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Equipment Discussions >> Equipment

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MikeBOKC
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Loc: Oklahoma City, OK
A new way to look at aperture
      #5707703 - 03/01/13 07:46 PM

So like most here I have suffered from aperturitis at times. One possible treatment is to look at our available aperture in total . . . so I grabbed the calculator and found that I have in my garage a grand total of 33 inches of aperture! Now if they just made a quinto-viewer . . .

What's your total aperture? See, it can be reassuring!


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Doc Willie
Pooh-Bah
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Reged: 03/31/10

Loc: Mid-Hudson Valley, NY, USA
Re: A new way to look at aperture new [Re: MikeBOKC]
      #5707780 - 03/01/13 08:54 PM

Is that square inches? If not, this is a flawed way to sum aperture. Five 2 inches do not equal one 10 inch diameter.

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Goodchild
scholastic sledgehammer
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Reged: 12/31/08

Re: A new way to look at aperture new [Re: Doc Willie]
      #5707956 - 03/01/13 11:17 PM

Sure it does. We're talking about aperture, not area. Besides, the OP is trying (I assume) to introduce a somewhat lighthearted thread to determine how many scopes/optics one has.

37 for me.

Edited by Goodchild (03/01/13 11:40 PM)


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korborh
professor emeritus
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Reged: 01/29/11

Re: A new way to look at aperture new [Re: Goodchild]
      #5707982 - 03/01/13 11:35 PM

19 ... still a teenager

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cheapersleeper
Carpal Tunnel
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Reged: 01/22/10

Loc: Sachse TX
Re: A new way to look at aperture new [Re: korborh]
      #5708111 - 03/02/13 02:16 AM

36!!!

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GlennLeDrew
Postmaster
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Reged: 06/18/08

Loc: Ottawa, Ontario, Canada
Re: A new way to look at aperture new [Re: cheapersleeper]
      #5708114 - 03/02/13 02:20 AM

2 * 2" + 2 * 2.4" + 2 * 4" = 16.8".

They might be midgets, but at least binoculars automatically double up!


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Jon Isaacs
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Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: A new way to look at aperture new [Re: GlennLeDrew]
      #5708232 - 03/02/13 06:34 AM

An interesting way to look at things. A rough calculation is 130 inches of aperture and somewhere around 24 scopes, some quite large, most small.

Binoculars not included.

Jon

Edited by Jon Isaacs (03/02/13 06:40 AM)


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Startraffic
professor emeritus
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Reged: 02/12/06

Loc: Lat. 39.143345, Long. -77.1748...
Re: A new way to look at aperture new [Re: Jon Isaacs]
      #5708249 - 03/02/13 07:11 AM

Hmmm,
14.5"Folded Newt+10"SNT+8"Newt+6"Newt+6"RC+3.54"(90mmETX)Cat+6"Acro=54.54"
How about this 360.35sqin of aperture?

Clear Dark Skies
Startraffic
39.138274 -77.168898


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City Kid
Carpal Tunnel
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Reged: 05/06/09

Loc: Northern Indiana
Re: A new way to look at aperture new [Re: MikeBOKC]
      #5708253 - 03/02/13 07:21 AM

970.85mm. Or in inches that would be 38.2" but it sounds more impressive in mm.

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Ed D
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Reged: 04/30/10

Loc: Sunny South Florida
Re: A new way to look at aperture new [Re: City Kid]
      #5708281 - 03/02/13 07:53 AM

I thought this might be interesting so I added up the aperture of my current scopes.
WOW, was it depressing!
So, I added the aperture of the Dob I'm currently building.
Guess what? Now I'm really depressed.

Not really, I'm actually very happy with what I have. But so far I take the prize for least total aperture.

Ed D


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ahopp
sage


Reged: 05/24/12

Re: A new way to look at aperture new [Re: City Kid]
      #5708286 - 03/02/13 08:02 AM

1013.71(39.91") includes my L glass canon lenses, they cost more than a good APO so I'm count'n 'm.

