PhotoNotes Camera Lookup Results.

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This is a basic feature comparison between two camera models - the Canon EOS 1 and the Canon EOS RT.

Canon EOS 1:

The first serious professional camera in Canon’s EOS lineup, the EOS 1 was the first model to demonstrate the tremendous potential of the EOS line. It lay the groundwork for both the EOS 1 style and interface and for the technology that trickled down the EOS lineup over the next decade.

Sturdy and rugged, the 1 is somewhat lacking in features by today’s standards. It only has one autofocus point, it lacks FEC controls, doesn’t support E-TTL and so on. However EOS 1 bodies can be readily found on the used market at quite low prices and still remain tough and reliable workhorses. Note that the EOS 1 HS was an EOS 1 with a Power Drive Booster E1 added on.

Canon EOS RT:

The RT, or real-time, was essentially an EOS 600/630 with a fixed pellicle mirror in place of the standard hinged mirror mechanism. This fixed design allowed the camera to shoot at a very high speed with a minimum of shutter lag. An interesting historical piece, but not as useful as contemporary EOS bodies these days. Autofocus, being as it is one of the first Canon cameras to support the feature, is slow at locking in. Its interface in particular is not as well developed as contemporary cameras. A number of important buttons are hidden behind a little door, for example. Very solid and hefty, though. And useful for astrophotography, since its shutter requires no power to stay open. QD (quartz date back) version was available.

