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Equipment Discussions >> Classic Telescopes

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gelkin
Pooh-Bah
*****

Reged: 09/22/10

Loc: Western, MD.
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: Datapanic]
      #5750717 - 03/22/13 09:36 PM Attachment (5 downloads)

Quote:

Thanks Gerald

On your 8" Lightweight Deluxe - is that a factory tangent arm? How do you keep the Dec Circle from hitting the Pier?



Dan
I'm glad you forgot the times i pestered you for tanget arm measurements. I made that one. Because of it i made myself a dec circle problem too. To fix it i also made a longer dec pointer to allow the circle to be lower on the shaft. details here. I just can't leave well enough along.


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bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: gelkin]
      #5750738 - 03/22/13 09:46 PM

That is nice resto work. Need to find myself a Cave, Always wanted a 10" F6.

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Datapanic
Carpal Tunnel
*****

Reged: 10/17/09

Loc: Tucson, Arizona
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: gelkin]
      #5750741 - 03/22/13 09:48 PM

Doh! And that was only 2 years ago. I'm getting old.

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gelkin
Pooh-Bah
*****

Reged: 09/22/10

Loc: Western, MD.
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: bremms]
      #5750747 - 03/22/13 09:50 PM

I'm longing lately for a 10 or 12 in Cave myself. After seeing Tims huge mount and 12 in i'm not sure if anything else will satisfy.

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gelkin
Pooh-Bah
*****

Reged: 09/22/10

Loc: Western, MD.
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: Datapanic]
      #5750750 - 03/22/13 09:53 PM

Quote:

Doh! And that was only 2 years ago. I'm getting old.




Oh how i feel your pain.


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Datapanic
Carpal Tunnel
*****

Reged: 10/17/09

Loc: Tucson, Arizona
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: gelkin]
      #5750798 - 03/22/13 10:18 PM Attachment (7 downloads)

Here's the Finder. I'm not sure who made it as there are no markings on it at all. It is 50mm and has a helical focus ring and about 3/4" of travel. The diagonal also has no markings and is required to get focus. It did not come with an eyepiece, but I have a few lying around that could be used for that purpose - 1.25". It seems to be high quality but has a little bit of play in the focus.

Edited by Datapanic (03/22/13 10:20 PM)


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Datapanic
Carpal Tunnel
*****

Reged: 10/17/09

Loc: Tucson, Arizona
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: Datapanic]
      #5936649 - 06/23/13 03:51 PM

So last week, I did a field test and that finder is now in my "Don't Like It" category. First, the thing is nearly twice as heavy as a standard circle-T 50mm finder - it weights in at a hefty 654g which is a lot for a finder! Second, I don't have an eyepiece around 18mm or so with crosshairs and due to it's limited focus travel of 1", it cannot use longer FL eyepieces without some sort of extender. But mainly, it's just too heavy and would require somewhere between 0.5lbs to 1.0lbs of additional tube weight to balance it out.

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Datapanic
Carpal Tunnel
*****

Reged: 10/17/09

Loc: Tucson, Arizona
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: Datapanic]
      #5936653 - 06/23/13 03:57 PM Attachment (3 downloads)

In the back of the garage, there's an ATM 6" OTA with everything but the mirror that I bought with a Cave 1.5" mount for a song a couple months ago. It came with a nice circle-T convertible right-angle/straight through finder that was in pretty good condition, so after cleaning it up, paint and replacing the broken cross-hairs, this one will be used for the finder instead.

It weighs in at 424g in right-angle mode and 376g in straight through mode - more than 0.5lbs lighter than the other finder!


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CHASLX200
Post Laureate
*****

Reged: 09/29/07

Loc: Tampa area Florida
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: Datapanic]
      #5936681 - 06/23/13 04:14 PM

Quote:

In the back of the garage, there's an ATM 6" OTA with everything but the mirror that I bought with a Cave 1.5" mount for a song a couple months ago. It came with a nice circle-T convertible right-angle/straight through finder that was in pretty good condition, so after cleaning it up, paint and replacing the broken cross-hairs, this one will be used for the finder instead.

It weighs in at 424g in right-angle mode and 376g in straight through mode - more than 0.5lbs lighter than the other finder!




That looks like the finder Meade used to sell in the later 70's. Had a few of them over the years and liked them.

Chas


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turk123
Pooh-Bah
*****

Reged: 07/09/10

Loc: N.E. Ohio
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: CHASLX200]
      #5936703 - 06/23/13 04:31 PM

Quote:

Quote:

In the back of the garage, there's an ATM 6" OTA with everything but the mirror that I bought with a Cave 1.5" mount for a song a couple months ago. It came with a nice circle-T convertible right-angle/straight through finder that was in pretty good condition, so after cleaning it up, paint and replacing the broken cross-hairs, this one will be used for the finder instead.

It weighs in at 424g in right-angle mode and 376g in straight through mode - more than 0.5lbs lighter than the other finder!




That looks like the finder Meade used to sell in the later 70's. Had a few of them over the years and liked them.

Chas




Yep, I just bought a 70's meade (God rests their sole) for my Cave Cass. It looks a lot like that also. Mine has a white shield on the front that will get painted. The optics are a little too short for terrestrial, but I'm thinking put a few thousand light years at it and it will do fine.


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tim53
Postmaster
*****

Reged: 12/17/04

Loc: Highland Park, CA
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: Datapanic]
      #5936954 - 06/23/13 06:56 PM

Quote:

In the back of the garage, there's an ATM 6" OTA with everything but the mirror that I bought with a Cave 1.5" mount for a song a couple months ago. It came with a nice circle-T convertible right-angle/straight through finder that was in pretty good condition, so after cleaning it up, paint and replacing the broken cross-hairs, this one will be used for the finder instead.

It weighs in at 424g in right-angle mode and 376g in straight through mode - more than 0.5lbs lighter than the other finder!




That looks like the 8x50s we sold with the Meade newtonians in the late 70s, early 80s.

-Tim.


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tim53
Postmaster
*****

Reged: 12/17/04

Loc: Highland Park, CA
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: tim53]
      #5936955 - 06/23/13 06:57 PM

Sorry, hadn't read the subsequent posts!

-Tim.


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Datapanic
Carpal Tunnel
*****

Reged: 10/17/09

Loc: Tucson, Arizona
Re: A 1972 Cave 8" f/4.5 RFT Lightweight Deluxe new [Re: tim53]
      #5936958 - 06/23/13 07:00 PM

It's the same as the 7 and 8x50mm straight through circle-T's I've seen on the Caves except those have longer tubes and a diagonal is not an option. Wonder if Cave got them from Meade or if he bought them bulk from somewhere else...

They are nice finders - double cemented objective with a Kellner eyepiece.


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