Tony


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starrancher
Carpal Tunnel
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Reged: 06/09/09

Loc: Northern Arizona
Re: A new way to look at aperture new [Re: Ed D]
      #5708317 - 03/02/13 08:29 AM

Quote:

I thought this might be interesting so I added up the aperture of my current scopes.
WOW, was it depressing!
So, I added the aperture of the Dob I'm currently building.
Guess what? Now I'm really depressed.

Not really, I'm actually very happy with what I have. But so far I take the prize for least total aperture.

Ed D




So ,.... What's the total Ed ?


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starrancher
Carpal Tunnel
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Reged: 06/09/09

Loc: Northern Arizona
Re: A new way to look at aperture new [Re: starrancher]
      #5708336 - 03/02/13 08:45 AM

AR5 = 5"
SN8 = 8"
11TE= 4.5"
7T = 2.4"
66TE= 2"
Total = 21.9"

Modest yes , but with the awesome rural northern Arizona skies , it's unreal what an 8" scope will pull .

Oh , I forgot my 10x50s . That adds another 4" !
So I guess that kicks me up to a grand total of 25.9" .


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Martin Lyons
sage
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Reged: 10/06/08

Loc: Cape Town, South Africa
Re: A new way to look at aperture new [Re: starrancher]
      #5708345 - 03/02/13 08:49 AM

Roughly, 52"

Oops forgot the 16" GSO and the 12" Cass.

Make that 80"

Edited by Martin Lyons (03/02/13 08:52 AM)


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starrancher
Carpal Tunnel
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Reged: 06/09/09

Loc: Northern Arizona
Re: A new way to look at aperture new [Re: starrancher]
      #5708351 - 03/02/13 08:52 AM

Do you have a pict of that folded Newt John ?

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rathbaster
scholastic sledgehammer
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Reged: 03/21/08

Loc: East Bridgewater, MA
Re: A new way to look at aperture new [Re: starrancher]
      #5708368 - 03/02/13 09:09 AM

20" in four scopes.
I never realized....


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MikeBOKC
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Reged: 05/10/10

Loc: Oklahoma City, OK
Re: A new way to look at aperture new [Re: rathbaster]
      #5708385 - 03/02/13 09:26 AM

Yes folks this is strictly for fun . . . just thought it might be a hoot sometime in conversation to say "16 inch Dob? That's nothing! I got 33 inches of aperture at home!"

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catboat
sage
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Reged: 12/01/09

Loc: Maine
Re: A new way to look at aperture new [Re: MikeBOKC]
      #5708734 - 03/02/13 12:33 PM

It's a bit embarrassing. If I include unmounted optics… 127"


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Mark Costello
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Reged: 03/08/05

Loc: Matthews, NC, USA
Re: A new way to look at aperture new [Re: Ed D]
      #5708840 - 03/02/13 01:26 PM

I'm happy right now with the job my 5" aperture is doing for me...

Again, not counting binoculars....


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zjc26138Moderator
Loved By All
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Reged: 02/24/05

Loc: Mingo Junction, Ohio
Re: A new way to look at aperture new [Re: Mark Costello]
      #5708848 - 03/02/13 01:34 PM

15" of usable aperture for me.

If you count my TMB and AR5, both cells are currently out of their tubes,then I have 25" of aperture.


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JayinUT
I'm not Sleepy
*****

Reged: 09/19/08

Loc: Utah
Re: A new way to look at aperture new [Re: zjc26138]
      #5708923 - 03/02/13 02:30 PM

28 inches with 4 scope.

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EFT
Vendor - Deep Space Products
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Reged: 05/07/07

Loc: Phoenix, AZ
Re: A new way to look at aperture new [Re: JayinUT]
      #5708966 - 03/02/13 03:04 PM

About 79" with 13 scopes. Woof. More than I thought and I keep remembering one more every time I think I have them all. Probably time to thin that down a bit.

