Binoculars Gallery

Binoculars are a bit more involved than telescopes and a lot more can go wrong with them. Here are some examples of work that has been done to the ones that come in for repair, servicing and restoration.


Binoculars need to be collimated correctly.  A collimator is shown with a pair of Nikon 10X50's on the mount having the collimation adjusted. This method is known as "tail of arc" which is the only method to ensure that the hinge and both sides are all parallel and that the binocular can be used at all pupillary distances. The pupillary distance scale appears on the centre hinge closest to the eyepiece and is marked off in millimetres.  The scale usually has a range of between 58mm and 74mm.  Everyone has a different pupillary distance and if the hinge and sides are not parallel then only at one pupillary distance will there be a single image, at all other settings there will be two.

12X50 Zeiss which has been serviced and ready to go back to the owner.

A dismantled antique binocular prior to being cleaned and reassembled.

My own Goerz Trieder 9X20 Binoculars

A 20X80 metal body of which the right hand barrel has been cleaned. The left one is covered with hand and machine oil and 40 years of dust.

Turning up a new ebonite eyecup on the lathe.

A prism with mould before cleaning.

The same prism after the mould has been removed and the prism cleaned.

My own Goerz Fago 3 1/3 X 15 binoculars.

Tapping a new thread for the broken stud on a Steiner binocular.

A Japanese WWII battleship binocular which had come in to have the prisms cleaned and a collimation done.

Prism cluster from the Japanese WWII binocular.

An opera glass from 1876 which was brought in with the barrels broken into many pieces. The parts were reassembled over a fibreglass substrate.

A Bausch & Lomb binocular which has been "painted".  This shows one side done before they were cleaned and then the binocular serviced and collimated.

A Zeiss stereo or ranging telescope used in WWI. The owner had tried to clean them quite vigourously with a steel brush. The paintwork had to be redone and the brasswork cleaned up as well as a collimation.

My own Goertz Unipoint Opera Glasses before I started work on them. The leatherette glue has let go and all the optics are milky and dusty.

The front objectives of the Goertz Unipoint opera glasses.

The aluminium oxide on the body under the leatherette.

The back of the leatherette with the aluminium oxide sticking to it. This was carefully brushed and scraped off.

All the parts immediately after disassembly and prior to cleaning.

All parts now cleaned and ready to be reassembled.

Finally reassembled. The leatherette was readhered with shellac, which is how it was done originally.

A Leitz (now Leica) prism cluster from a 10x42 Trinovid. Badly mould infested.

The same prism from the Leitz 10x42 Trinovid after cleaning.

A Leitz 10x42 Trinovid disassembled for cleaning.

I had a German WW2 Marine Flak binocular come in for restoration.  The condition was far from optimal!  The paint was flaking off and parts were missing or not working.  A few pictures here show the original condition and the final condition before they were returned to the owners.