Date   

Re: Mark Ost's 17.5" Discovery telescope

jimcoble2000
 

That brings up an interesting point about mirrors. I think it is a lot of luck in what you get. There are mirror makers with good reputations but at the end of the day like all hand worked objects it can be just how the cards dealt out. I have seen mediocre mirrors by big names and super mirrors by China factory # 16 such as Kent's superlative ten inch. No one knows who made that but I do know it is the best I have seen. Oh BTW Kent, the Blue Racquet Ball is blue...............not green! Hence the name! Now if it were the chartreuse ping ping ball we would all have to regroup.


From: "kent@..."
To: backbayastro@...
Sent: Saturday, June 16, 2012 9:09 AM
Subject: [backbayastro] Mark Ost's 17.5" Discovery telescope

 
At least for me, last night was first light of Mark Ost's new 17.5" Discovery telescope. The images were indeed satisfying. Good quality, large mirrors are hard to come by, especially at the low price points such telescopes are sold these days. I believe the mirror in Mark's telescope is possibly the best large mirror I have seen. The extrafocal diffraction rings look nearly identical on each side of focus. Most commercial mirrors sufffer from undercorrection, especially large aperture ones.

The seeeing last night was impeccable. That, combined with the fine figure of the optics accounted for the fact we could push magnification so high. As Mark mentioned in a previous post, three of us glimpsed the central star of M 57, the Ring Nebula at 700x. I am convinced seeing accounts for even more than dark skies to accomplish such a feat. Here is a case in point. When seeing is mediocre I have often not been able to see the central star using my 25" from Coinjock skies, yet when seeing is excellent I have glimpsed it fairly easily from my front yard in Virginia Beach with the same instrument.

I look forward to many nights ahead of exploring both "show objects" as well as esoteric deep sky objects with Mark's new telescope. Congradulations, Mark, on a acquiring a telescope with superb optics.

Kent Blackwell




Mark Ost's 17.5" Discovery telescope

Kent Blackwell
 

At least for me, last night was first light of Mark Ost's new 17.5" Discovery telescope. The images were indeed satisfying. Good quality, large mirrors are hard to come by, especially at the low price points such telescopes are sold these days. I believe the mirror in Mark's telescope is possibly the best large mirror I have seen. The extrafocal diffraction rings look nearly identical on each side of focus. Most commercial mirrors sufffer from undercorrection, especially large aperture ones.

The seeeing last night was impeccable. That, combined with the fine figure of the optics accounted for the fact we could push magnification so high. As Mark mentioned in a previous post, three of us glimpsed the central star of M 57, the Ring Nebula at 700x. I am convinced seeing accounts for even more than dark skies to accomplish such a feat. Here is a case in point. When seeing is mediocre I have often not been able to see the central star using my 25" from Coinjock skies, yet when seeing is excellent I have glimpsed it fairly easily from my front yard in Virginia Beach with the same instrument.

I look forward to many nights ahead of exploring both "show objects" as well as esoteric deep sky objects with Mark's new telescope. Congradulations, Mark, on a acquiring a telescope with superb optics.

Kent Blackwell


Chippokes observing pass

Greg Doughty <ki4bbl@...>
 

Hi all,
 
How can I get a pass for Chippokes?  I am a member, but have never observed there.  I am looking forward to using the new Nagler
 
Greg
ki4bbl


Green Bank

Dale Carey
 

Astronomers Luck = not to good
I wait all year to go to an event in gorgeous W.Va. skies and what is the forecast for all 4 days - you got it
cloudy, possible thunderstorms, not just for a day, but THE ENTIRE WEEK END $!@##$^&%*#@$%^*($$!@#%#^$@#$@^@$^#!%@@$#&@^!$#%^$& and put a ! behind that.
Luckily, all events are indoors but the nights are iffy - I'm going to the ABC store today and stock up.
Did I say @#$%^&*^%$#@#$%YU*(^%$#@!  ?
 
 


Chippokes pass?