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George N
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Reged: 05/19/06

Loc: Binghamton & Indian Lake NY
Re: A new way to look at aperture new [Re: zjc26138]
      #5709053 - 03/02/13 04:03 PM

If I add up the total aperture that I can actually *use* under my endlessly cloudy and snowy skies, the answer is zero! ….at least lately.

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coopman
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Reged: 04/23/06

Loc: South Louisiana
Re: A new way to look at aperture new [Re: George N]
      #5709083 - 03/02/13 04:18 PM

41.7 inches from my 7 scopes.

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GeneT
Ely Kid
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Reged: 11/07/08

Loc: South Texas
Re: A new way to look at aperture new [Re: MikeBOKC]
      #5709256 - 03/02/13 06:04 PM

Since the human pupil has a focal length of 17 mm, it is f/2.4 and yields 0.17 per mm of aperture. About 2.5 mm is
the photopic (light-adapted) diameter of the eye. I own a 12.5 inch (if I figured correctly, about 318mm) , F5 telescope. That's a lot of eyeballs.


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GeneT
Ely Kid
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Reged: 11/07/08

Loc: South Texas
Re: A new way to look at aperture new [Re: starrancher]
      #5709261 - 03/02/13 06:06 PM

Quote:

with the awesome rural northern Arizona skies , it's unreal what an 8" scope will pull.




I hear you. I grew up in Ely, Nevada. Mag 6.5 skies out my back door.


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CounterWeight
Postmaster
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Reged: 10/05/08

Loc: Palo alto, CA.
Re: A new way to look at aperture new [Re: GeneT]
      #5709719 - 03/02/13 11:08 PM

~453 mm's here! That to me really sounds large! thanks for the post, I no longer have apeture fever

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FirstSight
Duke of Deneb
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Reged: 12/26/05

Loc: Raleigh, NC
Re: A new way to look at aperture new [Re: zjc26138]
      #5710322 - 03/03/13 10:37 AM

305mm + 101.7mm + 90mm = 496.7mm = 19.55 inches diameter

Another fun, though similarly arbitrary, useless stat would be how many total mm of focal-length our eyepiece collection has.
Naglers: 119 mm
Panoptics: 24mm
Ethos: 83.4mm
TOTAL: 226.4mm = 8.9 in.

I fear to calculate the average cost of those eyepieces per focal-length inch. Easily way more than the cost of my scopes per focal-length inch.

Edited by FirstSight (03/03/13 10:39 AM)


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tclehman1969
sage
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Reged: 05/18/10

Loc: SF Bay Area, California
Re: A new way to look at aperture new [Re: CounterWeight]
      #5710523 - 03/03/13 12:07 PM

Hmmm....lets see...
203.2, 90, 80, 80x2=160, 50x2=100, or 24.92" of aperture! More than some, less than others, but I am totally thrilled with what I have!


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nevy
professor emeritus
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Reged: 02/07/12

Loc: UK
Re: A new way to look at aperture new [Re: tclehman1969]
      #5710572 - 03/03/13 12:42 PM

11" + 12" + 16" = 39"

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Patrik Iver
professor emeritus


Reged: 07/29/03

Loc: Kaarina, Finland
Re: A new way to look at aperture new [Re: tclehman1969]
      #5710580 - 03/03/13 12:44 PM

Scary exercise...

7 telescopes totalling 1054 mm (41.5"), 10 binoculars totalling 818 mm (32.2") and one 80 mm spotting scope (3.1").

And one 105 mm (4.1") refractor on order...

I think I need help...

I didn't count the optics I've given other family members, and I also left out one tiny 21 mm (0.8") monocular.


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Patrik Iver
professor emeritus


Reged: 07/29/03

Loc: Kaarina, Finland
Re: A new way to look at aperture new [Re: Patrik Iver]
      #5710585 - 03/03/13 12:47 PM

Quote:

Scary exercise...

7 telescopes totalling 1054 mm (41.5"), 10 binoculars totalling 818 mm (32.2") and one 80 mm spotting scope (3.1").

And one 105 mm (4.1") refractor on order...

I think I need help...

