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 Post subject: Fun with big binos
PostPosted: Sun Sep 21, 2008 5:43 pm 
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I spent a good amount of time taking apart some big binos last week and re-gluing the prisms. Previously, they wouldn't hold alignment very well, but upon disassembling them, I found that the glue that had originally been used on the prisms was cracked, so they were moving around freely- and the alignment screws by themselves wouldn't hold them in place. After re-gluing everything, I got them all aligned. As luck would have it, Kate and I went to dark skies up at her parents place this weekend. I only brought the binos, and my 65mm spotter, so the binos got a lot of observing time. I handheld them much of the time, but for deep sky, I mounted them on the Trekkpod, and sat in a comfy chair to view. While the binos pushed the mount to the limit, the Trekkpod held them fairly still after a few seconds of the shakes. We viewed M31, The Double Cluster, a tiny M57, M13, and a ton of objects in Sagittarius. M31 is just amazing in 80mm binos- maybe better than it looks in my 16" dob. Starfields look incredible too, and I enjoyed spending time on individual stars, noting the color variances. Antares may be my favorite "binocular star"- it's just blood red. During the day, we viewed the moon, as well as a few deer, and lots of birds, trees, and mountains. A fun weekend! :cool:

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Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
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PostPosted: Sun Sep 21, 2008 9:38 pm 
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star

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Erik, do you think you can fix my Orion 7x50's??? the objective is out of alignment...from a drop that i can tell (not by me, but by someone who I loaned them too)...

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PostPosted: Mon Sep 22, 2008 4:41 am 
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Erik, awesome that you were able to set the prisms and align them!

Big binos are one of those specialty instruments that often make you ask yourself, "Why did I buy a pair of binos that really need to be mounted to be used to their potential?" And then you look through them under dark skies, "Oh yeah, that's what I'm talking about!"

I think 80mm+ binos are the best instruments for viewing all of the large and bright DSO's. Under mV 6.0 skies, or better, M31, M41, M44, M45, M7, h/Chi Persei, M81/82, the "sword" of Orion, and just about any area scanned in the summer Milkyway is a sight unmatched by higher power insturments, or smaller binos. I'd say these binos are niche instruments that fill their niche very well.

Question, Erik, what other tripods do you own? I notice you used the Trekpod, no doubt because it is small and super portable, and I know how much you love that little guy. But I imagine it really isn't the best for mounting a 20x80 bino. I'm admittedly a bit obsessive about steady views, thus my curiosity.

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Last edited by Chopin on Mon Sep 22, 2008 6:43 am, edited 1 time in total.

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 Post subject:
PostPosted: Mon Sep 22, 2008 5:28 am 
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molecule
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Congrats on getting the binos working Erik. I had given up on them months ago. So how would you describe their performance now that you've got the guts lined up?


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PostPosted: Mon Sep 22, 2008 1:07 pm 
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Nice job...you are a real surgeon Erik...
Would'nt dream of doing that meself...

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PostPosted: Mon Sep 22, 2008 6:46 pm 
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Stacy Jo wrote:
Erik, do you think you can fix my Orion 7x50's??? the objective is out of alignment...from a drop that i can tell (not by me, but by someone who I loaned them too)...
If the objective is really out of alignment, it's unlikely anything can be done to fix them, as most small bino objectives have no collimation adjustments. But it's more likely that the prisms are simply misligned, and that's a fairly easy adjustment. There are screws near the top of the body, often hidden under the rubber armor that covers the binos. So you may have to pry up the edges to access the screws. Once you access the screws, a tiny screwdriver (usually a flathead) is needed to make the adjustments. I've used a laser to align binos, but, IMO, the easiest way is to simply look through them at something that will show the misalignment obviously- like a telephone pole 100 feet away, and turn the screws until the images merge. Once you do that, you can check at night on stars to verify that they're well aligned. Since stars are point sources, our eyes can't accomodate for much misalignment like they may be able to on certain objects during the day.

If you don't feel comfortable about trying to adjust them yourself, I could take a look at them for you. But I'm only going to be in California for a few more weeks, so it would have to be soon. PM me. :)

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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PostPosted: Mon Sep 22, 2008 6:59 pm 
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Gary wrote:
Congrats on getting the binos working Erik. I had given up on them months ago. So how would you describe their performance now that you've got the guts lined up?
Thanks Gary- I'd almost given up on them too, until a friend suggested that the prisms may have simply come unglued.

Optically, they don't test particularly well on a defocused artificial star, or with a laser test (laser through an SCT that's known to have good optics, while the binos are placed, objectives first, in front of the scope. Two beams are then projected on the wall). However, in focus at 20x, they perform well enough in the real world. The edge correction is actually quite good, and the only effects I can see from the optical issues they have are on larger nighttime objects like Jupiter. Jupiter's disk appears flattened on one side, and a strong tinge of chromatic aberration (more than should be there) is visible. Venus is similar. Strangely enough, the moon looks nice, and the CA isn't too bad. Stars aren't extremely "tight", but they're pinpoint enough. During the day, they're just fine, though the binos produce images that are a bit less lively and "vivid" than the Nikon spotter- I suspect it's the coatings, as I noticed the same thing on the Konus spotters. But I'm being picky here- after alignment, they perform as well as could be expected for an inexpensive pair of giant binoculars. They'd be an amzing deal if only Konus used glue on the prisms that wasn't brittle. Though this might not be a problem with every pair. :)

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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 Post subject: Big Binos
PostPosted: Wed Sep 24, 2008 9:51 am 
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molecule
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Large aperture binoculars are a lot of fun.

I suggest checking out the Cygnus and Sagittarius starfields. They are jaw-dropping in the right binocular.

:)

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 Post subject:
PostPosted: Mon Sep 20, 2010 9:31 pm 
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molecule
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Nice binos Erik !!!! Gawd...I haven't been into this for about 5 years now...and the astro bug has bitten once again. I now have a pair of Celestron 15x80's on the way that were made in the 90's. Thanks for having me here on your forum...I'll be here and on CN to learn more again.

cheers bro. \:D/

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 Post subject:
PostPosted: Tue Sep 21, 2010 1:14 am 
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Hey Mark! Is that Mark as in Markus? Nice to see you, man! :cool:

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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PostPosted: Tue Sep 21, 2010 1:16 am 
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molecule
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yessir !!! `Tis me indeed. \:D/

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PostPosted: Tue Sep 21, 2010 1:18 am 
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Wow, it's been a long time! Welcome to the forum- hope to see you here often! :cool:

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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PostPosted: Tue Sep 21, 2010 1:19 am 
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molecule
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Thanks Erik !!! It`s been a while, thanks for the warm and friendly welcome !!!....I miss all you guys...ALL OF YOU are awesome and it`s great to learn from y?ll !!!

:razz:

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PostPosted: Tue Sep 21, 2010 6:01 am 
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Markus??? Fellow musician-man Mark...from up north, ya? Fantastic to hear from you, and welcome aboard! :cool:

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PostPosted: Tue Sep 21, 2010 6:05 am 
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You know, it's funny I should discover your posts at this moment, since "Chemistry" from Signals is playing in the background. :lol:

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“Life is like riding a bicycle. To keep your balance, you must keep moving.” ― Albert Einstein


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 Post subject: Re: Fun with big binos
PostPosted: Fri Nov 22, 2013 3:57 pm 
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molecule
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"Seems to me it's Chemistry" LOL!

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 Post subject: Re: Fun with big binos
PostPosted: Mon Nov 25, 2013 5:10 pm 
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I'll have to revisit that album. Haven't listened to Rush in a long time. :-/

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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