optical distance measurement...

[Hul Tytus]

Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

Hul

 

[Martin Brown]

On 26/09/2022 17:07, Hul Tytus wrote:

Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

They are a bit out of fashion these days. Try Surplus Shack or similar.
Keyword you want are optical range finder.

https://en.wikipedia.org/wiki/Coincidence_rangefinder

Once popular with photographers, golfers and the military.

--
Regards,
Martin Brown

 

[a a]

On Monday, 26 September 2022 at 18:07:28 UTC+2, Hul Tytus wrote:

Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

Hul

get Kinect camera for Xbox 360
connet to PC, laptop to learn how 3D optical multi-point distance measurement works

Point cloud is projected and camera is moving or object is moving and closer and further object move at the same angular speed but closer objects move faster in linear speed, futher objects move slower
and easy algorithm calculates distance of every point in projected point cloud array
to build 3D image on-the-fly

 

[Phil Hobbs]

Hul Tytus wrote:

Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

Hul



\"Rangefinder\".

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[Hul Tytus]

Thanks Martin - I\'ll give Surplus Shack a look and try again with Google
and Yahoo.

Hul

Martin Brown <\'\'\'newspam\'\'\'@nonad.co.uk> wrote:

On 26/09/2022 17:07, Hul Tytus wrote:
Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

They are a bit out of fashion these days. Try Surplus Shack or similar.
Keyword you want are optical range finder.

https://en.wikipedia.org/wiki/Coincidence_rangefinder

Once popular with photographers, golfers and the military.

--
Regards,
Martin Brown

 

[Hul Tytus]

Thanks Phil, I\'ll see how that works.

Hul

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

Hul Tytus wrote:
Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

Hul



\"Rangefinder\".

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[Clifford Heath]

On 27/9/22 02:07, Hul Tytus wrote:

Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

I used to have a 1950\'s Leica with the \"split image rangefinder\".
I think that\'s the search term you need to use.

Clifford Heath.

 

[a a]

On Tuesday, 27 September 2022 at 00:31:40 UTC+2, Clifford Heath wrote:

On 27/9/22 02:07, Hul Tytus wrote:
Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly..
Any ideas on where such devices might be sold or what a
suitable search term would be.
I used to have a 1950\'s Leica with the \"split image rangefinder\".
I think that\'s the search term you need to use.

Clifford Heath.

A split-image spot, sometimes called a split image rangefinder or split-prism, is an optical focusing aid sometimes incorporated into a reflex camera\'s ground glass screen. When the image is out of focus, the two halves of the image appear \"split\" with an offset between them. When in focus, the halves line up to form a single image.
Split prism - Camera-wiki.org - The free camera encyclopedia
camera-wiki.org/wiki/Split_prism
camera-wiki.org/wiki/Split_prism

===But he is looking for

Coincidence rangefinder - Wikipedia
https://en.wikipedia.org/wiki/Coincidence_rangefinder

OverviewDesignApplicationsUsageCoincidence vs stereoscopic rangefindersSee alsoExternal links

A coincidence rangefinder or coincidence telemeter is a type of rangefinder that uses mechanical and optical principles to allow an operator to determine the distance to a visible object. There are subtypes split-image telemeter, inverted image, or double-image telemeter with different principles how two images in a single ocular are compared. Coincidence rangefinders were

 

[Jasen Betts]

On 2022-09-26, Hul Tytus <ht@panix.com> wrote:

Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

Hul

coincidence rangefinder, I\'ve never seen one that small.




--
Jasen.

 

[Martin Brown]

On 26/09/2022 21:50, Hul Tytus wrote:

Thanks Martin - I\'ll give Surplus Shack a look and try again with Google
and Yahoo.

Hul

There is the odd ex WWII one that comes up on eBay from time to time.
I have no idea if they are in good working condition but some look
plausible (if a little overpriced for what they are). eg.

https://www.ebay.co.uk/itm/125518890546

Photographers ones are smaller, less accurate and cheaper Kodak eg

https://www.ebay.co.uk/itm/295231781933

There is a Yashica one on the same page that looks quite nice.

Laser rangefinders are all the rage now.

Martin Brown <\'\'\'newspam\'\'\'@nonad.co.uk> wrote:
On 26/09/2022 17:07, Hul Tytus wrote:
Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

They are a bit out of fashion these days. Try Surplus Shack or similar.
Keyword you want are optical range finder.

https://en.wikipedia.org/wiki/Coincidence_rangefinder

Once popular with photographers, golfers and the military.

--
Regards,
Martin Brown

--
Regards,
Martin Brown

 

[Hul Tytus]

Clifford - I\'ll that term a try. Do you rember if that Leica displayed
the range found or just used it for it\'s own purposes?

Hul

Clifford Heath <no_spam@please.net> wrote:

On 27/9/22 02:07, Hul Tytus wrote:
Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

I used to have a 1950\'s Leica with the \"split image rangefinder\".
I think that\'s the search term you need to use.

Clifford Heath.

 

[Hul Tytus]

The one I saw was inexpensive, ie nothing fancy, for the consumer market.
The larger ones were possibly aimed at specific markets, military, survey etc.

Hul

Jasen Betts <usenet@revmaps.no-ip.org> wrote:

On 2022-09-26, Hul Tytus <ht@panix.com> wrote:
Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

Hul

coincidence rangefinder, I\'ve never seen one that small.

--
Jasen.

 

[Hul Tytus]

There was one on ebay/usa but the atendant verbiage implied nonworking. I\'ll
give the ones you mentioned a look. Who knows, shipping may be possible.

