40420 - Binoculars LEICA - Free user manual and instructions

Product Type	Binoculars
Brand	Leica
Model	40420
Magnification	8x
Objective Lens Diameter	20 mm
Field of View at 1000 m	119 m
Focusing	Central, knurled wheel
Prism Type	Roof (Schmidt-Pechan)
Lens Coating	Multi-coated, anti-reflective
Minimum Focus Distance	2.5 m
Diopter Adjustment	Right eyepiece, -4 to +4 D
Exit Pupil	2.5 mm
Eye Relief	15 mm
Waterproof	Yes, waterproof to 5 m
Nitrogen Filling	Yes, fog-proof
Housing Material	Robust aluminum
Rubber Coating	Non-slip rubber armor
Weight	260 g
Dimensions (L x W x H)	110 x 65 x 38 mm
Supplied Accessories	Case, strap, cleaning cloth, lens caps
Warranty	10 years (conformity)

Frequently Asked Questions - 40420 LEICA

How to adjust focus on the Leica 40420 binoculars?

Turn the central focusing wheel until you get a sharp image. To compensate for vision differences between your eyes, use the diopter adjustment on the right eyepiece: close your right eye, focus on an object with the central wheel, then open your right eye and close your left, adjust the diopter ring until sharp.

How to clean the lenses of the binoculars?

Use the supplied microfiber cloth. First blow off dust with a blower bulb, then gently wipe in circular motions from the center outward. Never use solvents or chemicals. For stubborn dirt, lightly moisten the cloth with distilled water.

Are the binoculars waterproof and shock-resistant?

Yes, the Leica 40420 binoculars are waterproof to 5 meters depth and nitrogen-filled to prevent fogging between lenses. The aluminum housing with rubber armor offers good resistance to light shocks. Avoid violent drops.

How to store the binoculars when not in use?

Place the lens and eyepiece caps, store the binoculars in the supplied case in a dry place at room temperature. Avoid prolonged exposure to sunlight or extreme temperatures. Remove batteries if a light is integrated (not applicable here).

What to do if the image is blurry or double?

First check the diopter adjustment. If the problem persists, clean the lenses. If the image remains blurry, there may be an internal misalignment; contact Leica customer service. Do not attempt to disassemble the binoculars yourself.

Can I use the binoculars with prescription glasses?

Yes, the eyepieces have fold-down eyecups. If you wear glasses, fold down the eyecups to bring your eyes closer to the eyepieces and benefit from the 15 mm eye relief. This allows you to see the entire field of view.

What is the warranty for the Leica 40420 binoculars?

Leica offers a 10-year warranty on manufacturing and material defects. You must keep the purchase receipt. For any repairs, contact an authorized Leica center. Accidental damage is not covered.

How to adjust the interpupillary distance?

Fold the binoculars at the central hinge to adjust the distance between the eyepieces to your pupillary distance (IPD). Turn gently until you get a single circular field without dark areas. The typical range is 56 to 72 mm.

What is the field of view of these binoculars?

The field of view is 119 meters at 1000 meters, or an apparent angle of 6.8°. This corresponds to a wide field suitable for birdwatching, landscapes, or shows. The 8x magnification offers a good compromise between stability and field.

Can I use a tripod with these binoculars?

The Leica 40420 binoculars do not have a built-in tripod adapter. You can use a universal adapter (sold separately) that attaches to the central hinge. This allows stable observation during long sessions.

USER MANUAL 40420 LEICA

Foreword

Leica Customer Service 11

Warning notice

Tripod adapter

Caution:

Caution:

Leica Customer Service

Worldwide, the name Leica stands for superb optical quality, close-tolerance precision engineering, absolute reliability, and long product life.

We wish you a great deal of enjoyment and success with your new Leica Duovid. The outstanding optical properties and the variable magnification allow you to adjust these handy binoculars to various viewing situations.

So that you can use them properly, we recommend that you first of all read these instructions.

