Modern Classic SLR Series :
Canon EOS-1N Series AF SLR camera
Viewfinder and various other Issues that relate

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Settler, Western Wall, Jerusalem by Daman Lynch
Credit: Image courtesy of , Mr. Daman Lynch® from Aotearora New Zealand. You can access his impressive Portfolio at Pbase or his personal site. Image copyright © 2006. All rights reserved. Please respect the visual property of the contributing photographer.

<<--- Settler, Western Wall, Jerusalem. " ... I'm guessing this man is a settler. Although I didn't have the chance to confirm that he was by asking him, his powerful weapon provides a significant clue.
Daman Lynch

(4) Dioptric Adjustment Mechanism and Adjustment Lenses

The dioptric adjustment knob is accessible after the eyecup is removed. Turning the knob can correct the diopter from -3 to +1 diopter The dioptre can be immediately corrected to suit your fluctuating vision and help provide a clear image in the viewfinder at all times. if the camera's dioptric adjustment range is too narrow, separately sold dioptric adjustment lenses can be fitted on Rubber Frame Ec, which is then attached to the eyepiece. The lenses can expand the diopter correction range to -6 to +5 diopters.

Rear Section Eyepiece feature EOS-1N
The built-in dioptric adjustment mechanism varies the diopter in a range of -1 ± 2 dpt (-3 dpt - +1 dpt) by moving the convex eyepiece lens backward and forward (movement amount: 3.5 mm). Due to the addition of the built-in eyepiece shutter in the EOS-1N, there is less space available for moving the adjustment lens than in the EOS-1 (lens movement amount: 5 mm). However, by increasing the power of the EOS-1N's eyepiece lens, the same adjustment range as the EOS-1 was achieved despite the smaller movement range.

The viewfinder magnifications at the various adjustment positions are shown in the Table below. If the user requires greater compensation than is provided by the built-in dioptric adjustment function, the Dioptric Adjustment Lenses E can be used. The adjustment range possible when combined with these lenses is -5.6 dpt - +5.4 dpt.

Built-in Dioptric Adjustment Position & Finder Magnification
Dioptric adjustment position - 3.0 - 2.0 - 1.0 0 + 1
Viewfinder magnification 0.726 0.727 0.726 0.725 0.721

Joyeous Weep Miss Malaysia, by Philp Chong, Malaysia

<<--- Joyous weep, Miss Malaysia Final. The winning beauty eventually also won the world's Miss Chinese Pageant contest that year.

Credit: Image courtesy of another good friend, Mr. Philip Chong®Ex-Photo Editor of Advance Images Magazine. This image was also being used as entry photo for his Portfolio. Image copyright © 1996-2005. All rights reserved. Please respect the visual property of the contributing photographer.

(5) Interchangeable Focusing Screens

As part of a professional SLR system, and also due to the fact Canon has decided omitting the interchangeable prism feature in the EOS-1 series, there are eight (8) interchangeable focusing screens (including the standard Ec-Cll screen) are available to suit various picture-taking requirements. The standard focusing screen provided with the EOS-1N is the type ECII screen (full-surface laser matte screen with fine spot metering mark), but EOS-1 focusing screens can also be used. The exchange procedure is the same as the EOS-1. For use of the existing Ec-A, B, I, L and K interchangeable focusing screens; please take note that when removing the focusing screen from the camera body to exchange it, direct the mount surface up before disconnecting the screen frame lock. If the lock is disconnected while the camera is placed forward (on its base) on a table, the screen frame may bounce when it descends to the removable position and the screen may be thrown out by the shock:

Focusing latch EOS-1N
Among Ec series interchangeable focusing screens, Ec-A, Ec-B, E-c-I and Ec-L are applicable only to fine spot metering and Centre-Weighted average metering. The microprism section in the center of these focusing screens becomes transparent and error occurs in the metering system under evaluative metering, partial metering and spot metering linked with the focusing point (A0: the central point is used). another notable point is, whichever screen is installed, the five focusing points will be clearly superimposed. The Ec-K Bright Laser-matte screen is about ore stop brighter than the Ec-CII screen.

