Binocular Basics

How to Choose  What do the numbers mean? Coming soon...

Basic Operation  Basic operation of hand-holdable binoculars. Coming soon...

Mounting a Binocular on a Tripod  Kevin shows how to use an L adapter.

Oberwerk Mirror Mount

Why a Mirror Mount?  A short demonstration of the Oberwerk Mirror Mount.

Mirror Mount Setup, Front-Mount Binoculars  Setting up the Oberwerk Mirror Mount for a front-mount binocular.

Mirror Mount- Bottom-Mount Binoculars  Using the Oberwerk Mirror Mount with a bottom-mount binocular.

25/40x100mm Long-Range Observation Binocular

Oberwerk 25/40x100 Binocular Setup  Set up of the Oberwerk 25/40x100 binocular.

Oberwerk 25/40x100 Binocular Basics  Basic operation of the Oberwerk 25/40x100 binocular.

Oberwerk 7x50mm Finderscope  Oberwerk 7x50mm finderscope for the 25/40x100mm binocular.

Why so HEAVY???   We look at the components of the Oberwerk Long-Range Observation Binoculars in order to explain why these weigh much more than other 100mm binoculars.

BT-100-45 45-Degree 100mm Binocular Telescope

Oberwerk BT-100-45 Tripod/Fork Mount  Setting up the Oberwerk BT-100-45 tripod and fork mount.

Oberwerk BT-100-45 Setup  Setting up the Oberwerk BT-100-45 binocular.

Technical Support

Collimation- Introduction  Introduction to our series of videos about binocular alignment (collimation).

Myths of Conditional Alignment, Part 1  What is conditional alignment? What is true collimation? Why minor collimation adjustments do not cause conditional alignment.

Myths of Conditional Alignment, Part 2  How to insure that your binoculars are not conditionally aligned, but are perfectly aligned throughout the IPD range- no special equipment required. How to determine if a binocular needs repair before attempting collimation.

Common Alignment Errors  Detecting vertical error (step or dipvergence) and horizontal divergence/convergence. Rough measurement of error in arc minutes of degree (without instruments). Coming soon...

Collimating to Perfection  Achieving "perfect" collimation (in reality, the best average of the mechanical variances that conspire against perfection). Coming soon...

Collimation by Prism Tilt Set-Screws  How to align all Oberwerk binoculars, except for the 100mm Long-Range Observation binoculars and BT-Series. Coming soon...

Collimation by 3-Point Prism Shelf  How to align Oberwerk Long-Range and BT-Series binoculars. Coming soon...

Advanced- Collimation of the Individual Refractors on the BT Series  For perfectionist gearheads only- collimation of the individual refractors of Oberwerk Binocular Telescopes using the Cheshire eyepiece and laser collimator eyepiece. Coming soon...

Advanced- Repairing Misaligned Prisms  How to repair a binocular with alignment that changes with IPD setting and/or rotational errors (lean). Coming soon...

For Binocular Fanatics Only

Mounting the 150mm Fujinon   How to mount the 150mm Fujinon binocular to the Fujinon pedestal base. Don't be scared.

Fujinon 40x150 ED-SX   A quick look at the rare Fujinon 40x150 ED-SX, and the even rarer Miyauchi BR-141-90. Also the much more common Oberwerk BT-100-45 and BT-120-45.

Miyauchi BR-141   A quick look at the Miyauchi BR-141. Unfortunately, this is very likely the last BR-141 Miyauchi will ever produce.

Nikko/Kuhne 30/60x180mm   A look at the most unique privately-owned binocular in the world- the Nikko/Kuhne 30/60x180mm.

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