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Search: Posts Made By: typo
Forum: Binoculars Friday 21st September 2018, 07:44
Replies: 11
Views: 533
Posted By typo
Quincy, Welcome to the forum. Do you have an...

Quincy,

Welcome to the forum.

Do you have an idea what performance criteria and light levels these formulae might relate to?

You might want to check out the article Holger Merlitz wrote on...
Forum: Binoculars Thursday 13th September 2018, 14:54
Replies: 87
Views: 2,880
Posted By typo
I've not managed to find any studies directly...

I've not managed to find any studies directly comparing monocular with binocular acuities but, my experience at least, is the latter is usually a little better, so potential could exceed the Nyquist...
Forum: Binoculars Thursday 13th September 2018, 06:21
Replies: 87
Views: 2,880
Posted By typo
Binastro, Thank you alerting us to the work of...

Binastro,

Thank you alerting us to the work of Morris and Hamilton. Interesting stuff! It seem the visual criteria to enter the Navy air combat selection program was only 20/20 but the operational...
Forum: Zen Ray Tuesday 11th September 2018, 15:01
Replies: 9
Views: 441
Posted By typo
LTP, Thanks to reposting that link. I've used...

LTP,

Thanks to reposting that link. I've used that method a couple of times to check if a binocular was collimated or merely conditionally aligned. ;) It's rather similar to how I recall my father...
Forum: Binoculars Sunday 9th September 2018, 19:26
Replies: 87
Views: 2,880
Posted By typo
Unfortunately, the claims for Veronica Sieder's...

Unfortunately, the claims for Veronica Sieder's visual acuity I've found on line are far too vague to have any value. The details, such as the are, could be interpreted as anything between a very...
Forum: Binoculars Sunday 9th September 2018, 09:05
Replies: 71
Views: 3,156
Posted By typo
I've tried all those except the pre HD Ultravid...

I've tried all those except the pre HD Ultravid and the Dialyt, but generally not more than two at a time and over quite a long time period. Personally, I feel the EDG might head the list by a...
Forum: Zen Ray Saturday 8th September 2018, 06:50
Replies: 9
Views: 441
Posted By typo
Many thanks for the detailed explaination....

Many thanks for the detailed explaination. Disassembly sounds reasonably straight forward, but I've no immediate plans to give it a go. No doubt the skill is in reversing the process.;)

We have a TV...
Forum: Zen Ray Friday 7th September 2018, 21:12
Replies: 9
Views: 441
Posted By typo
That sounds very reassuring. I've never tried to...

That sounds very reassuring. I've never tried to take a roof apart, let alone attempted a repair. I'm rather fond of my ZR Prime, and it's nice to hear that there might be some hope of a rescue...
Forum: Zeiss Friday 7th September 2018, 12:02
Replies: 69
Views: 3,261
Posted By typo
Even within that program the experts disagreed....

Even within that program the experts disagreed. The argument is largely philosophical.

The electromagnetic spectum includes gamma rays, microwaves, and radio waves, but our planet happens to be...
Forum: Binoculars Thursday 6th September 2018, 05:46
Replies: 87
Views: 2,880
Posted By typo
Now you are talking psychology. Mind bending...

Now you are talking psychology. Mind bending stuff.:-O

As far as I am able to understand the literature, the brain plays a major role for all of us, constantly shifting the area of interest, and...
Forum: Binoculars Thursday 6th September 2018, 05:20
Replies: 87
Views: 2,880
Posted By typo
Exactly. The key point being, for some users that...

Exactly. The key point being, for some users that limit will be more than twice that of others. Some can readily spot the effective resolution differences between binoculars. Others clearly...
Forum: Binoculars Wednesday 5th September 2018, 14:27
Replies: 87
Views: 2,880
Posted By typo
Some have suggested the demands of the...

Some have suggested the demands of the traditional lifestyle might have made some evolutionary physiological differences, but so far I've found no evidence to support it. Unfortunately diseases such...
Forum: Binoculars Wednesday 5th September 2018, 14:18
Replies: 87
Views: 2,880
Posted By typo
Paddy, Clearly, effective resolution is not...

