Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Equipment

Pages: 1 | 2 | 3 | (show all)
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.

Post Extras: Print Post   Remind Me!   Notify Moderator  
EFT
Vendor - Deep Space Products
*****

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.

Post Extras: Print Post   Remind Me!   Notify Moderator  
George N
Carpal Tunnel
*****

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.

Post Extras: Print Post   Remind Me!   Notify Moderator  
coopman
Post Laureate
*****

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.

Post Extras: Print Post   Remind Me!   Notify Moderator  
GeneT
Ely Kid
*****

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.


Post Extras: Print Post   Remind Me!   Notify Moderator  
GeneT
Ely Kid
*****

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.


Post Extras: Print Post   Remind Me!   Notify Moderator  
CounterWeight
Postmaster
*****

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

Post Extras: Print Post   Remind Me!   Notify Moderator  
FirstSight
Duke of Deneb
*****

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)


Post Extras: Print Post   Remind Me!   Notify Moderator  
tclehman1969
sage
*****

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!


Post Extras: Print Post   Remind Me!   Notify Moderator  
nevy
professor emeritus
*****

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"

Post Extras: Print Post   Remind Me!   Notify Moderator  
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.


Post Extras: Print Post   Remind Me!   Notify Moderator  
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...


Post Extras: Print Post   Remind Me!   Notify Moderator  
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.


Post Extras: Print Post   Remind Me!   Notify Moderator  
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"!

Post Extras: Print Post   Remind Me!   Notify Moderator  
cavefrog
Carpal Tunnel
*****

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.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Tom Clark
professor emeritus
*****

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


Post Extras: Print Post   Remind Me!   Notify Moderator  
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".

Post Extras: Print Post   Remind Me!   Notify Moderator  
Ed D
Carpal Tunnel
*****

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


Post Extras: Print Post   Remind Me!   Notify Moderator  
csrlice12
Postmaster
*****

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....


Post Extras: Print Post   Remind Me!   Notify Moderator  
Tim Gilliland
professor emeritus


Reged: 03/28/09

Loc: Sand Springs Okla.
Re: A new way to look at aperture [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.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | 3 | (show all)


Extra information
3 registered and 17 anonymous users are browsing this forum.

Moderator:  zjc26138, tecmage, rflinn68 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 2180

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics