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Do you know what a freaky sharp classic or a mush dog is?

Started by starman876 , Mar 09 2025 10:59 AM

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92 replies to this topic

#76 oldmanastro

Surveyor 1

Posts: 1,722
Joined: 17 Nov 2013
Loc: San Juan, Puerto Rico-US

Posted 11 March 2025 - 10:22 PM

My freaky sharp classic telescopes? The 3.5" Questar, ETX90, RV-6 Dynascope, Clammy (C102), and yes Scruffy the Celestar 8, the sharpest SCT I have ever seen. My Sears 76mm f/16 Astro Optical refractors can also be considered very sharp. My mush dog is an Edmund Astroscan. When I observed Mars with the RV-6 during the 2003 perihelic apparition, I decided that I would keep this telescope for the reminder of my earthly existence with all the other freaky sharpies.

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#77 CHASLX200

ISS

Posts: 44,048
Joined: 29 Sep 2007
Loc: Tampa area Florida

Posted 12 March 2025 - 05:47 AM

Never seen a cass yet worth a hoot. My Astroscan was also a sea of coma back in 1980.

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#78 Rick-T137

Gemini

Posts: 3,107
Joined: 28 Feb 2015
Loc: Canada

Posted 12 March 2025 - 07:08 AM

Never seen a cass yet worth a hoot. My Astroscan was also a sea of coma back in 1980.

What about your freaky sharp 1984 C8? Wasn't that worth a hoot?

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#79 CharlieB

Fly Me to the Moon

Posts: 5,729
Joined: 11 Dec 2007
Loc: Southern NH

Posted 12 March 2025 - 07:28 AM

DPAC sorts them all.

Freaky sharp Unitron 50mm

Mushiest dog Soligor 60mm

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#80 Senex Bibax

Surveyor 1

Posts: 1,602
Joined: 01 Feb 2019
Loc: Ottawa, ON

Posted 12 March 2025 - 07:29 AM

My C14 had cardboard like from a cereal box. But the prior owner had taken it apart, so I don’t know if it was original.

Chip W.

I've got sheets of all different gasket materials from paper to cork to rubber to synthetic fibre. Don't know what would work best but I wouldn't trust myself to be able to cut it precisely enough to use under an SCT corrector plate.

Oh, and Freaky Sharp would be my Celestron / Vixen 80mm shorty refractor. Haven't had any total mush dogs, but I'm still trying to get my Meade 310 / Mizar dialled in to my satisfaction.

Edited by Senex Bibax, 12 March 2025 - 07:32 AM.

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#81 deSitter

Still in Old School

Posts: 21,376
Joined: 09 Dec 2004

Posted 12 March 2025 - 07:34 AM

DPAC sorts them all.

Freaky sharp Unitron 50mm

105 inside.jpg

Mushiest dog Soligor 60mm

soligor dpac.jpg

Holy heck that is awful!!! Sure would like to see the star test on that thing

-drl

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#82 Bomber Bob

ISS

Posts: 24,600
Joined: 09 Jul 2013
Loc: The Swamp, LA (Lower Alabama)

Posted 12 March 2025 - 11:41 AM

DPAC sorts them all.

Freaky sharp Unitron 50mm

105 inside.jpg

Mushiest dog Soligor 60mm

soligor dpac.jpg

Yikes!!

DPAC doesn't lie. But... some Patterns may be shocking!

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#83 Kasmos

Cosmos

Posts: 7,535
Joined: 19 Aug 2015
Loc: So Cal

Posted 12 March 2025 - 02:13 PM

DPAC sorts them all.

Freaky sharp Unitron 50mm

105 inside.jpg

Mushiest dog Soligor 60mm

soligor dpac.jpg

I don't have a DPAC but my Soligor was also beyond Mushy so it probably would have tested the same. It looked like it had zones all over the place. The Kenko 60/710mm TA-710 was the same way. Both telescopes were so bad they were completely unusable so the objectives were replaced with very good ones.

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#84 CHASLX200

ISS

Posts: 44,048
Joined: 29 Sep 2007
Loc: Tampa area Florida

Posted 12 March 2025 - 06:00 PM

What about your freaky sharp 1984 C8? Wasn't that worth a hoot?

Not a Cass. I mean the real Cass.

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#85 deSitter

Still in Old School

Posts: 21,376
Joined: 09 Dec 2004

Posted 12 March 2025 - 06:16 PM

Not a Cass. I mean the real Cass.

Peter Ceravolo bought and restored a 16" Boller and Chivens Cassegrain and the performance is absolutely spectacular.

You can lean on the mount while using it without disturbing a thing. But the dual-axis motors would be a no-go I imagine.

https://www.cloudyni...-16-cassegrain/

-drl

Edited by deSitter, 12 March 2025 - 06:16 PM.

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#86 CharlieB

Fly Me to the Moon

Posts: 5,729
Joined: 11 Dec 2007
Loc: Southern NH

Posted 12 March 2025 - 06:29 PM

Holy heck that is awful!!! Sure would like to see the star test on that thing

-drl

No, you wouldn't.

Here's another bad one. 40mm Hino, Just a null test, but quite revealing.

Charlie

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#87 NinePlanets

Mercury-Atlas

Posts: 2,896
Joined: 12 Sep 2018
Loc: High and Dry

Posted 12 March 2025 - 06:34 PM

I have an excellent DK Cass, CHASLX200. It's clean images far exceed any SCT I've ever looked through. They exist. (But I also have a pretty mushy one.)

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#88 CHASLX200

ISS

Posts: 44,048
Joined: 29 Sep 2007
Loc: Tampa area Florida

Posted 12 March 2025 - 06:35 PM

Peter Ceravolo bought and restored a 16" Boller and Chivens Cassegrain and the performance is absolutely spectacular.

You can lean on the mount while using it without disturbing a thing. But the dual-axis motors would be a no-go I imagine.

https://www.cloudyni...-16-cassegrain/

-drl

Well that is not gonna work at my house nor can i lift the OTA. Just everyone i looked thru at parties were nothing to get all worked up about and same the Newt - verts like the Caves.