NEW Terra ED 32mm Under Armour Edition Binocular (1 Viewer)

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Holger Merlitz

Well-known member

• Jan 22, 2015

• #41

Alexis Powell said:

Ha! You're preaching to the choir. HOWEVER, I don't see how coming from a world that mostly uses the metric system is any excuse for not being able to handle the elementary math involved in doing the conversion properly. Heck, these days you can just type it into the Google search window, don't even have to do the math. How those presumably educated Germans at Leica can engineer the bins but can't handle simple maths is hard to fathom

--AP

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Perhaps it is so because the marketing guys are writing the ads, not the engineers

Holger

 

PeterPS

Well-Known Member

• Jan 22, 2015

• #42

It's not only about ISU

A little bit of math is needed too. They have the FoV as x[m]/1000m. What they often do is this: they correctly convert x[m] in y[ft], BUT forget to convert 1000m in yds, and calculate the ratio properly. So they wrongly state the FoV as y[ft]/1000yds. It's amazing how often this err is made. I have tried to convince people at Leupold that the FoV of the Mojave was wrongly calculated, as above, but failed to make them understand.

Peter.

 

Last edited: Jan 22, 2015

PeterPS

Well-Known Member

• Jan 22, 2015

• #43

In a nutshell: they often correctly convert the numerator of the ratio, but not its denominator.

 

Troubador

Moderator

Staff member

Supporter

• Jan 22, 2015

• #44

pesto said:

In a nutshell: they often correctly convert the numerator of the ratio, but not its denominator.

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Are we allowed to use language like this on the Forum? :-O

Lee

 

PeterPS

Well-Known Member

• Jan 22, 2015

• #45

"Mathematics is the language in which God has written the universe."[Galileo Galilei]
So that was God's jargon, not mine.....God spoke to me again, in simpler terms this time: divide the ft in ft/1000yd by 3 to get the FoV in m/1000m, or vice-versa.

Peter.

 

NDhunter

Experienced observer

• Jan 23, 2015

• #46

pesto said:

"Mathematics is the language in which God has written the universe."[Galileo Galilei]
So that was God's jargon, not mine.....God spoke to me again, in simpler terms this time: divide the ft in ft/1000yd by 3 to get the FoV in m/1000m, or vice-versa.

Peter.

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Peter:

Good one, we have the right way to measure in US feet and inches, the metric equivalents, and
now we have common core, not sure what they will offer up there, as 2+2 does not equal 4 !
I used to be on the local school board, this is being discussed today.

It seems the binocular specs. advertised are more often wrong than right.

I would be interested in what Galileo would think today.

Jerry

 

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justabirdwatcher

Well-known member

• Jan 23, 2015

• #47

It will be interesting to see how well those 8x32's stack up against my Sightron Blue Sky's

 

james holdsworth

Consulting Biologist

• Jan 23, 2015

• #48

justabirdwatcher said:

It will be interesting to see how well those 8x32's stack up against my Sightron Blue Sky's

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There we go, off topic again.....

 

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peatmoss

Well-known member

• Jan 23, 2015

• #49

Not to muddy the waters all over again, but they list the eyepiece at 60* ("subjective field of view"), which, at 8x, implies a 7.5* actual field, or about 393 ft.

 

PeterPS

Well-Known Member

• Jan 23, 2015

• #50

Magnification times FoV is only an (over)approximation of the AFoV, which I believe explains the discrepancy.///Peter

 

PeterPS

Well-Known Member

• Jan 23, 2015

• #51

Just as an example, the AFoV (calculated using the current ISO standard) of a 8x set with FoV=8.8* (such as the EII 8x30) is 63.2* (not 70.4*)///Peter

 

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Holger Merlitz

Well-known member

• Jan 23, 2015

• #52

pesto said:

Just as an example, the AFoV (calculated using the current ISO standard) of a 8x set with FoV=8.8* (such as the EII 8x30) is 63.2* (not 70.4*)///Peter

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Right, and the measured AFOV of the 8x30 EII is 67.6*, because it is neither free of distortion (which would correspond to the ISO-standard), nor corrected according to the angle condition, but with a moderate pincushion distortion in between those two.

Cheers,
Holger

 

NDhunter

Experienced observer

• Feb 19, 2015

• #53

It seems time to put this one to the top. Has anyone tried the new Terra 8x32?

The FOV thing has occupied much of the energy, and so just looking for user opinions.

The specs find these nice and light and fit in the compact range.

Jerry

 

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ceasar

Well-known member

• Feb 19, 2015

• #54

Jerry,

Camera Land had the 32mm Terra EDs listed last week so I called about them. They called me back and said they wouldn't be available until April. They have now changed their website to reflect this but they are taking orders for them.

Bob

PS: I did not order one. I can wait. And their specs for the 8x32 show that same erroneous FOV of 442'@1000yards.

http://www.cameralandny.com/optics/zeiss.pl?page=zeiss_523205

 

Last edited: Feb 19, 2015

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SEOW

Well-known member

• Mar 3, 2015

• #55

Now listed as "In Stock" at Eagle Optics:

http://www.eagleoptics.com/binoculars/zeiss/zeiss-terra-ed-8x32-binocular

 

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ceasar

Well-known member

• Mar 3, 2015

• #56

SEOW said:

Now listed as "In Stock" at Eagle Optics:

http://www.eagleoptics.com/binoculars/zeiss/zeiss-terra-ed-8x32-binocular

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They still give the wrong FOV.

Bob

 

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John Dracon

John Dracon

• Mar 4, 2015

• #57

Eagle Optics has the Terra 8x32 in stock, and I ordered one today. Should receive it in several days, and I'll tell the Forum what I think of it. This Under Armor harness thing seems overkill for such a petite binocular.

John

 

Troubador

Moderator

Staff member

Supporter

• Mar 4, 2015

• #58

John Dracon said:

Eagle Optics has the Terra 8x32 in stock, and I ordered one today. Should receive it in several days, and I'll tell the Forum what I think of it. This Under Armor harness thing seems overkill for such a petite binocular.

John

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Look forward to hearing all about it John :t:

Lee

 

FrankD

Well-known member

• Mar 4, 2015

• #59

Thank you John. I look forward to reading your review. The 32 mm Terra is certainly one that caught my eye. I enjoyed the optics of the 42 mm model but wasn't too fond of the fact focus. Would you be kind enough to comment on it when you do your review?

Thank you.

 

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John Dracon

John Dracon

• Mar 10, 2015

• #60

The Terra ED 8x32 arrived this early afternoon and I spent until dark putting it through the paces comparing it to other similar binoculars . My report will come tomorrow.
John