Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 09-10-2011, 05:29   #76
Registered User
 
Knottysailorboy's Avatar

Join Date: Oct 2011
Posts: 56
Quote:
Originally Posted by Wotname

OK I am sure we are saying the same here, just in different ways .
My point is that almost all binoculars and not just some expensive ones have adjustment for near / far sightedness so that unless one needs spectacles for other reasons (eg astigmatism), then almost all can be used by spectacle wearers providing they are happy to remove their glasses each time they use the binoculars.

Therapy (and I) makes the point that the so called long eye relief models rarely seem to be "long enough". While I am sure some exist, the dozens of units I have tried, have never allowed a full field of view while wearing my glasses.

I would be interested to hear from anyone who has actually owned (or used) say a pair of 7 x 50's that give sufficient eye relief so one gets a full field of view when using them in conjunction with spectacles (or sunglasses).
What I said was there is, almost always, a difference with the focus distance for each eye for each individual. The adjustment you mentioned adjusts for this difference so that when you turn the center focus wheel the focus will be sharp for both eyes. Again, I ask that you Google "How to focus binoculars" for full instructions.
__________________

__________________
Knottysailorboy is offline   Reply With Quote
Old 09-10-2011, 09:21   #77
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: Time for New Binoculars - Any Recommendations ?

Quote:
Originally Posted by Wotname View Post
OK I am sure we are saying the same here, just in different ways ......
Quote:
Originally Posted by Knottysailorboy View Post
What I said was there is, almost always, a difference with the focus distance for each eye for each individual. The adjustment you mentioned adjusts for this difference so that when you turn the center focus wheel the focus will be sharp for both eyes.
Well, I was wrong, we are not saying the same thing after all.

While I agree with your assertion quoted above, I am adding that this is not the only function this adjustment is used for. I assert that in combination with the usual centre focus adjustment, the individual eye piece adjustment allows for correction of near or far sightedness of both eyes. Therefore I disagree that your post
Quote:
Originally Posted by Knottysailorboy View Post
Some of the more expensive ones have diopter adjustment on the eyepieces (+/- 3 diopters) so you can use them without glasses on, provided your eyes are not too bad.
as I believe it is factually incorrect. I assert that these features are found on almost very pair of binoculars, not just expensive ones. If you can explain where I am wrong, I will be happy to stand corrected. Please note the only reason to argue this point of difference is so others can be fully informed as to the facts of binoculars rather than just opinions (mine or yours).

Quote:
Originally Posted by Knottysailorboy View Post
Again, I ask that you Google "How to focus binoculars" for full instructions.
I understand that you are wanting to be helpful especially as you have no way of knowing of my experience so this is a good a time as any to say that I have some background in using a variety of optics. Ex professional photographer (Canon, Nikon, Lecia optics), ex bench rest marksman and hunter (Leupold optics), and an amateur user (and owner) of Nikon, Bushnell, Tasco, Zeiss and several "no brand" binoculars so I am confident I can correctly focus my optics. However I am not an optic designer so I realize I still have much to learn and if you can enlighten me, so much the better.
__________________

__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 09-10-2011, 11:44   #78
Registered User
 
Knottysailorboy's Avatar

Join Date: Oct 2011
Posts: 56
How can it correct for both eyes if it is only on the right eye piece? It is to correct for the difference in your eyes. Only the center focus wheel focuses both sides simultaneously.
__________________
Knottysailorboy is offline   Reply With Quote
Old 09-10-2011, 15:26   #79
Senior Cruiser
 
Therapy's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: W Florida
Boat: The Jon boat still, plus a 2007 SeaCat.
Posts: 6,894
Images: 4
Re: Time for New Binoculars - Any Recommendations ?

Quote:
Originally Posted by Wotname View Post
I would be interested to hear from anyone who has actually owned (or used) say a pair of 7 x 50's that give sufficient eye relief so one gets a full field of view when using them in conjunction with spectacles (or sunglasses).
ME TOO!
__________________
Who knows what is next.
Therapy is offline   Reply With Quote
Old 09-10-2011, 15:35   #80
Senior Cruiser
 
Therapy's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: W Florida
Boat: The Jon boat still, plus a 2007 SeaCat.
Posts: 6,894
Images: 4
Re: Time for New Binoculars - Any Recommendations ?

Quote:
Originally Posted by Knottysailorboy View Post
How can it correct for both eyes if it is only on the right eye piece? It is to correct for the difference in your eyes. Only the center focus wheel focuses both sides simultaneously.

Because you focus one eye with the main focus wheel first. That takes care of that eye.

Then you use the eyepiece focus to bring the other eye into focus. That takes care of that eye.

Now both eyes see a focused image.

Now you look at the markings on the eyepiece and remember it so when you pick up another (properly loaned of course ) you just set the adjustable eyepiece to your needed + or - setting and you are good to go.