  Canon EOS 1 Canon EOS RT
Camera medium type 35mm film 35mm film
European/Australasian name EOS 1 EOS RT
North American name EOS 1 EOS RT
Japanese name EOS 1 EOS RT
Asian name EOS 1
Date introduced September 1989 October 1989
Date discontinued
Marketing position when introduced Top of the line Speciality
Physical body Canon EOS 1 Canon EOS RT
Body type and material Plastic shell over diecast aluminium frame, anti-slip fake leather Plastic and metal
Body build quality Excellent Hefty and solid
Body colour Black Black
Lens mount type Canon EF Canon EF
Lens mount material Stainless steel Stainless steel
Dimensions (width, height, depth) 161 x 107 x 72mm 148 x 108 x 68mm
Relative size Big Medium-sized
Weight 890g (with battery) 660g
Weatherproofing None None
Flash weatherproofing with supported flash units
Exposure settings Canon EOS 1 Canon EOS RT
Basic (icon) modes None P1: Standard, P2: Quickshot, P3: landscape, P4: sports, P5: portrait, P6: macro, P7: Indoor
Program AE (P), aperture priority (Av), shutter speed priority (Tv), and manual (M) modes P, Av, Tv, M, DEP P, Av, Tv, M, DEP
Metering types Evaluative, partial, spot, centre-weighted averaging Evaluative, partial
iFCL: Dual layer (red/green and green/blue) metering sensor
Manual selection of metering types Yes
Evaluative metering zones 6 6
Partial metering size 5.8% 6.5%
Spot metering size 2.3% n/a
Multi-spot metering No No
Manual exposure metering Yes Yes
Manual exposure metering display Simulated matchneedle Annoying Op, OO or CL display (open aperture wider, correct setting, or close it down)
Metering (not autofocus) range at 20°C, ISO 100 EV 0-20 (EV 2-20 with spot metering) EV 1-20
Shiftable DEP mode
Exposure setting increments 1/3 stop increments 1/2 stop
Exposure compensation increments 1/3 stop increments 1/2 stop
Auto-exposure (AE) lock Yes Yes
Single-shot AE/AF lock retention (keep shutter release halfway)
Multiple exposures Yes; up to 9 exposures Yes; up to 9 exposures
Auto exposure bracketing (AEB) +/-3 EV in 1/3 stop increments +/- 5 stops in 1/2 stop increments
Tv/Av safety shift to reduce overexposure No
ISO safety shift
Camera shake warning Optional beeper if shutter speed lower than reciprocal of focal length
Stop-down metering for manual-only lenses
ISO (film speed/sensor sensitivity) Canon EOS 1 Canon EOS RT
Manual ISO range ISO 6-6400 ISO 6-6400
DX-encoded ISO range (film only) ISO 25-5000 ISO 25-5000
Automatic ISO selection in icon modes (digital only)
Always displays ISO setting in viewfinder
Dedicated ISO button
Displays ISO setting in viewfinder when ISO button pressed
Digital image processing Canon EOS 1 Canon EOS RT
Highlight tone priority (D+)
Auto lighting optimizer
High ISO speed noise reduction
Peripheral illumination correction
Peripheral illumination correction database
Ambience effect
Creative filters
Focus Canon EOS 1 Canon EOS RT
Autofocus points 1 1
Additional “invisible” AF points No No
Cross sensors 1 0
Autofocus modes One-shot AF, AI servo AF, AI focus AF, manual focus One-shot AF and predictive AI Servo AF with release priority
Autofocus point expansion (verifies surrounding points if AF cannot be achieved)
Zone autofocus (enables multiple points as a cluster)
Spot (reduced area of points) autofocus
Manual selection of AF modes Yes
AF limit of linear sensors f/5.6
High precision limit of cross sensor(s) f/2.8
Focus point illumination None No
Autofocus speed Fast Slow
Eye control focus (ECF) No No
Autofocus beep confirmation
AE lock button can lock focus separately (sometimes known as CF 4) No
Dedicated rear-panel autofocus start (AF-ON) button
Low-light autofocus abilities (AF working range) at 20°C, ISO 100 EV 1-18 EV 1-18
Manual autofocus micro-adjustment
IS (image stabilization) compatible The viewfinder may shake slightly after photo taken if IS is engaged. This is distracting but does not affect the image. With AF off IS may disengage. The viewfinder may shake slightly after photo taken if IS is engaged. This is distracting but does not affect the image. With AF off IS may disengage.
Teleconverter (TC) compatible
Tilt-shift (TS-E) lens compatible
EF-25 (25mm extension tube) compatible Camera incompatible with EF25 when using spot metering only Exposure compensation may be required
Autofocus Assist Canon EOS 1 Canon EOS RT
Body integral patterned red autofocus assist light No No
Incandescent white AF assist light No No
Pulses built-in flash annoyingly to serve as AF assist light No No
Can use external Speedlite AF assist Yes Yes
Can disable internal AF assist No
Can disable Speedlite AF assist No
Can disable internal and Speedlite AF assists independently
Flash support Canon EOS 1 Canon EOS RT
Maximum flash sync shutter speed (X-sync) 1/250 sec 1/125 sec
Type A or Type B camera body Type B camera (TTL flash metering) Type B camera (TTL flash metering)
TTL flash metering Yes Yes
TTL flash metering zones 1
A-TTL flash metering Yes Yes
E-TTL flash metering No No
E-TTL II flash metering No No
FP (high speed sync) mode No No
Built-in flash unit No No
    Guide number of built-in flash (metres, ISO 100)
    Maximum coverage of built-in flash
    Built-in flash can auto pop-up
    Built-in flash can auto lower
    Built-in flash has zoomable flash head
    Built-in flash zoom detents
    Tall built-in flash
    Manual output control of built-in flash
    MULTI (stroboscopic) mode for built-in flash
