Canon EOS Lens Notes
Database of current lenses for Canon EOS
The following database and sort orders may be useful for identifying
lenses of interest.
Be sure to check other sources for expert knowledge and experience
with specific lenses, e.g.,
Quick recap of known trade offs:
- speed - max aperture - Lens speed is critical for many
reasons - low light conditions,
action photography, telephoto sharpness, flash range, viewfinder
brightness,
autofocus, etc.
Faster lenser are typically bigger, heavier, and more expensive.
Larger aperture will give you shorter Depth of Field (DOF).
Aperture decreases with increasing f-stop number,
and one stop is a factor of 1.4 (square-root of 2).
- focal length - shutter speed -
Longer focal length corresponds to narrower angle of view and higher
magnification, with tradeoffs in either speed or the weight of larger
glass elements. Blurring due to camera shake increases with focal
length.
To minimize blur due to camera shake, a rule of thumb is to use a
shutter speed
that is at least as fast as the inverse of the focal length,
e.g. 1/200 sec for a 200mm telephoto lens.
Exposure is linear, a factor of 2 in shutter speed corresponds to an
f-stop in
terms of overall light.
- zoom ratio -
A zoom lens covers a range of focal lengths.
Zoom ratio is the longest focal length divided by the shortest focal
length.
Extreme zooms have trade offs in speed, size, weight, cost,
barrel/pin-cushion distortion, sharpness, chromatic aberration, etc.
It's easier to design a single-focal-length "prime" lens with
high image quality (IQ) for all of the above.
Zoom lenses are convenient to avoid switching lens or bodies,
especially for
action photography.
- image stabilization - Image stabilization (IS) compensates
for camera shake to reduce blurring,
typically two-stops with Canon 1st generation IS and Sigma OS
and up to three-stops with Canon newest genation.
IS is different from speed - it won't stop the motion of sports, but it
is
very valuable for clear non-blurry image quality.
Generations of IS are not clearly defined by Canon, so I've assigned
the
following keys for the database:
- IS2 - 2 f-stop correction, (no panning mode, no tripod
detection) -
e.g., EF 75-300mm f/4-5.6 IS USM, EF 28-135 f/3.5-5.6 IS USM
- IS2P - 2 f-stop correction, panning mode (no tripod
detection) - e.g.,
EF 300mm f/4L IS USM, EF 100-400mm f/4.5-5.6L IS USM
- IS2PT - 2 f-stop correction, panning mode, tripod-detection -
e.g.,
super-tele's
- IS3 - 3 f-stop correction, (no panning mode, no
tripod-detection),
e.g., EF-S 17-85mm f/4-5.6 IS USM
- IS3PT - 3 f-stop correction, panning mode, tripod-detection,
e.g., EF
70-200mm f/2.8L IS USM, EF 28-300mm f/3.5-5.6L IS USM, DO lenses
Canon uses gyro-stabilized floating elements in the lens for image
stabilization.
Minolta shifts the CCD sensor for their Anti-Shake technology.
Note that the manufactures have multiple lines ranging from
professsional to
mass-market consumer.
While the following are some general comments on the major
manufacturers,
each lens is an individual design which should be researched, tested,
and
judged on individual merits and tradeoffs matched to your shooting
needs.
- Canon
- Canon is recognized for high image quality in
their professional L
series,
especially for the exceptional super-telephoto lenses.
Many non-L series lenses also have high image quality.
Thirteen lenses have image stabilization.
Focus is accurate, and USM is very fast.
According to the Canon EF Lens
Specification & Accessories Table,
Full-Time Manual focus is available on most Ring USM lenses,
and distance
data for E-TTL II flash
is provided on many Ring USM lenses and a couple Micro USM lenses.
Based on a couple of lenses that I have examined, I think that the
table
has omission errors, and that nearly all current Ring USM lenses have
both
Full-Time Manual focus and also distance data for E-TTL II flash,
the exception being the 85mm f/1.2 that does not have distance data.
Canon sets the standard for the other manufacturers with
full lens lines,
high image quality,
very good but heavy construction,
and the high premium price of the camera manufacturer.
Some lenses in the economical consumer line also have good image
quality
and are lighter due to plastic construction.
- Sigma
- Sigma is recognized for high image quality in
selected lenses;
the EX line is their professional line.
One lens has optical stabilization.
Focus can be problematic as Sigma has their own non-licensed chips
based on
reverse engineering.
Sigma will rechip lenses, but focus may still be hit-or-miss.
HSM is fast; non-HSM focus is slow.
Sigma has a comprehensive and innovative lens lines,
including the 50-500mm "Bigma", exceptional macro lenses,
and full spectrum of prime and zoom lenses.
Many lenses rival Canon in image quality,
construction and weight is variable,
and price is substantially lower than Canon.
- Tamron
- Tamron is recognized for the high image quality
of their SP line.