Greg Doughty <ki4bbl@...>
 

Hi all,

I am going to Chippokes this evening, but I understand I need a pass.  How can I get that?  I can meet today, or a the site.  I received my Nagler 17mm last night, so I am psyched to check out what I can see!

Greg Doughty
ki4bbl


Re: three days of testing the 17.5

jimcoble2000
 

Depends on how I am doing those days. 
I will let you know later in the week. Weather dependent also!



From: Garry Mitchell
To: "backbayastro@..."
Sent: Saturday, June 16, 2012 1:32 AM
Subject: Re: [backbayastro] three days of testing the 17.5

 
Mark do you mind if me and Cassie comes over either next Friday or Saturday?  

Garry Mitchell


On Jun 16, 2012, at 12:53 AM, Mark Ost <jimcoble2000@...> wrote:

 
After three days of testing the mirror in the 17.5, Kent, Stan and I agree that it is one of the best large aperture mirrors we have seen. Under excellent seeing, the stars were very close to refactor quality. Saturn was the equal of the Takahshi image. How good a mirror and how good seeing? We all saw the central star in the ring M57. This requires excellent seeing and a fair size scope. Anytime you can do the central star in a 18 it is a good night. Sometimes the 25 can't do it. The solid tube has quite a bit of contrast as all the solid and split tube Discovery's have. Discovery has always had a reputation for very good mirrors and this one seems excellent. Far surpasses my expectation for a large mirror, actually coming close to Kent's ten inch Orion which is a superb mirror. That says a lot for an 18 inch mirror. The blue racquet ball was an intensely blue (green by Kent's beady eyes). Dark sky tonight 20.5 at it's best.
=



Re: three days of testing the 17.5

Georgie <doublestarjune@msn.com>
 

WhoooHooo! :)


On Jun 16, 2012, at 5:59 AM, Charles Jagow <chuck@...> wrote:

 

Congrats on the Discovery Mark!

Chuck Jagow
Rott'n Paws Observatory
N36:46:23.281 W076:13:31.512

From: Mark Ost <jimcoble2000@...>
Reply-To: <backbayastro@...>
Date: Saturday, June 16, 2012 12:53 AM
To: Back Bay <backbayastro@...>
Subject: [backbayastro] three days of testing the 17.5

 

After three days of testing the mirror in the 17.5, Kent, Stan and I agree that it is one of the best large aperture mirrors we have seen. Under excellent seeing, the stars were very close to refactor quality. Saturn was the equal of the Takahshi image. How good a mirror and how good seeing? We all saw the central star in the ring M57. This requires excellent seeing and a fair size scope. Anytime you can do the central star in a 18 it is a good night. Sometimes the 25 can't do it. The solid tube has quite a bit of contrast as all the solid and split tube Discovery's have. Discovery has always had a reputation for very good mirrors and this one seems excellent. Far surpasses my expectation for a large mirror, actually coming close to Kent's ten inch Orion which is a superb mirror. That says a lot for an 18 inch mirror. The blue racquet ball was an intensely blue (green by Kent's beady eyes). Dark sky tonight 20.5 at it's best.


Re: three days of testing the 17.5

charles jagow
 

Congrats on the Discovery Mark!

Chuck Jagow
Rott'n Paws Observatory
N36:46:23.281 W076:13:31.512

From: Mark Ost <jimcoble2000@...>
Reply-To: <backbayastro@...>
Date: Saturday, June 16, 2012 12:53 AM
To: Back Bay <backbayastro@...>
Subject: [backbayastro] three days of testing the 17.5

 

After three days of testing the mirror in the 17.5, Kent, Stan and I agree that it is one of the best large aperture mirrors we have seen. Under excellent seeing, the stars were very close to refactor quality. Saturn was the equal of the Takahshi image. How good a mirror and how good seeing? We all saw the central star in the ring M57. This requires excellent seeing and a fair size scope. Anytime you can do the central star in a 18 it is a good night. Sometimes the 25 can't do it. The solid tube has quite a bit of contrast as all the solid and split tube Discovery's have. Discovery has always had a reputation for very good mirrors and this one seems excellent. Far surpasses my expectation for a large mirror, actually coming close to Kent's ten inch Orion which is a superb mirror. That says a lot for an 18 inch mirror. The blue racquet ball was an intensely blue (green by Kent's beady eyes). Dark sky tonight 20.5 at it's best.