PS. None of this focusing discussion has anything to do with how much of the field one can see while wearing a pair of glasses. I know how to focus them with or without my glasses. I want to see the whole image. Know of anybody that has one?
__________________
Who knows what is next.
Therapy is offline   Reply With Quote
Old 09-10-2011, 17:41   #81
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: Time for New Binoculars - Any Recommendations ?

Quote:
Originally Posted by Knottysailorboy View Post
How can it correct for both eyes if it is only on the right eye piece? It is to correct for the difference in your eyes. Only the center focus wheel focuses both sides simultaneously.
Quote:
Originally Posted by Therapy View Post
Because you focus one eye with the main focus wheel first. That takes care of that eye.

Then you use the eyepiece focus to bring the other eye into focus. That takes care of that eye.

Now both eyes see a focused image..............
While Therapy has explained how it corrects for both eyes, I feel that it is important in this instance to expand this by adding a "proof".

Take a single pair of binoculars and two people with a known difference in eyesight (say one nearsighted and the other either normal or farsighted). Using only the side that does not have an adjustable eyepiece, have one person focus on a nearby object (about 50 yards or so) using the centre focusing wheel. Then have the other person focus on the same object. If the second person has to move the centre focus wheel, then it proves that the centre focus wheel has corrected for the differences between eyes of each person (one side only of course), QED

Now the other side can be adjusted just by using the adjustable eyepiece in the normal manner.
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 09-10-2011, 18:54   #82
Registered User

Join Date: Jul 2008
Location: San Diego
Boat: Fairweather Mariner/Westsail 39
Posts: 57
Re: Time for New Binoculars - Any Recommendations ?

I have had a pair of the Fujinon Polaris with the compass now for more than 30 years, tens of thousands of sea miles, and they still function perfectly, are amazingly bright, and sharp as a tack. Impressed with the quality I also sprang for a pair of the stabilized 14x Fuji's a few years ago. I found them to be awesome as well until at just past a year old they received a modest (and I do mean modest - as in within normal careful use) bump whereupon the internal stabilizing mechanism broke. I should also say that these are obviously delicate equipment, I kept them in the padded box unless needed for a specific purpose, and treated them with the same care I give to the expensive Canon stabilized lenses on my digital SLR, all of which have been used far more without any damage. As it turns out, the US repair facility is not far from my house, so I hand delivered them and ( as they were just out of warranty) paid for the repair. The next trip out they broke again, with not even a bump to attribute cause this time. Fujinon did not respond to repeated attempts at contact and I finally gave up in disgust. I now have a really nice yellow waterproof case to put something in if need arises as the stabalized binoculars have been consigned to the trash can where they belonged.

As a professional mariner, I can highly recommend stabilized binoculars for any use up to and including looking at the moon in your back yard.
__________________
squarerigger is offline   Reply With Quote
Old 10-10-2011, 02:15   #83
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: Time for New Binoculars - Any Recommendations ?

Quote:
Originally Posted by squarerigger View Post
I have had a pair of the Fujinon Polaris with the compass now for more than 30 years, tens of thousands of sea miles, and they still function perfectly, are amazingly bright, and sharp as a tack. Impressed with the quality I also sprang for a pair of the stabilized 14x Fuji's a few years ago. I found them to be awesome as well until at just past a year old they received a modest (and I do mean modest - as in within normal careful use) bump whereupon the internal stabilizing mechanism broke. I should also say that these are obviously delicate equipment, I kept them in the padded box unless needed for a specific purpose, and treated them with the same care I give to the expensive Canon stabilized lenses on my digital SLR, all of which have been used far more without any damage. As it turns out, the US repair facility is not far from my house, so I hand delivered them and ( as they were just out of warranty) paid for the repair. The next trip out they broke again, with not even a bump to attribute cause this time. Fujinon did not respond to repeated attempts at contact and I finally gave up in disgust. I now have a really nice yellow waterproof case to put something in if need arises as the stabalized binoculars have been consigned to the trash can where they belonged.

As a professional mariner, I can highly recommend stabilized binoculars for any use up to and including looking at the moon in your back yard.
Very interesting. This is the first negative report I have heard about the Fujinon stabilized units. Some of the local airborne SAR guys used to have Canon stabilized units but found the stabilization mechanisms broke regularly and they switched to Fujinon where they had a better success rate. Perhaps they also learnt to be more careful!
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 10-10-2011, 02:44   #84
Registered User
 
LakeSuperior's Avatar

Join Date: Jan 2008
Boat: Teak Yawl, 37'
Posts: 1,581
Images: 7
Re: Time for New Binoculars - Any Recommendations ?

