How does nonsense like this survive? (1 Viewer)

[Maljunulo]

From binocularsguides.com
“When you adjust the focus of porro prism binoculars you can do it just once and then look through the binoculars to view both distant and close objects. When you use roof prism binoculars you need to adjust the focus each time for different objects separately.”

From opticsmag.com
“Porro Prisms work by sending the light captured by your objective lens through a pair of prisms in a quick horizontal movement. The movement between prisms acts as an amplifier and inverter to send a magnified and orientation corrected image of your target through the ocular lenses.”

This for roof prisms.
“Their internal machinations are actually the most complex out of any other binocular style. And that’s because there’s no easy horizontal zig or zag. Remember, the movement of the light is what amplifies and inverts it as it reflects off the prisms. So, Roof prisms take advantage of intricate and convoluted machined paths that reflect the light from the objective to ocular lenses.”

Source: Roof Prism vs Porro Prism: In-Detail Comparison!
“One of the prisms works as an amplifier while the other acts as the inverter. The image that goes through the ocular lens is magnified and corrected, giving you the view you are after. It is easy to distinguish between Porro prism binoculars, and the others that you will come across as the placement of the glass blocks have a zigzag or offset shape.”

 

[quincy88]

From binocularsguides.com
“When you adjust the focus of porro prism binoculars you can do it just once and then look through the binoculars to view both distant and close objects.
When you use roof prism binoculars you need to adjust the focus each time for different objects separately.”

From opticsmag.com
“Porro Prisms work by sending the light captured by your objective lens through a pair of prisms in a quick horizontal movement. The movement between prisms acts as an amplifier and inverter to send a magnified and orientation corrected image of your target through the ocular lenses.”

This for roof prisms.
“Their internal machinations are actually the most complex out of any other binocular style. And that’s because there’s no easy horizontal zig or zag. Remember, the movement of the light is what amplifies and inverts it as it reflects off the prisms. So, Roof prisms take advantage of intricate and convoluted machined paths that reflect the light from the objective to ocular lenses.”

Source: Roof Prism vs Porro Prism: In-Detail Comparison!
“One of the prisms works as an amplifier while the other acts as the inverter. The image that goes through the ocular lens is magnified and corrected, giving you the view you are after. It is easy to distinguish between Porro prism binoculars, and the others that you will come across as the placement of the glass blocks have a zigzag or offset shape.”

Haha. That’s awesome. I really like the amplification and inversion talk. It sounds like the ravings of a lunatic.

 

[Maljunulo]

Multiple sources too.

I don’t know if they are all that ignorant, or if they all just copied the same drivel.

Why waste time learning, when you can copy someone else?

 

[wllmspd]

We’ve not even got onto the “magic” that coatings can do to things….

Peter

 

[Maljunulo]

We’ve not even got onto the “magic” that coatings can do to things….

Peter

I’ll let you do that one …… this was enough for me. I’m still shaking my head.

 

[tenex]

Wild guess re: quote #1: the only Porro bin they ever tried was a 7x with IF.

As to the others: such stupidity only has to happen once, after which it merely requires ignorant copying, today perhaps even by AI. Caveat lector.

 

[dries1]

Well they divested the thought without evaluation, and to top it off they integrated the wrong knowledge.

 

[Binastro]

Unfortunately, the internet generally is full of fake information from very ignorant people.

We are all ignorant to some extent and make mistakes.
I do, even with subjects I know well.

But the examples given above are just extreme examples of ignorance.

That is why it is better to go to peer reviewed books and papers.
But even here knowledge changes.

It was thought for ages that a full Moon is magnitude minus 12.7, but a fairly recent paper shows this is rarely true.
An average full Moon is minus magnitude 11.5.

This means the long regarded statement that the Sun is 450,000 times as bright as a full Moon is also wrong.
On average it is over one million times brighter.

Newspapers frequently get things ten times or one thousand times wrong, because the journalists rely on calculators.

Actually, Birdforum is usually very good on facts.