F14 Tomcat (or F18 ?) taking off from a Super Carrier
Contact Andy Eames

Credit: Image courtesy of Andy Eames ® who has his Portfolio at Pbase. Image copyright © 2005. All rights reserved. Please respect the visual property of the contributing photographer.

The Canon Ec-Series Focusing Screens:- For Canon EOS-1N model:- Interchangeable (8 types available); standard screen: Ec-CII. For Canon EOS-1N RS model: -Interchangeable (8 screens) by a Canon Service Center. Type Ec-R installed as standard equipment. I don't have a focusing screen for the EOS-1N but I would assume it will come with a tool for user to mount the screen in place on the bracket. Anyway, as most often, photographers will tend to use their finger to perform change screen task and all I can advise is to handle this carefully.

Note: To remove dust from focusing screen or film chamber (apply to the lens, viewfinder eyepiece, mirror), gently blow the dust away using a commercially available bulb type blower. Avoid directly touching any of these surfaces. Do not wipe the screens, camera body or lens with any type of cleaner containing organic solvents. When further cleaning is necessary, consult your nearest Canon service center.

Eos-1N Focusing Screen EC-A


EOS-1N Focusing Screen EC-B




Focusing Screen Type Ec-A:

Standard Microprism General-purpose Laser-matte screen with a microprism at the center. It darkens when a lens slower than f/5.6 is used.


Focusing Screen Type Ec-B:

New Split General-purpose screen with a matte field and new split-image wedge at the center. Since there are two wedge angles, wedge darkening occurs less often.

EOS-1N Focusing Screen EC-CII


EOS-1N Focusing Screen EC-D




Focusing Screen Type Ec-CII:

Laser-matte Developed as the standard focusing screen for the EOS-1N. The Laser-matte field is bright, making it easy to discern sharp focus. At the center is a fine spot metering circle.


Focusing Screen Type Ec-D:

Laser-matte with Grid Six-millimeter-square grids are overlaid on a Laser-matte field. Ideal for close-up photography or with TS-E lenses. Horizontal- and vertical-line orientation and framing can be confirmed easily.

EOS-1N Focusing Screen EC-H


EOS-1N Focusing Screen EC-I




Focusing Screen Type Ec-H:

Laser-matte with Scale Vertical and horizontal scales on a Laser matte field make it easy to calculate the subject's magnification. Useful for visual records.


Focusing Screen Type Ec-I:

Laser-matte with Cross-Hair Reticle Special-purpose screen for photomicrography, astro-photography., and other applications when the EV is extremely low. The transparent cross hair reticle at the center uses parallax for focusing.

EOS-1N Focusing Screen EC-L


EOS-1N Focusing Screen EC-I




Focusing Screen Type Ec-L:

Cross Split Screen The cross-type, split-image prism at the center of the matte field bisects the image horizontally and vertically. The prism may darken during close-up shots.


Focusing Screen Type Ec-K:

Bright Laser-matte Special-purpose Laser-matte screen mainly intended for use with super telephoto lenses. It increases the viewfinder brightness by about one stop compared with the standard Laser-matte screen. Canon advises removable only by a qualified technician or via Canon Service Center only.

EOS-1N Focusing Screen EC-CII




Focusing Screen Type Ec-R (EOS-1N RS specific)

New Laser-matte Provided standard with the EOS-1N RS body, compensates for the decreased viewfinder brightness due to the low reflection factor of the pellicle mirror. When used with the EOS-1 N, viewfinder image is approx. one f/stop brighter compared to that when using the standard Ec-Cll.


(6) Built-in eyepiece shutter Because the sensitive SPD photo diode is placed inside the pentaprism which actually is very near the eyepiece, when the photographer is not having his eye leech to it for photo composition or shooting (like self timer operation or remote photography etc.), any strong light source from behind may affect the accuracy of the exposure reading. Thus, one of the addition of feature added to the EOS-1N from previous EOS-1 is a eyepiece shutter. The built-in eyepiece shutter prevents stray light from entering. It is not new and actually has been found on older MF Canon cameras such as Canon A1 back in 1978 ! But strangely, it was omitted in the EOS-1.

