That is the question?
Which is better, more magnification or less on a 70 mm bino?
🤔🤔🤔
On Monday, July 31, 2023 at 1:24:42 PM UTC-4, StarDust wrote:
That is the question?If other specs stay the same, then the 25x bino will have a smaller field, likely fewer than three degrees.
Which is better, more magnification or less on a 70 mm bino?
🤔🤔🤔
A small telescope of that aperture is a better choice, for several reasons. It can have 10x, 15x, 20x etc magnifications. It can use filters. It will have better ergonomics. It can be cheaper. It doesn't even have to be just 70mm either.
That is the question?
Which is better, more magnification or less on a 70 mm bino?
🤔🤔🤔
On 31/07/2023 18:24, StarDust wrote:
That is the question?How old are your eyes? How dark are you skies?
Which is better, more magnification or less on a 70 mm bino?
🤔🤔🤔
Do you use them for other things in daylight like birding?
The exit pupils of either should be OK for astro being 4.6mm and 2.8mm respectively. You only really need to worry about exit pupils of 5mm and larger where older eyes won't get the benefit of the full aperture.
For my money 25x is too much to hand hold so you would need a tripod or
gyro stabiliser with them as well. 15x is just about hand holdable especially if you can rest them on something.
Increased magnification makes the sky proportionately darker but also
gives a smaller field of view. Which is best for you depends a bit on
how good you are at pointing them where you intend to view.
12x70 might be more easily hand holdable if your eyes are young enough.
--
Martin Brown
On Tuesday, August 1, 2023 at 12:43:40 AM UTC-7, Martin Brown wrote:
On 31/07/2023 18:24, StarDust wrote:
That is the question?How old are your eyes? How dark are you skies?
Which is better, more magnification or less on a 70 mm bino? 🤔🤔🤔
Do you use them for other things in daylight like birding?
The exit pupils of either should be OK for astro being 4.6mm and 2.8mm respectively. You only really need to worry about exit pupils of 5mm and larger where older eyes won't get the benefit of the full aperture.
For my money 25x is too much to hand hold so you would need a tripod or gyro stabiliser with them as well. 15x is just about hand holdable especially if you can rest them on something.
Increased magnification makes the sky proportionately darker but also gives a smaller field of view. Which is best for you depends a bit on
how good you are at pointing them where you intend to view.
12x70 might be more easily hand holdable if your eyes are young enough.
--I've never seen 12x70 bino!
Martin Brown
😱
On Tuesday, August 1, 2023 at 11:23:48 AM UTC-7, W wrote:
On Tuesday, August 1, 2023 at 1:23:27 PM UTC-4, StarDust wrote:
On Tuesday, August 1, 2023 at 12:43:40 AM UTC-7, Martin Brown wrote:
On 31/07/2023 18:24, StarDust wrote:
That is the question?How old are your eyes? How dark are you skies?
Which is better, more magnification or less on a 70 mm bino? 🤔🤔🤔
Do you use them for other things in daylight like birding?
The exit pupils of either should be OK for astro being 4.6mm and 2.8mm respectively. You only really need to worry about exit pupils of 5mm and
larger where older eyes won't get the benefit of the full aperture.
For my money 25x is too much to hand hold so you would need a tripod or
gyro stabiliser with them as well. 15x is just about hand holdable especially if you can rest them on something.
Increased magnification makes the sky proportionately darker but also gives a smaller field of view. Which is best for you depends a bit on how good you are at pointing them where you intend to view.
12x70 might be more easily hand holdable if your eyes are young enough.
Just Google "12x70 binocular" and you will see some advertised as 12x70.--I've never seen 12x70 bino!