Re: three days of testing the 17.5

garry_mitchell74
 

Mark do you mind if me and Cassie comes over either next Friday or Saturday?  

Garry Mitchell


On Jun 16, 2012, at 12:53 AM, Mark Ost <jimcoble2000@...> wrote:

 

After three days of testing the mirror in the 17.5, Kent, Stan and I agree that it is one of the best large aperture mirrors we have seen. Under excellent seeing, the stars were very close to refactor quality. Saturn was the equal of the Takahshi image. How good a mirror and how good seeing? We all saw the central star in the ring M57. This requires excellent seeing and a fair size scope. Anytime you can do the central star in a 18 it is a good night. Sometimes the 25 can't do it. The solid tube has quite a bit of contrast as all the solid and split tube Discovery's have. Discovery has always had a reputation for very good mirrors and this one seems excellent. Far surpasses my expectation for a large mirror, actually coming close to Kent's ten inch Orion which is a superb mirror. That says a lot for an 18 inch mirror. The blue racquet ball was an intensely blue (green by Kent's beady eyes). Dark sky tonight 20.5 at it's best.

=


three days of testing the 17.5

jimcoble2000
 

After three days of testing the mirror in the 17.5, Kent, Stan and I agree that it is one of the best large aperture mirrors we have seen. Under excellent seeing, the stars were very close to refactor quality. Saturn was the equal of the Takahshi image. How good a mirror and how good seeing? We all saw the central star in the ring M57. This requires excellent seeing and a fair size scope. Anytime you can do the central star in a 18 it is a good night. Sometimes the 25 can't do it. The solid tube has quite a bit of contrast as all the solid and split tube Discovery's have. Discovery has always had a reputation for very good mirrors and this one seems excellent. Far surpasses my expectation for a large mirror, actually coming close to Kent's ten inch Orion which is a superb mirror. That says a lot for an 18 inch mirror. The blue racquet ball was an intensely blue (green by Kent's beady eyes). Dark sky tonight 20.5 at it's best.


Re: Cub Scout Day Camp at Elks Lodge June 28

garry_mitchell74
 

Yes that was me I am going to call her tomorrow and get more info

Garry Mitchell


On Jun 15, 2012, at 1:22 PM, "Mark" <gerlach.mark@...> wrote:

 

I have an email on this dating back to mid may. I think I heard someone else mention it at the Mt.T. Venus Transit. If anyone has been in contact with the Scouts on this, please call me on my cell, 434-4220, so we can get the info on the Calendar

=


Re: My Venus Transit Web Page

George Reynolds
 

Chuck,

Super TOV Web page!  I had to go through the whole thing, all the pics and text, though my wife was summoning me to bed.  

G3
 

George Reynolds

"Solar System Ambassador" for South Hampton Roads, Virginia
Back Bay Amateur Astronomers (BBAA) 
http://www.backbayastro.org


 


From: Chuck
To: backbayastro@...
Sent: Friday, June 15, 2012 10:30 PM
Subject: [backbayastro] My Venus Transit Web Page

 
Hey everyone! I have chronicled our Venus transit experience on a new web page. Go check it out at:

http://www.jagowds.com/_jap/vt.shtml

v/r

Chuck Jagow
Rott'n Paws Observatory




Re: Binocular FOV

George Reynolds
 

I mean Orion UltraView, not Ultra Scan.  
 

George Reynolds

"Solar System Ambassador" for South Hampton Roads, Virginia
Back Bay Amateur Astronomers (BBAA) 
http://www.backbayastro.org


 


From: George Reynolds
To: "backbayastro@..."
Sent: Friday, June 15, 2012 8:11 PM
Subject: Re: [backbayastro] Re: Binocular FOV

 
Nick, I prefer a wider FOV for finding objects.  Sometimes it is hard to locate small dim objects in my 10x50 narrow FOV binos.  My favorite binoculars are my Orion UltraScan 8x42 Wide-Field binos.  Their magnification and field of view are very close to what I have in the finder scope of my Dob.  That makes it easy to locate "target" objects in the binos (correct image), then find them in my finder scope (reversed image), then see them in the eyepiece.