Wireless E-TTL No No
    Built-in flash can serve as wireless E-TTL controller
    Supports wireless E-TTL group C when using built-in flash as master
    Wireless E-TTL ratios No No
Flash exposure compensation (FEC) for internal flash No No
FEC for external flash No No
FEC scale in viewfinder No No
Flash exposure lock (FEL) button No No
FEL icon in viewfinder
Supports Speedlite modelling light No No
Flash exposure bracketing (FEB) Yes
Can communicate digital subframe size to flash unit
Menu control over external Speedlites (with compatible flash units)
Can control flash unit custom functions (with compatible flash units)
Auto fill-flash can be disabled No
Flash hotshoe painted or bare metal
PC (studio flash) socket built in Yes No
Supports high voltage (maximum 250 volts; not 6) studio flash No
Supports second-curtain sync Yes Yes
Second-curtain sync custom function No No
Redeye reduction lamp No No
Viewfinder Canon EOS 1 Canon EOS RT
Viewfinder quality Excellent Average
Eye level pentaprism/pentamirror Pentaprism Pentaprism
Viewfinder coverage of frame 100% 94%
Viewfinder magnification (-1.0 dioptre w/ 50mm lens at infinity) 0.72x 0.8x
Built-in dioptric adjustment Yes, +/- 2 dioptres -1 dioptre
Eyepoint 20mm 19.3mm
Eyepiece shutter No
Viewfinder display information AF mark, in-focus dot, spot meter circle, partial meter circle, shutter speed, aperture, AE lock, manual exposure, flash read, exposure compensation, exposure level, remaining frames Autofocus mark, in focus indicator, partial metering circle, manual, partial metering display (AE lock), shutter speed, aperture setting, depth-of-field AE, flash ready, and exposure compensation.
Default viewfinder focus screens New Laser Matte New Laser Matte
Viewfinder proximity sensor (turns off LCD when using viewfinder)
FEC scale on side of image in viewfinder No No
On-demand grid in optical viewfinder
Interchangeable viewfinder focus screens 7 available from Canon See footnote at the end of this document.
Depth of field preview Yes Dedicated button
Shutter and mirror Canon EOS 1 Canon EOS RT
Maximum shutter speed 1/8000 sec 1/2000 sec
Minimum shutter speed 30 sec 30 sec
Bulb mode Yes Yes
Camera maximum aperture range (available aperture range is lens dependent)
Shutter release lag time 8 ms
Shutter life expectancy
Mirror blackout time
Fixed pellicle mirror No No
Active mirror control No No
Rotary magnet (low power) shutter No No
Mirror lockup No
Mirror prefire (sort of lockup) No No
Self-timer Yes 10 sec, with flashing red light
Continuous (multiple shot) self-timer
Built-in intervalometer (interval timer) No No
Intervalometer through external computer interface No No
Film motor drive Canon EOS 1 Canon EOS RT
Motor drive speed (frames per second) 2.5 fps 5 fps (3 fps in AI Servo)
Framerate with booster
Motor drive sound Loud
Supports mid-roll rewind Yes Yes
Custom function to leave the leader out on rewind Yes No
Film winding type - standard or prewind Standard Standard
Other film-related features Canon EOS 1 Canon EOS RT
Interchangeable backs Two optional backs were made available - Quartz Date Back E (a simple time-printing clock) and the feature-packed Technical Back E, which supported all kinds of programmability, including an optional keyboard and interfaces to MSX and MS-DOS computers.
Date-printing back No
Fake panorama masking No
Optional leader-out rewind Yes No
Barcode reader for loading shooting modes No No
Computer interface for recording shooting data No Using Technical Back E only
Data printing on film leader (frame zero) No No
Compatible with high-speed infrared film Yes Yes
Body and controls Canon EOS 1 Canon EOS RT
Rear (quick control) dial Yes No
Customizable function (C) mode dial setting No No
Lockable top-deck mode dial (press to turn)
Rear cursor buttons No No
Multi-controller joystick No No
Multi-controller built into rear dial
M.Fn button by shutter release button
Film transport and metering controls operable by feel (lever position) No
Power-on time
Batteries One 2CR5 lithium One 2CR5 lithium
Battery charger
AC adapter
Official shooting capacity per charge
Battery increments in LCD
Backup battery (for date/time, etc)
Battery door
Wired remote socket Canon-proprietary T3 type None (Canon-proprietary T3 type only available with optional GR-20 handgrip)
Compatible wired remotes Canon Remote Switch RS-60T3 and Wireless Controller Set LC-3. Unlike the more widely supported N3 and E3 (2.5mm minijack) connectors, the T3 is something of an orphan connector type Canon Remote Switch RS-60T3 and Wireless Controller Set LC-3. Unlike the more widely supported N3 and E3 (2.5mm minijack) connectors, the T3 is something of an orphan connector type
Compatible with RC-1, RC-5 wireless remotes No No
Tripod socket aligned to centre line of lens mount
Tripod socket material
Backlit topdeck standard LCD No
Standard LCD size and position Top deck Right side of top deck
Secondary LCD
Standard top-deck mode dial No
Handgrip Power Drive Booster E1 GR-10 (Grip L; large), GR-20 (included T3 remote socket), GR-30 (same as GR-20 but without socket)
Optional case Semi-hard case S (standard lenses), Semi-hard case L (long lenses), Semi-hard case LL (longer lenses)
Custom functions Yes See footnote at the end of this document for full custom function list for this camera.
Personal functions
  Canon EOS 1 Canon EOS RT