Martin Brown
😱
You will have to weigh the pros and cons. If you want something more powerful than your 10x50, maybe an RFT refractor will be better.I all ready have a 80 mm APO f/6.3 refractor. https://www.astronomy.com/observing/celestron-onyx-80edf-telescope/
On Tuesday, August 1, 2023 at 1:23:27 PM UTC-4, StarDust wrote:
On Tuesday, August 1, 2023 at 12:43:40 AM UTC-7, Martin Brown wrote:
On 31/07/2023 18:24, StarDust wrote:
That is the question?How old are your eyes? How dark are you skies?
Which is better, more magnification or less on a 70 mm bino? 🤔🤔🤔
Do you use them for other things in daylight like birding?
The exit pupils of either should be OK for astro being 4.6mm and 2.8mm respectively. You only really need to worry about exit pupils of 5mm and larger where older eyes won't get the benefit of the full aperture.
For my money 25x is too much to hand hold so you would need a tripod or gyro stabiliser with them as well. 15x is just about hand holdable especially if you can rest them on something.
Increased magnification makes the sky proportionately darker but also gives a smaller field of view. Which is best for you depends a bit on how good you are at pointing them where you intend to view.
12x70 might be more easily hand holdable if your eyes are young enough.
Just Google "12x70 binocular" and you will see some advertised as 12x70.--I've never seen 12x70 bino!
Martin Brown
😱
You will have to weigh the pros and cons. If you want something more powerful than your 10x50, maybe an RFT refractor will be better.
On Tuesday, August 1, 2023 at 1:23:27 PM UTC-4, StarDust wrote:
On Tuesday, August 1, 2023 at 12:43:40 AM UTC-7, Martin Brown wrote:
On 31/07/2023 18:24, StarDust wrote:
That is the question?How old are your eyes? How dark are you skies?
Which is better, more magnification or less on a 70 mm bino? 🤔🤔🤔
Do you use them for other things in daylight like birding?
The exit pupils of either should be OK for astro being 4.6mm and 2.8mm respectively. You only really need to worry about exit pupils of 5mm and larger where older eyes won't get the benefit of the full aperture.
For my money 25x is too much to hand hold so you would need a tripod or gyro stabiliser with them as well. 15x is just about hand holdable especially if you can rest them on something.
Increased magnification makes the sky proportionately darker but also gives a smaller field of view. Which is best for you depends a bit on how good you are at pointing them where you intend to view.
12x70 might be more easily hand holdable if your eyes are young enough.
Just Google "12x70 binocular" and you will see some advertised as 12x70.--I've never seen 12x70 bino!
Martin Brown
😱
You will have to weigh the pros and cons. If you want something more powerful than your 10x50, maybe an RFT refractor will be better.
On Tuesday, August 1, 2023 at 11:23:48?AM UTC-7, W wrote:
On Tuesday, August 1, 2023 at 1:23:27?PM UTC-4, StarDust wrote:
On Tuesday, August 1, 2023 at 12:43:40?AM UTC-7, Martin Brown wrote:Just Google "12x70 binocular" and you will see some advertised as 12x70.
On 31/07/2023 18:24, StarDust wrote:I've never seen 12x70 bino!
That is the question?How old are your eyes? How dark are you skies?
Which is better, more magnification or less on a 70 mm bino?
???
Do you use them for other things in daylight like birding?
The exit pupils of either should be OK for astro being 4.6mm and 2.8mm >> > > respectively. You only really need to worry about exit pupils of 5mm and >> > > larger where older eyes won't get the benefit of the full aperture.
For my money 25x is too much to hand hold so you would need a tripod or >> > > gyro stabiliser with them as well. 15x is just about hand holdable
especially if you can rest them on something.
Increased magnification makes the sky proportionately darker but also
gives a smaller field of view. Which is best for you depends a bit on
how good you are at pointing them where you intend to view.
12x70 might be more easily hand holdable if your eyes are young enough. >> > >
--
Martin Brown
?
You will have to weigh the pros and cons. If you want something more powerful than your 10x50, maybe an RFT refractor will be better.
Zhumell has 12x70 bino for $100 on Amazon.
Mostly good reviews.