George
 

George Reynolds

"Solar System Ambassador" for South Hampton Roads, Virginia
Back Bay Amateur Astronomers (BBAA) 
http://www.backbayastro.org


 


From: Paul
To: backbayastro@...
Sent: Friday, June 15, 2012 12:20 PM
Subject: [backbayastro] Re: Binocular FOV

 
I think it depends on what you want the binoculars for. My 10x50's have a 5 deg TFOV, enough to frame pretty much any object, and high enough mag for seeing many features on the Moon. The view they give me of objects like the Beehive and the Pleiades is absolutely stunning.

One thing I (everyone?) love doing with binoculars is exploring the Milky Way. This is one area where having an extremely large TFOV comes in handy. Imagine being able to look up at the sky with the unaided eye and easily see 9th magnitude stars or fainter. The bigger the FOV in your binoculars, the closer you will get to that dream view.

The times I wish I had a bigger TFOV is when I want to see things like the entire Orion belt/sword region or the area around the "belly of the swan" in Cygnus or the "steam" coming out of the teacup (I could go on and on). You could stare at these sights for hours.

--- In backbayastro@..., "nranderson_deepskyobserver" >
> When selecting a pair a binoculars, how much does the field of view matter? Why would I want a 7 degree FOV versus 5 degrees? Does the FOV affect light-gathering power? To me, any pair of binoculars is going to seem as a wide field of view since I'm used to only observing through a telescope.
>
> -Nick Anderson
>






My Venus Transit Web Page

charles jagow
 

Hey everyone! I have chronicled our Venus transit experience on a new web page. Go check it out at:

http://www.jagowds.com/_jap/vt.shtml

v/r

Chuck Jagow
Rott'n Paws Observatory


Re: Chippokes Presentation June 30 - Volunteers needed

George Reynolds
 

Mark,

The question of this Chippokes presentation came up at the May meeting, but no one knew anything about it at that time.  Having missed the June meeting I don't know if it was resolved at that time or not.  

I think I may be able to participate.  I'll call you when I get home from Michigan.  My sister-in-law and I are leaving tomorrow morning in a U-Haul truck, carrying some of the objects "inherited" by our families after the passing of my father-in-law.  (My wife Linda is staying another week.)

I should get home Sunday night.  If it's not too late, I'll talk to you then, or call you Monday.

George
 

George Reynolds

"Solar System Ambassador" for South Hampton Roads, Virginia
Back Bay Amateur Astronomers (BBAA) 
http://www.backbayastro.org


 


From: Mark
To: backbayastro@...
Sent: Friday, June 15, 2012 12:38 PM
Subject: [backbayastro] Chippokes Presentation June 30 - Volunteers needed

 
Outreach Opportunity:

Chippokes has their calendar open for us to do a presentation/viewing on June 30 around 8 pm.
The conference shelter has electricity for computer, projector, etc.
Viewing can be on the Shelter lawn or on the Mansion parking lot. (Not being familiar with this place, I don't know which would be best.)
Who is ready, willing and able to do a program? Please contact me, cell 434-4220

/\\ark G

George R.: Give me a call to get the info for the calendar.




Re: Binocular FOV

George Reynolds
 

Nick, I prefer a wider FOV for finding objects.  Sometimes it is hard to locate small dim objects in my 10x50 narrow FOV binos.  My favorite binoculars are my Orion UltraScan 8x42 Wide-Field binos.  Their magnification and field of view are very close to what I have in the finder scope of my Dob.  That makes it easy to locate "target" objects in the binos (correct image), then find them in my finder scope (reversed image), then see them in the eyepiece.