Quote:
Originally Posted by Wotname View Post
I would be interested to hear from anyone who has actually owned (or used) say a pair of 7 x 50's that give sufficient eye relief so one gets a full field of view when using them in conjunction with spectacles (or sunglasses).
I am currently using my Fujinon 7x50 FMTRC-SX glasses almost every day for the last six months with prescription Ray-Ban Aviator glasses...how's that!! On the overnight passages I use them without the sun glasses.

Because of the large exit aperture you absolutely get the full field of view with the glasses. They are designed to work with glasses as well as without. They are a beautiful handful of precision optics.
__________________
LakeSuperior is offline   Reply With Quote
Old 10-10-2011, 03:19   #85
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,331
Re: Time for New Binoculars - Any Recommendations ?

Quote:
Originally Posted by LakeSuperior View Post
I am currently using my Fujinon 7x50 FMTRC-SX glasses almost every day for the last six months with prescription Ray-Ban Aviator glasses...how's that!! On the overnight passages I use them without the sun glasses.

Because of the large exit aperture you absolutely get the full field of view with the glasses. They are designed to work with glasses as well as without. They are a beautiful handful of precision optics.
Excellent, thanks for posting. Looking at the specs I see the eye relief is an impressive 23 mm and I have just found this interesting link (even if a little old) reviewing this unit's older cousin FMT-SX. IMO, it makes good reading.
Review: 7x50 Miyauchi Binon vs. Fujinon FMT-SX vs. Tasco No. 124
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 10-10-2011, 03:23   #86
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Living on dirt waiting for our new yacht to be built.
Boat: Half built Bestevaer.
Posts: 10,619
Re: Time for New Binoculars - Any Recommendations ?

Look for binoculars with long eye relief if you want to use them with glasses. The eye relief (in mm) should be listed in the specs.
Some binoculars have a way to adjust the eye relief. Usually by simply adjusting the eyepiece.
Both center focus binoculars and individual focusing binoculars can be adjusted for differences between the eyes, or for moderate degrees of long or short slightness. They cannot be adjusted to correct for astigmatism (many people that are short or longsighted also have some astigmatism).
__________________
noelex 77 is offline   Reply With Quote
Old 10-10-2011, 05:35   #87
Registered User
 
Knottysailorboy's Avatar

Join Date: Oct 2011
Posts: 56
Quote:
Originally Posted by Wotname
Very interesting. This is the first negative report I have heard about the Fujinon stabilized units. Some of the local airborne SAR guys used to have Canon stabilized units but found the stabilization mechanisms broke regularly and they switched to Fujinon where they had a better success rate. Perhaps they also learnt to be more careful!
I have never had any reason to use image stabilized binoculars, because all of mine are 8x or less magnification with large objective lenses, so I can't comment on the ruggedness of their systems. I do have a camera (Olympus) with stabilization built-in the camera body (not the lenses) and it seems fairly rugged. Stabilization is only really necessary at higher magnifications (more than 8x), I think. I have used unstabilized zoom binoculars that went up to 15x and they were difficult to hold steady at high magnification. Combine that with the pitching motion of a boat and it is easy to see how stabilization would be beneficial.
__________________
Knottysailorboy is offline   Reply With Quote
Old 10-10-2011, 12:51   #88
Senior Cruiser
 
Therapy's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: W Florida
Boat: The Jon boat still, plus a 2007 SeaCat.
Posts: 6,894
Images: 4
Re: Time for New Binoculars - Any Recommendations ?

Quote:
Originally Posted by LakeSuperior View Post
I am currently using my Fujinon 7x50 FMTRC-SX glasses almost every day for the last six months with prescription Ray-Ban Aviator glasses...how's that!! On the overnight passages I use them without the sun glasses.

Because of the large exit aperture you absolutely get the full field of view with the glasses. They are designed to work with glasses as well as without. They are a beautiful handful of precision optics.

That is what I need to know.

Thanks for the info.

Will look into them.
__________________
Who knows what is next.
Therapy is offline   Reply With Quote
Old 10-10-2011, 12:52   #89
Senior Cruiser
 
Therapy's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: W Florida
Boat: The Jon boat still, plus a 2007 SeaCat.
Posts: 6,894
Images: 4
Re: Time for New Binoculars - Any Recommendations ?

Quote:
Originally Posted by noelex 77 View Post
Look for binoculars with long eye relief if you want to use them with glasses. The eye relief (in mm) should be listed in the specs.

They cannot be adjusted to correct for astigmatism (many people that are short or longsighted also have some astigmatism).
Uhhuh.

And that is why we need the ones that will work with glasses.
__________________

__________________
Who knows what is next.
Therapy is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Buy Owners Time Devilsrule2004 Atlantic & the Caribbean 5 04-02-2012 14:01
Documenting Sea Service Time Mariners Commercial Posts 1 03-10-2011 09:50
Stories Lost in Time . . . Randyonr3 Off Topic Forum 13 31-07-2011 13:22



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 11:12.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.