Since I was responding to patronizing and irrelevent items in the first place,
I may be expressing some shock, but it's just my tryiing to cope with your
understanding of depth of field and especially of metrology.
But to address your "issues":
You need to know your visual acuity,
Clearly it is well beyond that necessary to see 10-point font at 15 feet.
You still do not understand what this means to the test.
If this plays a part under the same outer conditions, so be it.
I am measuring the whole system, including my eye.
And....I know, from optics, that my pupil's effect at THIS test is mostly irrelevent.
I am talking about DOF effects and defocusing magnitudes well beyond the effect of the eye's pupil.
This is in the design of the test.
Like the eye doctor's.
and the corresponding effective resolution of the binocular
No: not if the effective resolution is beyond what's needed for 10-point font.
That is metrology: I set about neasure far PAST the effective resolution
if ANY of the tested binoculars. You are telling me I cannot be a dog-catcher
because I haven't considered mice.
This is by no means a 'maximum resolutuion test'. It is
a depth of field test with a specified error (cannot read 22-pt font).
Its standards are far beyond the "corresponding effective resolution"
of all the binoculars. I'm sorry if you do not grasp the meaning of this.
Let's look at some numbers:
----22-point font (that I print) is .250 inch. Illegibility happens at about .1 inch ambiguity gamma.
:: this is about 115 arc seconds.
----Excellent binoculars can do 4-8 arc seconds, including the eyes.
----Very bad ones, call it 25 arc seconds...worse than any I own.
----I know I can see 10-pt font on all units. Checking that is IN THE TEST. That is about 55 arc seconds.
If I can read 10-pt on all binocs, I can make out about 20 arc seconds.
If you cannot, no problem: just shift your fonts up to test.
(that, and get cheaper binoculars and a vacation: higher resolution is wasted)
The resolution of the binoculars is "controlled for" by the experiment.
The worst binoculars will lose 22-pt legibility the same way as the best binoculars.
It was fun calculating all that. My eyes are pretty good.
If your eyes are not so good, you focus at 22-pt for sharpest and go from there.
Your field depths will be different but if you do them all the same way they
are relevant to each other.
before you can start to interpret your DOF observations.
Once again, an optomterist does none of those things because the test
leaves them behind.
As do I.
By the same means.
I can resolve down past 10 point font. Always, in daylight.
Thus: Lower detail than that is obviously not relevant to losing 22-pt legibility.
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I can see the 'cloudynights' forum argues as much but they know far more,
about the systems and especially (!!) the metrology, real proof.
I might be in the wrong place.