George
 

George Reynolds

"Solar System Ambassador" for South Hampton Roads, Virginia
Back Bay Amateur Astronomers (BBAA) 
http://www.backbayastro.org


 


From: Paul
To: backbayastro@...
Sent: Friday, June 15, 2012 12:20 PM
Subject: [backbayastro] Re: Binocular FOV

 
I think it depends on what you want the binoculars for. My 10x50's have a 5 deg TFOV, enough to frame pretty much any object, and high enough mag for seeing many features on the Moon. The view they give me of objects like the Beehive and the Pleiades is absolutely stunning.

One thing I (everyone?) love doing with binoculars is exploring the Milky Way. This is one area where having an extremely large TFOV comes in handy. Imagine being able to look up at the sky with the unaided eye and easily see 9th magnitude stars or fainter. The bigger the FOV in your binoculars, the closer you will get to that dream view.

The times I wish I had a bigger TFOV is when I want to see things like the entire Orion belt/sword region or the area around the "belly of the swan" in Cygnus or the "steam" coming out of the teacup (I could go on and on). You could stare at these sights for hours.

--- In backbayastro@..., "nranderson_deepskyobserver" wrote:
>
> When selecting a pair a binoculars, how much does the field of view matter? Why would I want a 7 degree FOV versus 5 degrees? Does the FOV affect light-gathering power? To me, any pair of binoculars is going to seem as a wide field of view since I'm used to only observing through a telescope.
>
> -Nick Anderson
>




Re: Chippokes Presentation June 30 - Volunteers needed

Jim Tallman
 

Mark the Mansion parking lot is our normal observation site and best know to those who go out there.  I might be able to make this to help with observing.  Find a presenter and we are good J

 

 

Jim

 

From: backbayastro@... [mailto:backbayastro@...] On Behalf Of Mark
Sent: Friday, June 15, 2012 12:38 PM
To: backbayastro@...
Subject: [backbayastro] Chippokes Presentation June 30 - Volunteers needed

 

 

Outreach Opportunity:

Chippokes has their calendar open for us to do a presentation/viewing on June 30 around 8 pm.
The conference shelter has electricity for computer, projector, etc.
Viewing can be on the Shelter lawn or on the Mansion parking lot. (Not being familiar with this place, I don't know which would be best.)
Who is ready, willing and able to do a program? Please contact me, cell 434-4220

/\\ark G

George R.: Give me a call to get the info for the calendar.


Re: On line star charts

garry_mitchell74
 

Thanks Bob 

Garry Mitchell


On Jun 15, 2012, at 11:38 AM, "bob414" <bob414@...> wrote:

 

You can try searching for “triatlas”, they have sky charts.  I think in three different resolutions, free in pdf format.  If you can’t get them,  I think I still have them on my computer.

\

Bob

 

From: backbayastro@... [mailto:backbayastro@...] On Behalf Of Garry Mitchell
Sent: Wednesday, June 13, 2012 3:56 AM
To: backbayastro@...
Subject: [backbayastro] On line star charts

 

 

I used to have a link to star charts that were great I had two sets one was like sky atlas and the other was like urcromica 2000 for can't spell too good! What was the link at and how do I find them again thanks.

Garry Mitchell

=


Cub Scout Day Camp at Elks Lodge June 28

gerlach.mark
 

I have an email on this dating back to mid may. I think I heard someone else mention it at the Mt.T. Venus Transit. If anyone has been in contact with the Scouts on this, please call me on my cell, 434-4220, so we can get the info on the Calendar


Outreach Opportunity - VASC

gerlach.mark
 

All:
Parrish Crosby of Va. Air & Space Ctr in Hampton, is asking to have a few scopes for a large group (300-350) from Lincoln Military Housing Group on July 14 from 8pm - 10:30 pm. (Yes, I know, same date as the picnic, but this is PM.)
No presentation is requested, scopes can be set up on the 3rd level, before the stairs to the observation deck. I have told him I would be there, and there is at least one person coming from the VPAS group.

Anyone interested? Call me at 434-4220

/&#92;&#92;ark G.

15921 - 15940 of 53817