Use to own a 70 mm bino 20 years ago, forgot the brand, maybe Orion?, they're nice, can be hand held for a short time comfortably.
I was at a Star party 20 years ago in LA, Al Nagler , the old guy was there, trying to show Venus in his 85 refractor, but couldn't find it.
He said, it probably already below the horizon.
My 70 bino was hanging in my neck, so I peacked around and founded.
Told Al there it is and he asked for my bino to look.
He was happy he founded too.
Than he looked it my bino, asked what kind is it?
Told him the brand, he took another look, and complimented, this is very nice binocular and gave it to me back.
I was kind of happy, Mr. Al Nagler, Telvue president praised my bino. >?????????
On Tue, 1 Aug 2023 15:12:32 -0700 (PDT),
wrote:
On Tuesday, August 1, 2023 at 11:23:48?AM UTC-7, W wrote:
On Tuesday, August 1, 2023 at 1:23:27?PM UTC-4, StarDust wrote:
On Tuesday, August 1, 2023 at 12:43:40?AM UTC-7, Martin Brown wrote:Just Google "12x70 binocular" and you will see some advertised as 12x70. >>
On 31/07/2023 18:24, StarDust wrote:I've never seen 12x70 bino!
That is the question?How old are your eyes? How dark are you skies?
Which is better, more magnification or less on a 70 mm bino?
???
Do you use them for other things in daylight like birding?
The exit pupils of either should be OK for astro being 4.6mm and 2.8mm
respectively. You only really need to worry about exit pupils of 5mm and
larger where older eyes won't get the benefit of the full aperture. >> > >
For my money 25x is too much to hand hold so you would need a tripod or
gyro stabiliser with them as well. 15x is just about hand holdable
especially if you can rest them on something.
Increased magnification makes the sky proportionately darker but also >> > > gives a smaller field of view. Which is best for you depends a bit on >> > > how good you are at pointing them where you intend to view.
12x70 might be more easily hand holdable if your eyes are young enough.
--
Martin Brown
?
You will have to weigh the pros and cons. If you want something more powerful than your 10x50, maybe an RFT refractor will be better.
Zhumell has 12x70 bino for $100 on Amazon.
Mostly good reviews.
Use to own a 70 mm bino 20 years ago, forgot the brand, maybe Orion?, they're nice, can be hand held for a short time comfortably.
I was at a Star party 20 years ago in LA, Al Nagler , the old guy was there, trying to show Venus in his 85 refractor, but couldn't find it.
He said, it probably already below the horizon.
My 70 bino was hanging in my neck, so I peacked around and founded.
Told Al there it is and he asked for my bino to look.
He was happy he founded too.
Than he looked it my bino, asked what kind is it?
Told him the brand, he took another look, and complimented, this is very nice binocular and gave it to me back.
I was kind of happy, Mr. Al Nagler, Telvue president praised my bino. >?????????
Reputation of Al Nagler aside, a guy who can't find Venus when it's
above the horizon... maybe not somebody whose praise should be taken
too seriously!
On Tuesday, August 1, 2023 at 4:02:26?PM UTC-7, Chris L Peterson wrote:
On Tue, 1 Aug 2023 15:12:32 -0700 (PDT),
wrote:
On Tuesday, August 1, 2023 at 11:23:48?AM UTC-7, W wrote:Reputation of Al Nagler aside, a guy who can't find Venus when it's
On Tuesday, August 1, 2023 at 1:23:27?PM UTC-4, StarDust wrote:
On Tuesday, August 1, 2023 at 12:43:40?AM UTC-7, Martin Brown wrote:Just Google "12x70 binocular" and you will see some advertised as 12x70. >> >>
On 31/07/2023 18:24, StarDust wrote:I've never seen 12x70 bino!
That is the question?How old are your eyes? How dark are you skies?
Which is better, more magnification or less on a 70 mm bino?
???
Do you use them for other things in daylight like birding?