Focus is
accurate as Tamron seems to do better reverse engineering than Sigma,
but focus is slow without USM or HSM equivalent,
and very slow on some lenses.
Tamron has fewer lenses than Canon or Sigma,
but the SP lenses are very good,
and the hyper-zooms are convenient.
Construction is generally lighter,
and price is substantially lower than Canon.
- Tokina
- Tokina has a small lens catalog.
Image quality is good for some lenses.
Focus is very slow.
Construction is OK,
and price is substantially lower than Canon.
- Other
- Phoenix, Quantaray, Vivitar, etc. - These are consumer/budget
lenses with
relatively low image quality and light construction, sometimes OEM
versions
of the consumer lenses from a major manufacturer.
In general they are not recommended; stick with the major manufacturers
above.
The following links try to present lenses organized by various factors,
targeted towards various purposes.
Make sure to note that some records are incomplete, so the results of
the formula may be zero and these records often appear first.
Always use additional sources for more definitive reports including
actual experience.
You can search the database using the query field,
and use the menus to reorder fields, to sort by a field, or to hide a
field.
Link |
Title |
Query|Sort|Formula |
Description |
lenses
|
lens database |
make,mmw,mmt |
full database ordered by make, focal length wide, and focal
length tele |
recommend
|
recommended lenses |
recommended |
recommendations extracted from forums, specs, and IQ tests,
sorted by
tele reach, then price, limited to somewhat less than $2000 |
Canon
L |
L-series lenses |
model=L |
Canon L-series quality lenses |
Sigma
EX |
EX lenses |
model=EX |
Sigma EX quality lenses |
Tamron
SP |
SP lenses |
SP |
Tamron Super Performance quality lenses |
APS-C
|
APS-C lenses |
model=EF-S|DC|Di-II|DX |
1.5x FOV crop "digital" lenses - Canon EF-S, Sigma DC, Tamron
Di-II,
Tokina DX |
wide
|
wide angle |
mmw |
|
tele
|
telephoto |
-mmt,f_t,-mmw,f_w |
sorted by tele reach, then aperture, then primes over zooms |
tele-light
|
telephoto-light |
-mmt,oz |
sorted by tele reach, then weight |
macro
|
macro lenses |
model=Macro |
sorted by mag (1:mag) and focus |
IS
|
IS/OS lenses |
model=IS|OS |
Image Stabilization lenses |
speed
|
speed |
f_w |
|
zm
|
zoom |
-zm |
|
walk
|
walk-around "weightiness" |
oz/zm |
weight in ounces / zoom ratio |
sport
|
telephoto speed |
200*f_t/mmt |
200 * telephoto aperture / telephoto focal length |
stab
|
telephoto stability |
200*(f_t - IS)/mmt |
200 * (telephoto aperture / IS-stops) / telephoto focal
length |
hike
|
"weighted" telephoto stability |
stab*oz |
stab * weight in ounces |
budget
|
budget sport |
sport*price |
sport * B&H price |
overall
|
budget "weighted" sport |
sport*price*oz |
sport * B&H price * weight in ounces |
test
|
optical quality |
test |
Lens
Test Guide - 5.00 excellent 4.25 very good 3.75 good 3.25 average
2.75 sub-average 2.25 poor (e.g., between 4.25 and 5.0 is excellent) |
gjm
|
my lenses |
mmw |
my lenses at present |
sold
|
my previous lenses |
mmw |
my previous lenses, sold |
wish
|
my wish list |
mmw |
potential buys and other interesting lenses |
Database columns:
make |
manufacturer |
model |
lens model/description |
mmw |
focal length wide in mm |
mmt |
focal length tele in mm |
zm |
zoom ratio |
w16 |
focal length wide * 1.6 |
t16 |
focal length tele * 1.6 |
f_w |
aperture wide |
f_t |
aperture tele |
IS |
image stabilization adjustment in fstops |
price |
price (B&H, Adorama, etc.) |
oz |
weight in ounces |
gm |
weight in grams |
len |
length in inches |
lmm |
length in mm |
di |
max diameter in inches |
dmm |
max diameter in mm |
fltr |
filter size in mm, some rear |
focus |
minimum focus in inches |
focmm |
minimum focus in mm |
mag |
maximum magnification |
af |
AutoFocus Actuator, Full-Time Manual focus ((FTM) - added
contrary to table) |
dd |
distance data capability, e.g., for E-TTL II flash ((dd) -
added contrary to table) |
date |
date marketed |
test |
test optical quality |
walk |
walk-around "weightiness" |
sport |
telephoto speed |
stab |
telephoto stability |
hike |
weighed telephoto stability |
budget |
priced telephoto speed |
overall |
priced-weighted telephoto speed |
comment |
corrections, IS key, nickname, etc. |
NoBell Home - gjm - last
update 10/17/2006, created 2/28/2005