Nomenclature

1. Eyepiece cups

Position a: unscrewed for viewing without glasses

Position b: screwed in for viewing with glasses

1. Adjustable rings for selecting the magnification with indexed markings
2. Fixed rings with markings for the two magnifications
3. Lockable diopter adjustment ring
4. Eyelets for carrying strap
5. Central focusing ring
6. Hinged joint for adjusting the eyebase

Table of Contents

Foreword 12

Nomenclature 12

Possible applications 14

Attaching the carrying strap 14

Attaching the protective eyepiece cover ..... 14

Care and maintenance 15

Tripod Adapter 15

Carrying case 15

Adjusting the eyecups 16

Adjusting the eyebase 17

Setting the magnification 17

Focusing/Diopter adjustment ..... 18

Technical Data 21

Leica Academy 22

Leica in the Internet 22

Leica Information Service 22

Leica Customer Service 22

Warning notice

As with all binoculars, avoid looking directly at sources of bright light with your Leica Duovid as this could cause eye damage.

Possible applications

The Leica Duovid is a high-performance set of binoculars with two magnifications that can be selected as required. The lower magnification provides a bright, stable image with a large field of view and a large depth of field. The higher magnification offers outstanding recognition of details of distant objects and in conditions of poor light. The balanced weight distribution and the perfect ergonomics combine to give an extraordinarily stable image despite the high magnification.

The Leica Duovid has a hermetically sealed, nitrogen-filled, and die-cast aluminum housing. It is therefore suited for rough outdoor use. There is no need to be concerned with moisture as it is 100% waterproof to a depth of 5 m and the internal optical system is not subject to fogging.

Attaching the carrying strap

Attaching the protective eyepiece cover

The eyepiece cover is placed over the eyepiece cups. It is fixed using the carrying strap.

Care and maintenance

Your Leica binoculars need no special maintenance. Use a soft lens brush or a blower to remove large particles of dirt, sand, etc. To remove fingerprints etc., first wipe the eyepiece and lens with a damp cloth, then dry them with a piece of clean, soft chamois leather or lint-free cloth. If the binoculars, particularly the telescopic eyepiece tubes, are very dirty, rinse them in a basin of water rather than under a running faucet.

Always rinse off salt water.

Moisture inside the central focusing unit (visible through the scale window) will dry quickest when the diopter adjustment ring (4) is pulled up, i.e. unlocked.

Tripod Adapter

This practical tripod adapter is equipped with a 1/4" thread for all Duovid models and allows long-term shake-free viewing. In the case of the Leica Duovid 10+15x50 it is included in the scope of delivery.

Carrying case

The soft leather carrying case supplied with your Leica binoculars protects them from dirt. A flap with snap fasteners is provided at the top of the case, through which the carrying case strap can be fed.

Adjusting the eyecups

The eyepiece cups (1) can be easily adjusted by turning them and they lock securely into the selected positions. They can also be completely removed for thorough cleaning.

For viewing with eyeglasses (Figure A) they remain in the fully screwed-in position. For viewing without eyeglasses, they are unscrewed

by turning them anticlockwise. Two positions are available for optimum adjustment (Figure B, C). If the eyepieces are very dirty, it is recommended to remove the cups for cleaning (Figure D). To do this, they are turned slightly back clockwise and gently pulled while in the fully unscrewed position.

Adjusting the eyebase

To set the eyebase, adjust the binoculars at the hinged joint. The left and right fields of view must merge and produce a single circular image.

Setting the magnification

The Leica Duovid offers the user a choice of two magnifications. The magnification is adjusted using the adjustable rings (2) below the two eyepiece cups. Both rings must always be completely moved into the appropriate end position.

Notes:

Intermediate settings are possible, although identical magnification in both optical systems cannot be guaranteed in this case. Furthermore, the automatic diopter setting (ADC™ – Automatic Diopter Compensation, see also the next section “Focusing/Diopter compensation”) only applies in the two end positions. Incorrect settings can therefore quickly lead to a strain on the eyes and to fatigue.

As the left ring is linked to the automatic diopter setting, its movement is slightly stiffer than that of the right ring.

Focusing/Diopter adjustment

With the Leica Duovid the central focusing ring (6) is used to set the focus for variously distant objects.

Note:

The focusing of the Leica Duovid is retained after the magnification is changed. However, a slight adjustment can be required in practice. This is especially true when changing to a higher magnification after having focused with a lower magnification. The reasons for this are the larger depth of field at lower magnification, which often leads to slightly less precise focusing, and the eyes' accommodation capacity.

Compensation for individual defective vision for viewing without eyeglasses is made using the diopter ring (4), which is normally locked. (Figure A). First of all, the central focusing ring is used to focus the right barrel on an object. The diopter ring is then released by pulling it up. (Figure B).