The exit pupils of either should be OK for astro being 4.6mm and 2.8mm
respectively. You only really need to worry about exit pupils of 5mm and
larger where older eyes won't get the benefit of the full aperture. >> >> > >
For my money 25x is too much to hand hold so you would need a tripod or
gyro stabiliser with them as well. 15x is just about hand holdable
especially if you can rest them on something.
Increased magnification makes the sky proportionately darker but also >> >> > > gives a smaller field of view. Which is best for you depends a bit on >> >> > > how good you are at pointing them where you intend to view.
12x70 might be more easily hand holdable if your eyes are young enough.
--
Martin Brown
?
You will have to weigh the pros and cons. If you want something more powerful than your 10x50, maybe an RFT refractor will be better.
Zhumell has 12x70 bino for $100 on Amazon.
Mostly good reviews.
Use to own a 70 mm bino 20 years ago, forgot the brand, maybe Orion?, they're nice, can be hand held for a short time comfortably.
I was at a Star party 20 years ago in LA, Al Nagler , the old guy was there, trying to show Venus in his 85 refractor, but couldn't find it.
He said, it probably already below the horizon.
My 70 bino was hanging in my neck, so I peacked around and founded.
Told Al there it is and he asked for my bino to look.
He was happy he founded too.
Than he looked it my bino, asked what kind is it?
Told him the brand, he took another look, and complimented, this is very nice binocular and gave it to me back.
I was kind of happy, Mr. Al Nagler, Telvue president praised my bino.
?????????
above the horizon... maybe not somebody whose praise should be taken
too seriously!
Well, he didn't try it hard for sure, he's been showing other objects to the crowed too.
Venus was kind of hanging over the tree line, anyway, if I remember correctly! >So, he skipped over it!
I'm sure he is a super HQ astronomer and instrument builder, like you Chris! >Al use to work for NASA, he designed the optics for a simulator for the Apollo program, when the astronauts look out through the window,
they see space, proper stars and planets orientation, far as I know.
Back then was no computer simulation, like now days, they used optics and projections!
I think, his son runs the company now!
One time he came to Livermore, CA to a large telescope stores, showing his new eyepieces, a huge Nagler, it was called the Holy buzuka? buy users or something!
Before he was living, he made a short speech to a small crowed, when finished asked anyone for questions?
Someone asked what's for the near future for the company, about new eyepieces, telescope etc....?
He kind of wandered off, thinking, pausing, then I jumped in with my big mouth, asking - How about a Dobsonian, Al?
He took a dirty look it me and said -
Over my dead body!!!!!
Hehehe!
???
https://www.televue.com/images/TV3_Images/Images_in_articles/AlNaglerAnEye2TheStars.jpg
https://i.ytimg.com/vi/Act0omPVOSs/maxresdefault.jpg
On 7/31/23 1:24 PM, StarDust wrote:
That is the question?Depends on your purpose. For me, I could probably go either way, but
Which is better, more magnification or less on a 70 mm bino?
🤔🤔🤔
then again I have the necessary support network that would almost
certainly be needed for the 25x version. By support, I mean tripods, ballheads, etc.
During my youth, I used a pair of Japanese made Focal 20x60's for years
on a simple photo tripod to divulge many a backyard DSO! Although I
could hand hold them, the tripod was essential to steady the view for
any more serious observing I did.
I was basically gifted a pair of Celestron 20x80's a few years back.
They saw little use, but anytime they were used, it was with a robust
photo tripod with heavy duty ballhead. I never did try to hand hold them.
Before the 20x80's, I had purchased a pair of Japanese made Celestron 11x80's second hand. Although I hand held those every so often, I still preferred their usage with the tripod.
Good luck with your choice!
