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don clement
Vendor (Clement Focuser)


Reged: 02/02/11

Loc: Running Springs, California
Clement Focuser on Hale 200 inch Telescope
      #5917315 - 06/12/13 04:35 PM

Last month a Clement focuser (3" Bellerophon III model with RoboFocus motor and controller) was used with FocusMax software to successfully autofocus and image using an Apogee D7 camera at prime focus F/3.3 on the Palomar Hale 200 inch telescope. The focuser was mounted just above the Wynne corrector and there was very little back focus available, also travel of 25mm was required. The ultra-low profile [1"] and long travel [1.25"] of the Clement Focuser met these stringent requirements. An ultralow adapter allowed the Apogee D7 camera to be mounted flush with the Clement Focuser top plate. Shown below is the Clement Focuser in the 200" prime focus cage.



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don clement
Vendor (Clement Focuser)


Reged: 02/02/11

Loc: Running Springs, California
Re: Clement Focuser on Hale 200 inch Telescope new [Re: don clement]
      #5917317 - 06/12/13 04:37 PM



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don clement
Vendor (Clement Focuser)


Reged: 02/02/11

Loc: Running Springs, California
Re: Clement Focuser on Hale 200 inch Telescope new [Re: don clement]
      #5917329 - 06/12/13 04:45 PM

M51 taken with Apogee A7 camera on Clement Focuser at prime focus F/3.3 Hale 200inch Telescope



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Billydee
professor emeritus
*****

Reged: 01/23/08

Loc: Winter Haven, FL
Re: Clement Focuser on Hale 200 inch Telescope new [Re: don clement]
      #5917366 - 06/12/13 05:09 PM

Don,

Must be nice to have a 200 inch scope. I guess size does matter !

Very nice, Bill


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don clement
Vendor (Clement Focuser)


Reged: 02/02/11

Loc: Running Springs, California
Re: Clement Focuser on Hale 200 inch Telescope new [Re: Billydee]
      #5917387 - 06/12/13 05:25 PM

Quote:


Must be nice to have a 200 inch scope. I guess size does matter !






George Ellery Hale also thought size mattered.


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Mike B
Starstruck
*****

Reged: 04/06/05

Loc: shake, rattle, & roll, CA
Re: Clement Focuser on Hale 200 inch Telescope new [Re: don clement]
      #5917585 - 06/12/13 07:36 PM

Gorgeous shot!

I saw that from my backyard. Well, uhh, i "saw" it... didn't look remotely LIKE that.

Inquiring mimes wanna know- what was the exposure time on that shot? How 'bout max FoV capture?


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frolinmod
Carpal Tunnel


Reged: 08/06/10

Loc: Southern California
Re: Clement Focuser on Hale 200 inch Telescope new [Re: Mike B]
      #5917614 - 06/12/13 07:52 PM

Don, you've hit the big time. Big telescope that is.

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don clement
Vendor (Clement Focuser)


Reged: 02/02/11

Loc: Running Springs, California
Re: Clement Focuser on Hale 200 inch Telescope new [Re: frolinmod]
      #5917627 - 06/12/13 08:04 PM

Nobody else's focuser could meet the requirements of one inch profile with inch and quarter focuser travel and no part of the focuser protruding below the base that would contact the Wynne corrector.

Don Clement


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Pinbout
Postmaster
*****

Reged: 02/22/10

Loc: nj
Re: Clement Focuser on Hale 200 inch Telescope new [Re: don clement]
      #5917631 - 06/12/13 08:06 PM

Congrats on such a high profile job.

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Jon Isaacs
Postmaster
*****

Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: Clement Focuser on Hale 200 inch Telescope new [Re: don clement]
      #5918242 - 06/13/13 06:14 AM

Quote:

Nobody else's focuser could meet the requirements of one inch profile with inch and quarter focuser travel and no part of the focuser protruding below the base that would contact the Wynne corrector.

Don Clement




Don:

That is totally awesome...