I didn't count the optics I've given other family members, and I also left out one tiny 21 mm (0.8") monocular.




Please tell me that the fact that this bunch of optics resides at four different locations makes the collection completely acceptable and normal...


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Goodchild
scholastic sledgehammer
*****

Reged: 12/31/08

Re: A new way to look at aperture new [Re: Patrik Iver]
      #5710759 - 03/03/13 02:34 PM

Quote:

Quote:

Scary exercise...

7 telescopes totalling 1054 mm (41.5"), 10 binoculars totalling 818 mm (32.2") and one 80 mm spotting scope (3.1").

And one 105 mm (4.1") refractor on order...

I think I need help...

I didn't count the optics I've given other family members, and I also left out one tiny 21 mm (0.8") monocular.




Please tell me that the fact that this bunch of optics resides at four different locations makes the collection completely acceptable and normal...





No, it doesn't.


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ThreeD
Pooh-Bah


Reged: 12/23/08

Loc: Sacramento suburbs
Re: A new way to look at aperture new [Re: Goodchild]
      #5711018 - 03/03/13 05:07 PM

2 dobs + 2 RACI finders = 28.3". Those two finders gave me an extra 4.3"!

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cavefrog
Carpal Tunnel
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Reged: 11/11/08

Loc: loozyanna
Re: A new way to look at aperture new [Re: ThreeD]
      #5711625 - 03/03/13 10:16 PM

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


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Tom Clark
professor emeritus
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Reged: 11/14/07

Loc: North of Deming, NM
Re: A new way to look at aperture new [Re: cavefrog]
      #5712069 - 03/04/13 08:26 AM

93" total. Never thought of this before!

I like to build scopes, and recently moved to near perfect skies.

5,6,16,24,42


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neotesla
Pooh-Bah
*****

Reged: 11/18/10

Loc: Canada
Re: A new way to look at aperture new [Re: Tom Clark]
      #5712123 - 03/04/13 09:06 AM

Feeling small after Mr. Clarks total... 810mm or ~32".

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Ed D
Carpal Tunnel
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Reged: 04/30/10

Loc: Sunny South Florida
Re: A new way to look at aperture new [Re: starrancher]
      #5712135 - 03/04/13 09:20 AM

Quote:

Quote:

I thought this might be interesting so I added up the aperture of my current scopes.
WOW, was it depressing!
So, I added the aperture of the Dob I'm currently building.
Guess what? Now I'm really depressed.

Not really, I'm actually very happy with what I have. But so far I take the prize for least total aperture.

Ed D




So ,.... What's the total Ed ?




6.0" f/8 tube Dob
2.9" f/6 refractor

Current total = 8.9"

Include 5.9" f/8 open truss Dob in progress

Near future total = 14.8"

After reading some of the later posts I see that I no longer take the prize for least aperture!

Ed D


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csrlice12
Postmaster
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Reged: 05/22/12

Loc: Denver, CO
Re: A new way to look at aperture new [Re: Goodchild]
      #5712144 - 03/04/13 09:28 AM

Quote:

Quote:

Quote:

Scary exercise...

7 telescopes totalling 1054 mm (41.5"), 10 binoculars totalling 818 mm (32.2") and one 80 mm spotting scope (3.1").

And one 105 mm (4.1") refractor on order...

I think I need help...

I didn't count the optics I've given other family members, and I also left out one tiny 21 mm (0.8") monocular.




Please tell me that the fact that this bunch of optics resides at four different locations makes the collection completely acceptable and normal...





No, it doesn't.




"I asked you not to tell me that"--Maxwell Smart....


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Tim Gilliland
professor emeritus


Reged: 03/28/09

Loc: Sand Springs Okla.
Re: A new way to look at aperture new [Re: csrlice12]
      #5712157 - 03/04/13 09:40 AM

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.

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bilgebay
Post Laureate
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Reged: 11/06/08

Loc: Türkiye - Istanbul and Marmar...
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
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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
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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
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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
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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
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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
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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
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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
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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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