On Tue, 1 Aug 2023 21:02:05 -0700 (PDT), StarDust <cso...@gmail.com>
wrote:
On Tuesday, August 1, 2023 at 4:02:26?PM UTC-7, Chris L Peterson wrote:
On Tue, 1 Aug 2023 15:12:32 -0700 (PDT),
wrote:
On Tuesday, August 1, 2023 at 11:23:48?AM UTC-7, W wrote:Reputation of Al Nagler aside, a guy who can't find Venus when it's
On Tuesday, August 1, 2023 at 1:23:27?PM UTC-4, StarDust wrote:
On Tuesday, August 1, 2023 at 12:43:40?AM UTC-7, Martin Brown wrote: >> >> > > On 31/07/2023 18:24, StarDust wrote:Just Google "12x70 binocular" and you will see some advertised as 12x70.
I've never seen 12x70 bino!That is the question?How old are your eyes? How dark are you skies?
Which is better, more magnification or less on a 70 mm bino?
???
Do you use them for other things in daylight like birding?
The exit pupils of either should be OK for astro being 4.6mm and 2.8mm
respectively. You only really need to worry about exit pupils of 5mm and
larger where older eyes won't get the benefit of the full aperture.
For my money 25x is too much to hand hold so you would need a tripod or
gyro stabiliser with them as well. 15x is just about hand holdable >> >> > > especially if you can rest them on something.
Increased magnification makes the sky proportionately darker but also
gives a smaller field of view. Which is best for you depends a bit on
how good you are at pointing them where you intend to view.
12x70 might be more easily hand holdable if your eyes are young enough.
--
Martin Brown
?
You will have to weigh the pros and cons. If you want something more powerful than your 10x50, maybe an RFT refractor will be better.
Zhumell has 12x70 bino for $100 on Amazon.
Mostly good reviews.
Use to own a 70 mm bino 20 years ago, forgot the brand, maybe Orion?, they're nice, can be hand held for a short time comfortably.
I was at a Star party 20 years ago in LA, Al Nagler , the old guy was there, trying to show Venus in his 85 refractor, but couldn't find it.
He said, it probably already below the horizon.
My 70 bino was hanging in my neck, so I peacked around and founded.
Told Al there it is and he asked for my bino to look.
He was happy he founded too.
Than he looked it my bino, asked what kind is it?
Told him the brand, he took another look, and complimented, this is very nice binocular and gave it to me back.
I was kind of happy, Mr. Al Nagler, Telvue president praised my bino.
?????????
above the horizon... maybe not somebody whose praise should be taken
too seriously!
Well, he didn't try it hard for sure, he's been showing other objects to the crowed too.
Venus was kind of hanging over the tree line, anyway, if I remember correctly!
So, he skipped over it!
I'm sure he is a super HQ astronomer and instrument builder, like you Chris!
Al use to work for NASA, he designed the optics for a simulator for the Apollo program, when the astronauts look out through the window,
they see space, proper stars and planets orientation, far as I know.
Back then was no computer simulation, like now days, they used optics and projections!
I think, his son runs the company now!
One time he came to Livermore, CA to a large telescope stores, showing his new eyepieces, a huge Nagler, it was called the Holy buzuka? buy users or something!
Before he was living, he made a short speech to a small crowed, when finished asked anyone for questions?
Someone asked what's for the near future for the company, about new eyepieces, telescope etc....?
He kind of wandered off, thinking, pausing, then I jumped in with my big mouth, asking - How about a Dobsonian, Al?
He took a dirty look it me and said -
Over my dead body!!!!!
Hehehe!
???
https://www.televue.com/images/TV3_Images/Images_in_articles/AlNaglerAnEye2TheStars.jpg
https://i.ytimg.com/vi/Act0omPVOSs/maxresdefault.jpg
Yeah, I've met him a few times over the years. A good optical designer (although I've never felt the need to purchase any of his products,
which IMO do not provide good enough value to justify the price). In
any case, the comment was largely tongue-in-cheek. It's pretty funny
to imagine somebody peering into a scope desperately trying to find
Venus while the entire crowd around him can't miss it with their eyes
alone!
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