Jon


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Raginar
Postmaster
*****

Reged: 10/19/10

Loc: Rapid CIty, SD
Re: Clement Focuser on Hale 200 inch Telescope new [Re: Jon Isaacs]
      #5918828 - 06/13/13 01:44 PM

That's awesome Don! Congrat's!

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mattflastro
Vendor - Astrovideo Systems


Reged: 07/31/09

Loc: Brevard County , FL
Re: Clement Focuser on Hale 200 inch Telescope new [Re: don clement]
      #5918937 - 06/13/13 02:45 PM

Quote:

Nobody else's focuser could meet the requirements of one inch profile with inch and quarter focuser travel and no part of the focuser protruding below the base that would contact the Wynne corrector.

Don Clement




That scope looks huge and it's "only" a 5m . Did you assist with the installation ?


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RAKing
Postmaster
*****

Reged: 12/28/07

Loc: West of the D.C. Nebula
Re: Clement Focuser on Hale 200 inch Telescope new [Re: don clement]
      #5920094 - 06/14/13 07:33 AM

Needless to say - WOW!

Congrats on a great installation and a remarkable image.

Ron


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herrointment
Post Laureate
*****

Reged: 03/12/11

Loc: North of Hwy. 64
Re: Clement Focuser on Hale 200 inch Telescope new [Re: RAKing]
      #5923699 - 06/16/13 12:28 PM

That's one enormous feather for your hat.

Congratulations!


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rainycityastro
professor emeritus
*****

Reged: 03/29/10

Loc: Seattle, WA
Re: Clement Focuser on Hale 200 inch Telescope new [Re: herrointment]
      #5932390 - 06/21/13 12:49 AM

Don, that's one phenomenal image with a very impressive focuser (I have one) I'd love to know how long that image was. Wont be surprised at all if the integration times weren't that long.

I met the gentleman in the picture at AIC 2012. He works at Palomar and is an accomplished imager.

Regards,
--Ram


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orlyandico
Postmaster
*****

Reged: 08/10/09

Loc: Singapore
Re: Clement Focuser on Hale 200 inch Telescope new [Re: rainycityastro]
      #5932496 - 06/21/13 03:20 AM

that image is probably a few minutes. what i've seen from the literature is that most professional observations with ground-based telescopes (which are almost all spectroscopic) are with short (<10 minute) exposures. they're going for a huge number of observations, so they need to keep them short.

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ScottAz
Fleet Navigator
*****

Reged: 02/06/05

Loc: Kenosha, Wisconsin
Re: Clement Focuser on Hale 200 inch Telescope new [Re: orlyandico]
      #5935395 - 06/22/13 09:30 PM

That is totaly cool!

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faackanders2
Carpal Tunnel


Reged: 03/28/11

Re: Clement Focuser on Hale 200 inch Telescope new [Re: don clement]
      #5935520 - 06/22/13 10:52 PM

Quote:

M51 taken with Apogee A7 camera on Clement Focuser at prime focus F/3.3 Hale 200inch Telescope






WOW! Is this more detailed than Hubble?


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don clement
Vendor (Clement Focuser)


Reged: 02/02/11

Loc: Running Springs, California
Re: Clement Focuser on Hale 200 inch Telescope [Re: orlyandico]
      #5936451 - 06/23/13 01:57 PM

Exposure time is mostly dependent on F ratio, not the size of the scope. The Hale 200" at prime focus is a fast F/3.3. See Dave Erickson's http://hbastro.com/FastAstrographConsideratoins.pdf. The amazing thing about the M51 image to me is that it was taken during the Full moon.

BTW Dave Erickson has four of my focusers including his 8" F/2.6 astrograph that is focused by moving a 10" asphere mirror using a Clement center drive focuser.

Don Clement


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Chucke
member


Reged: 03/12/10

Re: Clement Focuser on Hale 200 inch Telescope [Re: don clement]
      #5938334 - 06/24/13 04:34 PM

Hi Don,

Do you know what project this was for? I am curious because I recently read they were using CCDAutoPilot with the 200" and having some difficulty specifying a long enough focal length.

Chuck


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