Hul

Martin Brown <\'\'\'newspam\'\'\'@nonad.co.uk> wrote:

On 26/09/2022 21:50, Hul Tytus wrote:
Thanks Martin - I\'ll give Surplus Shack a look and try again with Google
and Yahoo.

Hul

There is the odd ex WWII one that comes up on eBay from time to time.
I have no idea if they are in good working condition but some look
plausible (if a little overpriced for what they are). eg.

https://www.ebay.co.uk/itm/125518890546

Photographers ones are smaller, less accurate and cheaper Kodak eg

https://www.ebay.co.uk/itm/295231781933

There is a Yashica one on the same page that looks quite nice.

Laser rangefinders are all the rage now.

Martin Brown <\'\'\'newspam\'\'\'@nonad.co.uk> wrote:
On 26/09/2022 17:07, Hul Tytus wrote:
Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

They are a bit out of fashion these days. Try Surplus Shack or similar.
Keyword you want are optical range finder.

https://en.wikipedia.org/wiki/Coincidence_rangefinder

Once popular with photographers, golfers and the military.

--
Regards,
Martin Brown

--
Regards,
Martin Brown

 

[Clifford Heath]

On 28/9/22 07:12, Hul Tytus wrote:

Clifford - I\'ll that term a try. Do you rember if that Leica displayed
the range found or just used it for it\'s own purposes?

There were two little lenses about 5cm apart, and a viewfinder that
combined the two images, presumably with a half-silvered mirror. One of
the view lenses was visible through a mirror steered by a mechanical
linkage to the focus lever. The linkage had the correct geometry to
track the focal distance.

Clifford Heath

 

[Hul Tytus]

Clifford - was the focus lever marked with the focal distance?

Hul

Clifford Heath <no_spam@please.net> wrote:

On 28/9/22 07:12, Hul Tytus wrote:
Clifford - I\'ll that term a try. Do you rember if that Leica displayed
the range found or just used it for it\'s own purposes?

There were two little lenses about 5cm apart, and a viewfinder that
combined the two images, presumably with a half-silvered mirror. One of
the view lenses was visible through a mirror steered by a mechanical
linkage to the focus lever. The linkage had the correct geometry to
track the focal distance.

Clifford Heath

 

[Hul Tytus]

Martin - I took a look at the ebay pages. There was a
\"Watameter shoe mount rangefinder\" that I bought. A bit of a gamble
but that\'s part of ebay. I do appreciate your suggestions for
these were the first found on the internet.

Hul

Martin Brown <\'\'\'newspam\'\'\'@nonad.co.uk> wrote:

On 26/09/2022 21:50, Hul Tytus wrote:
Thanks Martin - I\'ll give Surplus Shack a look and try again with Google
and Yahoo.

Hul

There is the odd ex WWII one that comes up on eBay from time to time.
I have no idea if they are in good working condition but some look
plausible (if a little overpriced for what they are). eg.

https://www.ebay.co.uk/itm/125518890546

Photographers ones are smaller, less accurate and cheaper Kodak eg

https://www.ebay.co.uk/itm/295231781933

There is a Yashica one on the same page that looks quite nice.

Laser rangefinders are all the rage now.

Martin Brown <\'\'\'newspam\'\'\'@nonad.co.uk> wrote:
On 26/09/2022 17:07, Hul Tytus wrote:
Anyone familiar with the optical device for measuring distance that
is similar to a dual telescope. You look at an object and adjust the
device to bring the 2 images together. The distance to the object is
then indicarted. Some may just indicate the angle. The one\'s I\'ve seen
were about 12 inches wide and 1 or 2 deep.
Google only showed laser this & laser that; advertizers only apparantly.
Any ideas on where such devices might be sold or what a
suitable search term would be.

They are a bit out of fashion these days. Try Surplus Shack or similar.
Keyword you want are optical range finder.

https://en.wikipedia.org/wiki/Coincidence_rangefinder

Once popular with photographers, golfers and the military.

--
Regards,
Martin Brown

--
Regards,
Martin Brown

 

[Clifford Heath]

On 29/9/22 01:15, Hul Tytus wrote:
> Clifford - was the focus lever marked with the focal distance?

The focal distance was on the base of the lens tube, the way it usually
is on manual-focus lenses. The lever was a knob on the side of that,
adjacent the body.

Clifford Heath

Clifford Heath <no_spam@please.net> wrote:
On 28/9/22 07:12, Hul Tytus wrote:
Clifford - I\'ll that term a try. Do you rember if that Leica displayed
the range found or just used it for it\'s own purposes?

There were two little lenses about 5cm apart, and a viewfinder that
combined the two images, presumably with a half-silvered mirror. One of
the view lenses was visible through a mirror steered by a mechanical
linkage to the focus lever. The linkage had the correct geometry to
track the focal distance.

Clifford Heath

 

[Hul Tytus]

Thanks, that clarifies the nature of the device.

Hul

Clifford Heath <no_spam@please.net> wrote:

On 29/9/22 01:15, Hul Tytus wrote:
Clifford - was the focus lever marked with the focal distance?

The focal distance was on the base of the lens tube, the way it usually
is on manual-focus lenses. The lever was a knob on the side of that,
adjacent the body.

Clifford Heath

Clifford Heath <no_spam@please.net> wrote:
On 28/9/22 07:12, Hul Tytus wrote:
Clifford - I\'ll that term a try. Do you rember if that Leica displayed
the range found or just used it for it\'s own purposes?

There were two little lenses about 5cm apart, and a viewfinder that
combined the two images, presumably with a half-silvered mirror. One of
the view lenses was visible through a mirror steered by a mechanical
linkage to the focus lever. The linkage had the correct geometry to
track the focal distance.

Clifford Heath