now I have this scope.  My wife requires that everything that arrives at our home has to go into a 3 day quarantine period, so all I could get thus far is a picture of the lens

 

So, my question, is there any hope for this lens?  What should my first step be?  It actually looks worse than the picture.  More like a blizzard :)

 

 

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Edited by Steve_M_M, 23 March 2020 - 10:10 PM.

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#2 Russell Smith

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Posted 23 March 2020 - 10:13 PM

https://images.app.g...pCS8woa6Z6c4Ku8


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#3 Cotts

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Posted 23 March 2020 - 10:13 PM

No picture?

 

And a Televue Genesis optical tube in good condition might fetch $1000 at most....  $2500 better have included a quality mount and a few TeleVue eyepieces and a 2-inch diagonal....

 

Call TelVue to see about re-furbishing the lens.....

 

Dave


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#4 ccwemyss

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Posted 23 March 2020 - 10:19 PM

Last year, at NEAF, I picked up an ATCO 1253 that was full of mold, thinking I was mainly buying it for the mount and accessories. The accessories turned out to be junk. So I decided to see if I could do anything with the objective. I tried isopropyl alcohol and distilled water as usual, and got nowhere. There happened to be a bottle of Scrubbing Bubbles with Bleach on hand, and I figured I had nothing to lose. To my surprise, the lens came out clear. At the right angle, you can see some coating damage in the reflection, but straight through, it's fine.

 

And on the bright side, it's also a disinfectant. 

 

Chip W. 


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#5 Steve_M_M

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Posted 23 March 2020 - 10:20 PM

No picture?

 

And a Televue Genesis optical tube in good condition might fetch $1000 at most....  $2500 better have included a quality mount and a few TeleVue eyepieces and a 2-inch diagonal....

 

Call TelVue to see about re-furbishing the lens.....

 

Dave
 

Picture was being uploaded to the post :)

 

This is the original non-sdf version of the Genesis.  This is going to be my shelter in place project.  I am going to give it my best shot and if it works, great...if not, that is fine too.


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#6 Augustus

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Posted 23 March 2020 - 10:24 PM

I've found that isopropyl alcohol works well on fungus as does dish soap. Sometimes even a rinse washes most away.



#7 Steve_M_M

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Posted 23 March 2020 - 10:24 PM

I figured I had nothing to lose.


 

Chip W. 

This would be me with this scope.  Scrubbing bubbles and oven cleaner have done me well in the past, but never on anything glass.  Yikes.
 



#8 Cotts

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Posted 23 March 2020 - 10:26 PM

How are the two internal lenses?

 

Dave


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#9 Van Do9:3

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Posted 23 March 2020 - 10:45 PM

Steve,

 

Great isolation project. I was looking for a mold remedy for a Tasso lens and found this post: https://www.cloudy.....-fungal-growth/. Check out ClamChip’s link in response #3. Good read.

 

Wishing you success in this rescue. 
 

My


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#10 Steve_M_M

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Posted 23 March 2020 - 10:56 PM

I don't know about the internal lenses yet.  Where is the fluorite lens in a Genesis? 

 

I'll try some hydrogen peroxide once I get the lens out.  I am expecting the lens cell itself to be a challenge.  We shall see.


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#11 Augustus

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Posted 23 March 2020 - 11:00 PM

I’d worry about peroxide eating the coatings? Or maybe I’m incorrect here.

#12 Steve_M_M

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Posted 23 March 2020 - 11:06 PM

I’d worry about peroxide eating the coatings? Or maybe I’m incorrect here.

Based on what I see visually, the coatings may already be damaged.
 



#13 Van Do9:3

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Posted 23 March 2020 - 11:07 PM

I have not tried the hydrogen peroxide/ ammonia mix but plan to do so tomorrow on a dud lens. 


Edited by Van Do9:3, 23 March 2020 - 11:08 PM.


#14 Terra Nova

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Posted 23 March 2020 - 11:13 PM

I don't know about the internal lenses yet.  Where is the fluorite lens in a Genesis? 

 

I'll try some hydrogen peroxide once I get the lens out.  I am expecting the lens cell itself to be a challenge.  We shall see.

The fluorite element is in the back (in the Petzval reducer/flattener). 


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#15 Steve_M_M

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Posted 24 March 2020 - 11:57 AM

How are the two internal lenses?

 

Dave

Dave,

 

I disassembled the scope and removed the front lens in cell today.  I am happy to report that looking down the tube the internal lenses are fine.  As a matter of fact, the mold is only on the front surface of the front lens.


Edited by Steve_M_M, 24 March 2020 - 07:25 PM.

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#16 Terra Nova

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Posted 24 March 2020 - 01:52 PM

I do know that the rear elements need to be perfectly collimated/aligned/tuned to the objective and when they aren’t, you don’t get optimal performance. That’s why people send these Petzvals back to TeleVue when they have them serviced. I wouldn’t attempt to take my Genesis SDF apart. Like my Questar, those are the two that I’ll leave to the professionals.


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#17 Steve_M_M

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Posted 24 March 2020 - 07:26 PM

I do know that the rear elements need to be perfectly collimated/aligned/tuned to the objective and when they aren’t, you don’t get optimal performance. That’s why people send these Petzvals back to TeleVue when they have them serviced. I wouldn’t attempt to take my Genesis SDF apart. Like my Questar, those are the two that I’ll leave to the professionals.

Clarified my post.  I wouldn't even know how to get those rear elements out  smile.gif

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Edited by Steve_M_M, 24 March 2020 - 07:41 PM.

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#18 Steve_M_M

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Posted 24 March 2020 - 07:43 PM

Here's one with no flash

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Edited by Steve_M_M, 24 March 2020 - 07:44 PM.

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#19 Pete W

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Posted 24 March 2020 - 07:55 PM

It doesn’t look too bad...



#20 G-Tower

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Posted 24 March 2020 - 07:59 PM

Easy fix


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#21 Steve_M_M

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Posted 24 March 2020 - 08:04 PM

Easy fix

Yep.  Much less than I expected for sure.
 



#22 Defenderslideguitar

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Posted 24 March 2020 - 08:09 PM

Very nice job

 I wanted a TV Genesis myself      you found  a great project for these stay in place times and you have already made the main remedial measure    nice going



#23 Steve_M_M

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Posted 24 March 2020 - 08:15 PM

Very nice job

 I wanted a TV Genesis myself      you found  a great project for these stay in place times and you have already made the main remedial measure    nice going

Yep, I am OCD so I put in about 10 hours today nonstop-no food, no nothing.  That was of course after I got clearance from the head of household on the anti bacterial bath I gave everything.  Just scope, starbeam,  and mount today.  Dec drive is dead :( 

 

 


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#24 Terra Nova

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Posted 24 March 2020 - 10:14 PM

It looks great Steve. I think you’re really going to love it! I sure love mine!

 

PS: I’m really glad you cleared that up! ;)


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#25 jerobe

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Posted 24 March 2020 - 10:26 PM

Steve, good result. What is the mount that it's on?


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