Attention:

If the left magnification adjustment ring is not in an end position, i.e. at 8x or 12x/10x or 15x, the diopter ring is locked and cannot be released.

The diopter ring is then twisted to set the optimum focusing for the left barrel. Pressing the diopter ring back down locks the set value. Defective vision differences of up to ±3 diopters can be compensated in this way.

Attention:

Do not adjust the magnification with the diopter ring released. The left ring for adjusting the magnification is locked when the diopter ring is released.

For viewing on just the left or the right side, the other eye should be kept closed or the appropriate half of the binoculars simply covered at the front on the lens.

The set value can be conveniently read from the accurate scale on the diopter ring.

Technical Data

	LEICA DUOVID 8+12x 42 LEICA DUOVID	10+15x50
Magnification: 8-/12x 10-/15x
Lens diameter: 42mm 50mm
Exit pupil: for 8x magnification: 5.25mm, for 10x magnification: 5.00mm, for 12x magnification: 3.5mm for 15x magnification: 3.3 mm
Twilight factor: for 8x magnification: 18.33, for 10x magnification: 22.36, for 12x magnification: 22.45 for 15x magnification: 27.39,
Geometric light value:	for 8x magnification: 27.56, for 12x magnification: 12.25 for 15x magnification: 11.1,	for 10x magnification: 25.00,
Field of view:	for 8x magnification: 118 m at 1.000m distance, in degrees 6.7°, for 12x magnification: 90m at 1.000m distance, in degrees: 5.1°	for 10x magnification: 92 m at 1.000m distance, in degrees 5.3°, for 15x magnification: 70 m at 1.000m distance, in degrees: 4.0°
Close focusing limit:	3.50m, -4,5dptr. focussing above infinity	3.80m, -4,5dptr. focussing above infinity
Adjusting magnification:	single eyepiece setting
Diopter compensation:	±3 dptr., -4.5 diopters focusing above infinity, setting is retained when magnification is changed (ADC TM – Automatic Diopter Compensation)
Eyebase:	adjustable between 56–74mm
Type of prism:	roof
Phase correction coating on prisms:	yes, P40
Operating temperature:	-25°C to 55°C
Storage temperature:	-40°C to 85°C
Waterproofing:	waterproof up to 0.5 bar = 5 m water depth, nitrogen-filled to avoid fogging in any situation
Housing material:	die-cast aluminum, completely rubber-armored and ergonomically shaped for secure grip
Dimensions (W 1 x H 2 x D 1 ):	120 x 157 x 67mm	126 x 195 x 67mm
Weight:	1.045g	1.250g

¹ With eyebase set to 65mm

² With eyecups screwed in

Leica Academy

Our seminars offer participants practical information on the Leica world of values and the fascination of skilled use of Leica products. Course programs are application-oriented and informative. They offer a wealth of practical suggestions, help, and advice.

Leica Camera AG

Leica Akademie

Oskar-Barnack-Str. 11/D 35606 Solms

Tel: [phone]

Fax: [phone]

e-mail: [e-mail]

Leica in the Internet

You can find up to date information about products, novelties, special events, and the Leica company on our home page in the internet:

http://www.leica-camera.com

Leica Information Service

Should you have any technical questions regarding the use of Leica products, the Leica

information service will be happy to answer in writing or by phone, fax, or e-mail:

Leica Camera AG

Leica Customer Service

For service of your Leica equipment and in case of necessary repairs please contact the customer services of Leica Camera AG or of any national Leica agency (see warranty card for address list). Ask your authorized dealer and Leica specialist for advice.

Leica Camera AG

Repair Service

Oskar-Barnack-Str. 11/D 35606 Solms

Tel: [phone]

Fax: [phone]

e-mail: [e-mail]

Foreword

Dear customer,

Attention:

Attention:

Leica Customer Service

Tripod adapter

Note:

Note:

Leica Customer Service

Attention:

Attention:

Leica Customer Service

Leica & Minox Department

I-20090 Opera-Zerbo (Milano)

Tel: +39 - 02 53 0021

Fax: +39 - 02 5760 9141

e-mail: [e-mail]

Foreword

Dear customer,

Tripod adapter

Attention:

Attention:

Customer Service Leica