Paddy,

Clearly, effective resolution is not everyone's first priority. Colour, contrast, brightness (luminance) CA, aberration and ergonomics all need to be factored in. On the other hand, wouldn't...
Forum: Binoculars Wednesday 5th September 2018, 13:54
Replies: 87
Views: 2,880
Posted By typo
The anecdotal reports of the visual prowess of...

The anecdotal reports of the visual prowess of native Australians date back centuries, and through the last century some exceptional results have been recorded. In most cases where was little...
Forum: Binoculars Wednesday 5th September 2018, 06:51
Replies: 87
Views: 2,880
Posted By typo
I think i've been posting about stopped down...

I think i've been posting about stopped down testing for 6 or 7 years but it looks like it might be worth explaining things again.

Firstly some background. The pupil of the eye responds to light...
Forum: Binoculars Tuesday 4th September 2018, 20:12
Replies: 2
Views: 220
Posted By typo
I can't answer your questions as listed, but I'd...

I can't answer your questions as listed, but I'd rate the Minox BV II 8x25 as poor and the Nikon M7 8X30 as pretty good, or even excellent for the money, if you find one as good as the last sample I...
Forum: Others Tuesday 4th September 2018, 20:04
Replies: 6
Views: 444
Posted By typo
Nice write-up Chuck, but I'm afraid my take on...

Nice write-up Chuck, but I'm afraid my take on the EDIV is rather different.

I first saw a prototype of the EDIV about a year before it went on the market, and was far from complimentary at the...
Forum: Opticron Tuesday 4th September 2018, 17:25
Replies: 5
Views: 372
Posted By typo
Riccardo, You are quite right, I recall now they...

Riccardo,

You are quite right, I recall now they completely changed the optical design when they reduced the Natura with the Natura ED. I know I was expecting more from the 8x42 when I tried it, but...
Forum: Opticron Monday 3rd September 2018, 18:41
Replies: 5
Views: 372
Posted By typo
Riccardo, The Natura has the narrowest view, the...

Riccardo,

The Natura has the narrowest view, the Countryman fairly pronounced field curvature, but is the sharpest in my opinion, and the Imagic, a shallower field curvature and larger sweet spot....
Forum: Binoculars Monday 3rd September 2018, 18:02
Replies: 87
Views: 2,880
Posted By typo
A step at a time. Yes, if both optics have...

A step at a time.

Yes, if both optics have better effective resolution than you magnified acuity then the level of detail you see through both will be equally eyesight limited. I've worded that...
Forum: Binoculars Monday 3rd September 2018, 16:16
Replies: 87
Views: 2,880
Posted By typo
Bill we can agree on that at least. ;) That...

Bill we can agree on that at least. ;)

That diffraction limited binocular I referred to costs less than $200 in the US, but at that price I don't imagine the next sample would be as good. I was...
Forum: Binoculars Monday 3rd September 2018, 15:27
Replies: 87
Views: 2,880
Posted By typo
Tringa, This argument goes back to my the early...

Tringa,

This argument goes back to my the early days of the forum and beyond, and is one I'd hoped we'd put to bed many years ago.

If you follow the different threads you will be aware that the...
Forum: Binoculars Monday 3rd September 2018, 08:29
Replies: 87
Views: 2,880
Posted By typo
I discussed this subject in some detail with...

I discussed this subject in some detail with Milos a couple of years ago. He did argue that twilight performance was particularly important for their hunting and military customers. In fact they run...
Forum: Binoculars Monday 3rd September 2018, 07:20
Replies: 87
Views: 2,880
Posted By typo
Sorry, but you are mistaken. Some individuals...

Sorry, but you are mistaken. Some individuals definitely can, and do so easily hand held.

David
Forum: Binoculars Sunday 2nd September 2018, 22:26
Replies: 87
Views: 2,880
Posted By typo
Ron, If we assume an 80mm scope is optically...

Ron,

If we assume an 80mm scope is optically perfect and your eyesight is 20/10 then the maximum useful magnification is 41.4x, any more is redundant. If your eyesight is 20/20 you would need 82.8x...
Showing results 1 to 25 of 1000
 


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