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.
optical distance measurement
Started by ●September 26, 2022
Reply by ●September 27, 20222022-09-27
Reply by ●September 27, 20222022-09-27
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.
Reply by ●September 27, 20222022-09-27
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
Reply by ●September 27, 20222022-09-27
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
Reply by ●September 28, 20222022-09-28
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
Reply by ●September 28, 20222022-09-28
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
Reply by ●September 28, 20222022-09-28
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
Reply by ●September 30, 20222022-09-30
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