Interchangeable viewfinder screens available for the Canon EOS RT:

7 were available from Canon. Microprism collar, new split circle, new laser matte with AF frame, laser matte with grid, laser matte with scale, double cross-hair reticle, cross split image.

Custom functions for the Canon EOS RT:

1: Film rewind starts automatically at the end of the roll; doesn’t start.
2: Film leader rewound inside cartridge; film leader stays out.
3: Film speed read by DX code; manual setting of film speed.
4: Autofocus starts when shutter button pressed halfway; AF starts when partial metering button pressed.
5: Manual mode: shutter speed set by M button or LCD light button and input dial, or aperture set by M button and light button, and electronic input dial; electronic dial only.
6: Camera shake warning on/off.
7: Manual focus adjustments for USM lenses when lens set to M; allow manual touchup to AF.
8: Metering: evaluative/centre-weighted averaging.
9: Flash sync: automatic/locked at 1/125 sec.
10: Continuous wind: normal/activate by pressing shutter release and light buttons.
11: Next exposure will fire without re-metering/requires re-metering to shoot again.
12: Continuous shooting: no limits/limited to 3 shots.
13: Reset required after multiple exposures/not required.
14: 8 ms "real-time" shutter lag/40ms shutter lag.
15: Reset all custom functions.

User-contributed reviews.

Canon EOS 1

User reviews from the PhotoNotes discussion forum are available.

Canon EOS RT

User reviews from the PhotoNotes discussion forum are available.

Product names

A note about names. The reason certain camera bodies may have multiple names is because Canon often use different model names for different regional markets. This usually applies only to consumer and some midrange products, and mainly to the USA and Japan. Whereas the international name is usually just a number or number/letter combination, the USA name will often be some cool or tough-sounding name such as “Rebel”. Canon Japan, on the other hand, typically use cute marketing names such as “Kiss” for their consumer products. Under certain rare circumstances there may be actual differences between the differently named products. For example, Japanese versions of the product may support wireless remotes whereas other versions may not.

In addition, note that date-back equipped versions of many film bodies are and were available, often with QD (quartz date) or DATE added to their product names. Japanese versions of consumer and midrange film cameras, however, almost always have date printing as a standard feature.

I generally organize the information by the European/Australasian name, since it’s usually a logical numeric system. Basically, the fewer the digits the more expensive the camera. Thus the 1000 cameras are consumer, the 100 cameras are advanced amateur, the 10, 5 and 3 cameras are semi-professional and the 1 cameras are professional. The terms “consumer” and “professional” aren’t judgement terms here - just Canon’s descriptions of the market segments to which the cameras are aimed.


This page was generated automatically from a comparison database. There is no guarantee that this information is entirely free from error, given the fact that the database is frankly pretty huge and was compiled entirely by hand. Please notify me using my feedback form if you notice any inaccuracies.

Information was derived from a number of sources, including Canon news releases, the Canon Camera Museum and various manufacturer-supplied product manuals.

This information is accurate to the best of my knowledge, but I cannot take responsibility for purchasing decisions you may make.


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