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Equipment Discussions >> Equipment

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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Turkiye - Istanbul and Marmari...
Re: A new way to look at aperture new [Re: Tim Gilliland]
      #5713850 - 03/05/13 04:28 AM

71" and 12 scopes. Haven't included the camera lenses, monoculars and binoculars I have

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StarStuff1
Post Laureate
*****

Reged: 04/01/07

Loc: South of the Mason-Dixon Line
Re: A new way to look at aperture new [Re: bilgebay]
      #5716383 - 03/06/13 01:23 PM

22 scopes for a total of 85.4 inches. Also not counting any binos or camera lens. But wait, I need to add a half dozen 50mm finder scopes so the new total would 93.4 inches.

Edited by StarStuff1 (03/06/13 03:52 PM)


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csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: A new way to look at aperture new [Re: StarStuff1]
      #5716409 - 03/06/13 01:33 PM

depends if you go by the mm size of the eyepiece, or the size of the lens (i.e. 5mm XW, the main lens is a LOT bigger then 5mm)....

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Dan Finnerty
sage


Reged: 09/11/11

Loc: Pasadena, CA
Re: A new way to look at aperture new [Re: Tim Gilliland]
      #5716830 - 03/06/13 04:51 PM

Quote:

35" in 5 scopes. Guess that means an average of 7 " aperture. Not bad considering they range from a 40mm PST to a 17.5 dob. I'am sorry but I really like doing averages.




OK, so you gave us the mean, what is the median?


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Jim Curry
Pooh-Bah
*****

Reged: 10/29/07

Loc: STL
Re: A new way to look at aperture new [Re: Dan Finnerty]
      #5717109 - 03/06/13 07:23 PM

27.5" in built refactors; 19" waiting for construction.
Where's this stuff come from??

Jim


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GeneT
Ely Kid
*****

Reged: 11/07/08

Loc: South Texas
Re: A new way to look at aperture new [Re: cavefrog]
      #5717484 - 03/06/13 10:54 PM

Quote:

doe! aawwwww, now I gotta cipher too? thats too much work...brain hurts.




Too many telescopes?


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Thomas Karpf
Carpal Tunnel


Reged: 02/09/09

Loc: Newington, CT
Re: A new way to look at aperture new [Re: GeneT]
      #5720466 - 03/08/13 12:46 PM

8" reflector, 6" AT6RC, 3.5" ETX90, 2.4" refractor, 2x 2.4" (binoculars)

24.7"


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Alvin Huey
Carpal Tunnel
*****

Reged: 10/18/05

Loc: NorCal
Re: A new way to look at aperture new [Re: Thomas Karpf]
      #5720517 - 03/08/13 01:14 PM

I know someone with 76" of aperture with just two telescopes.

My good friend, Jimi, has a 48" reflector in his observatory and a 28" travel scope.

He has a couple tiny apos, but those don't count. In fact he has a TV NP-101 mounted on his upper cage of his 48" as a counterweight (scroll to bottom).

And darn, my two scopes is 52"...not even close to Jimi. 30" f/4.3 Starmaster and 22" f/4.0 reflector. I also have a couple little refractors too. 6" triplet and 4" doublet.



Here is a new way of looking at it...
Take the AREA of your scopes, add them and look at the combined aperture.

For Jimi, he has 55.6" combined aperture by area (only the two reflectors).
I have only 37.2" of combined aperture by area. (only the two reflectors)
.

And taking the last poster's (Tom K) scopes, he has 11.4" combined aperture


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bryguy27007
super member
*****

Reged: 03/09/09

Loc: Minnesota
Re: A new way to look at aperture new [Re: Alvin Huey]
      #5721399 - 03/08/13 11:50 PM

Quote:

I know someone with 76" of aperture with just two telescopes.

My good friend, Jimi, has a 48" reflector in his observatory and a 28" travel scope.

He has a couple tiny apos, but those don't count. In fact he has a TV NP-101 mounted on his upper cage of his 48" as a counterweight (scroll to bottom).




"I'm turning the collimation bolts with a 1" ratchet, while Jimi is looking the Glatter TuBlug with his binoculars"
This gave me a good chuckle. That's quite a huge scope. I'm amazed that he got that 22" in that VW as well, no small feat.

I have 10" of aperture from one telescope. Already have aperture fever and I haven't even looked through this one yet, .


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jacktechie
super member
*****

Reged: 03/20/08

Loc: SF Bay Area
Re: A new way to look at aperture new [Re: bryguy27007]
      #5721485 - 03/09/13 01:05 AM

57.9" among 8 scopes.
Jack


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jerwin
scholastic sledgehammer
*****

Reged: 05/17/12

Loc: Romeoville IL
Re: A new way to look at aperture new [Re: jacktechie]
      #5721498 - 03/09/13 01:20 AM

41.5 if binoculars count as 2x the aperture.

Jim


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Jon Isaacs
Postmaster
*****

Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: A new way to look at aperture new [Re: Alvin Huey]
      #5721859 - 03/09/13 09:24 AM

Quote:

Here is a new way of looking at it...
Take the AREA of your scopes, add them and look at the combined aperture.

For Jimi, he has 55.6" combined aperture by area (only the two reflectors).
I have only 37.2" of combined aperture by area. (only the two reflectors)




Alvin:

Interesting, that's the single aperture which would provide the equivalent area of all one's scopes. That's the square root of the sum of the squares of the apertures.

That is a more realistic approach in that it does not over estimate importance of smaller scopes but it doesn't over estimate the importance of aperture the way just summing the aperture does.

All my scopes add up to 39.3 inches, my 4 largest (two 12.5s, a 16 and a 25) come out to 34.5 inches.

Jon


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