Using the Eyepiece Shutter To prevent metering errors caused by light entering the eyepiece when pressing the shutter button with your eye away from the viewfinder, close the eyepiece shutter before pressing the shutter button. Recommended when using the self-timer or making long time exposures. Push down the eyepiece shutter lever in the direction of the arrow to close the eyepiece shutter. Lift the lever in the opposite direction to open.

Others:- Normally. when an eyecup is installed on the eyepiece, the eyepiece shutter will be partially hidden (see inserted picture). Just slide it downward will close the eyepiece.

Eyecup Ec-II Made of hollow rubber soft to the touch. The rubber material is more durable than before. Locking hooks prevent it from falling off (see picture above). For long session shooting, investing a rubberized eye cup is a good investment because it is less stressful with your face/eye leeching onto the eyepiece.
Rubber Frame Ec A large rubber frame for mounting a dioptric adjustment lens onto the eyepiece. As with Eyecup Ec-II, the hollow rubber is soft to the touch around your eye.
Dioptric Adjustment Lens E (10 types) If the EOS-1 N's built-in dioptric correction feature is still inadequate, one of these dioptric adjustment lenses can be used. Available from -4 to +3 diopters. The lenses expand the EOS-1N's dioptric adjustment range to -6 to +5 diopters.

angle_finder_B.jpg rubber_frame.jpg Canon_magnifier_5_A.jpg
Angle Finder B Rubber Frame Ec Magnifier S

Carsten Ranke perspective at ground Zero

<<--- Low angle perspective, either you can make use of wide depth of field via use of small aperture + a wideangle lens to maximize the DOF. In the case of photo composition, a Angle Finder would be handy for such use.

Credit: Image courtesy of another good friend, Mr. Carsten Ranke®. This image was spotted via his Portfolio at Photonet. Image copyright © 2005. All rights reserved. Please respect the visual property of the contributing photographer.

Angle Finder B Diverts the viewfinder image by 90' to the camera eyepiece. The image is unreversed and right-side up. Convenient for low-angle shots, copy stand, duping, and close-up photography. Rotates for vertical and horizontal format shooting. Gives an upright image, the correct way round, for convenient composition. When used with EOS 5 or EOS 50 this finder requires use of the Canon Adapter Ed for Angle Finder B.
Magnifier S Magnifies the center of the viewfinder image by 2.5X. Useful for critical focusing in precision duping or close-up photography. The magnifier can also swing upward to reveal the entire viewfinder.

Relative:- Canon system accessories compatibility chart

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Background and Various Issues | The Basic Features & various Setup
Manual & Auto Focusing | Metering Systems | Exposure Control | Viewfinder Optical
Flash Photography (with Speedlite 540EZ extension & Selective info on Canon TTL Flash Models:-160E | 200E | 300EZ | 300TL | 420EZ | 430 EZ | 480EG | Macrolite | Other non-TTL Canon flash model

Reliability Issues:- Body Chassis | Shutter Unit | Electronic Circuitry | Film Transport & film handling Secondary Functions:- Custom Function Part One | Part Two | System Accessories:- Film Back Options - instruction for Command Back E1 | Macro/Close Up Part one | Part two and Part III Flash for Macro-Photography | Power Sources -BP-E1 | PDB-E1 | Focusing Screens | Remote Control with Wireless Remote Set LC-3 | System compatibility

Variants of Canon EOS-1N:- Canon EOS-1N RS | Canon/Kodak Digital DCS-1, 3 -5 & 520/560 Series | Full Technical Specification | Main Reference Map / Nomenclature | Resource Centre:- Comparative Charts between EOS-1 & EOS-1N / or with its active Competition(s) (Nikon); Quick Operational Reference Card (278k Gif File); Listings of 7-segment digital numbers/letters appeared on LCD display panel/viewfinders (HTML page); External Link:-Instruction Manual (3.3MB PDF file applicable for both Canon EOS-1N (RS). | Using EOS system for your photography | Bots & Nuts of EOS System - by Philip Chong |

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