There is certainly a vast knowledge of birds.

As to binoculars, rubbish statements are soon challenged.

Most of the disputes are about personal preferences or minutae.

Anyway thanks for posting the crazy statements above.

Regards,
B.

 

[tenex]

But the examples given above are just extreme examples of ignorance.

Actually, what's most disturbing is that they're not complete rubbish; each has (or had) a kernel of truth that makes them sound somewhat plausible. Prisms do invert, the path through SP prisms is more convoluted, and so on. This means we're dealing not with simple ignorance, but actual inability to tell whether one has understood something before repeating it, which I find quite scary.

 

[Pinewood]

Hello,
@WJC
WJC taught me how to distinguish between facts and ridiculous advertising copy. Apparently, there is a lot more disinformation floating on the 'net, of which we must be aware.

Happy bird watching,
Arthur

 

[Foss]

It sounds like the ravings of a lunatic.

+ 1
And drivel written by halfwits for halfwits.

 

[Maljunulo]

I ran across another gem this morning.

From “How to use Binoculars” at enjoytheoutdoorlife.com
“A diopter is a magnifying tool that is often placed on the right barrel that helps you magnify your objects further. Our eyes may not have the same view and at times may need a little boost. This is where a diopter comes in to compensate for the poor view of one of the eyes.
The diopter has + and - signs on both ends where you can either increase or decrease the adjustments according to your needs. The diopter increases the magnifying power of the binoculars making it easy to spot objects easily. Only adjust the diopter if you are looking for tiny details in your object that the lenses alone cannot give you.”

 

[Mono]

From “How to use Binoculars” at enjoytheoutdoorlife.com

"Enjoy the Outdoor Life makes no representations, warranties, or assurances as to the accuracy, currency or completeness of the content contain on this website or any sites linked to or from this site."

 

[Maljunulo]

"Enjoy the Outdoor Life makes no representations, warranties, or assurances as to the accuracy, currency or completeness of the content contain on this website or any sites linked to or from this site."

It's a good thing.

I don't understand why this kind of idiocy isn't laughed off the internet. It is appalling that people actually get paid to write it.

 

[CharleyBird]

It just takes two words for warning bells to start:
Insta focus
Go focus
Self focus
Focus free
Auto focus
Quick focus

Not immediately obvious what is being touted.

 

[wllmspd]

I ran across another gem this morning.

From “How to use Binoculars” at enjoytheoutdoorlife.com
“A diopter is a magnifying tool that is often placed on the right barrel that helps you magnify your objects further. Our eyes may not have the same view and at times may need a little boost. This is where a diopter comes in to compensate for the poor view of one of the eyes.
The diopter has + and - signs on both ends where you can either increase or decrease the adjustments according to your needs. The diopter increases the magnifying power of the binoculars making it easy to spot objects easily. Only adjust the diopter if you are looking for tiny details in your object that the lenses alone cannot give you.”

Precious, why not add another diopter adjuster and go for zoom binoculars and all the amazing benefits that they provide… maybe upto >100x if you are really lucky!

Peter

 

[Mono]

All the above sites are affiliate link farms. Many retailers offer rewards if you send a customer their way. People will sign up to as many of these affiliate link schemes as they can then write glowing "reviews" of the products, nowadays using LLMs, including a "click here to buy link". To even cover your costs you need to have hundreds of such links.

 

[wllmspd]

Many sites also have names like “best xyx binoculars of 202x”, as if things change so rapidly you couldn’t possibly want last years models… sometimes it’s very hard to get google to dig through this sea of floating LLM flotsam.

Peter

 

[Binocollector]

It's a good thing.

I don't understand why this kind of idiocy isn't laughed off the internet. It is appalling that people actually get paid to write it.

I fear that with the rise of A. I. we will get tons more of this rubbish. Many of these "review sites" seem already mainly A. I. generated.

 

[Maljunulo]

Most sites I have read, which purport to list the “best” binoculars, list anything but.