2024年2月25日发(作者：宫丁兰)
Introduction
The Canon EF 100mm f/2.8 USM macro was introduced back in march 2000 replacing the old EF 100mm f/2.8 macro (featuring a classic
micro motor). On APS-C DSLRs the field-of-view resembles a 160mm full format equivalent. The primary application of the lens is, obviously,
macro photography but it's not limited to that - infinity focus is possible.
Note: the image above shows the lens with an (optional) filter attached and the (also optional) lens hood has been cut down in length.
The lens has been completely redesigned into a true IF (internal focus) construction that does not extend when focusing to macro distances.
This is highly unusual for a 100mm macro lens. The front element does not rotate so using a polarizer is not problem. Typical for ring-type
USM lenses full-time manual override is always possible in one-shot AF mode. The AF speed is blazingly fast (another unique point) but
Canon still provided a focus limiter in order to avoid any AF hunting into the extreme macro range when operating the lens at normal focus
distances. The minimal focus distance is 0.31m (149mm working distance) resulting in a max. magnification of 1:1. The broad, rubberized
focus ring and has smooth, pleasant operation. The build quality is very decent with a metal mount and an outer barrel made of good quality
plastics. The optical construction is made of 12 elements in 8 groups without any special elements. The lens features 8 aperture blades.
Typical for all true macro lenses it features a floating system in order to achieve a constant performance throughout all focusing distances.
The filter size is 58mm. With a weight of 600g and a size of 79x119mm it is fairly compact and about comparable to the rest of the gang in
this class.
It also a possible to use an optional tripod mount which can be attached to the rear of the lens. While not really required the tripod mount
provides a better balance - otherwise the camera lens combination tends to be somewhat front loaded specifically when used on light-weight
DSLRs.
Distortions
As expected for a fix-focal lens and especially for a macro lens the level of distortions is absolutely negligible.
The chart above has a real-world size of about 120x80cm.
Vignetting
On the EOS 350D with its reduced format (APS-C) the (full format) lens exhibits moderate vignetting at f/2.8 which disappears from f/4 &
up. Expect more vignetting on 1.3x or full frame cameras.
MTF (resolution)
The lens was tested twice but only to obtain data beyond f/8 which was missing in the first review. The MTF differences between the two
tested samples are insignificant.
Typical for most macro lenses the EF 100mm f/2.8 USM macro performed highly impressive in the lab. The lens is already very good in the
center at wide-open aperture with marginally worse corners. The lens reaches its peak performance at f/5.6. You shouldn't stop down
beyond f/16 due to the limiting effects of light diffraction.
Below is a simplified summary of the formal findings. The chart shows in line widths per picture height (LW/PH) which can be taken as a
quantity for sharpness. If you want to know more about it you may check out the corresponding Imatest Explanations.
The quality of the bokeh (the fore-/background blur at large apertures) is very smooth. You need to be a little careful regarding lens flare
with this lens - using the hood is a good idea especially with streaking light.
Chromatic Aberrations (CAs)
Similar to most other fix-focal lenses chromatic aberrations (color shadows at harsh contrast transitions) are very low and nothing to worry
about.
Sample Shots
Ok, finally here're some sample shots taken with the EOS 350D (converted RAWs).
Click on a thumbnail to view the original file (opens in a separate window). Please note that the originals are FULL SIZE samples (=several
megabytes) thus requiring a significant amount of bandwidth so please take care of the limited resources here.
Make Canon Make Canon
Model Canon EOS 350D Model Canon EOS 350D
DIGITAL DIGITAL
ISO Speed 400 ISO Speed 400
Focal 100.0mm Focal 100.0mm
Length Length
Exposure f/2.8 @ 1/3200s Exposure f/9.0 @ 1/500s
Data: Data:
Size 2304x3456 Size 2304x3456
Make Canon Make Canon
Model Canon EOS 350D Model Canon EOS 350D
DIGITAL DIGITAL
ISO Speed 400 ISO Speed 400
Focal 100.0mm Focal 100.0mm
Length Length
Exposure f/10.0 @ 1/400s Exposure f/6.3 @ 1/640s
Data: Data:
Size 2304x3456 Size 2304x3456
Verdict
The old EF 100mm f/2.8 macro lens had a superb reputation but Canon managed to keep up the performance of the USM successor despite
of the introduction of a true IF design allowing to keep a constant lens length throughout the focus range. Mechanically this is a drastic
improvement due to the absence of any moving outer parts that could suck in dust or wear out more easily. On top of that the USM
implementation in this lens is excellent - compared to conventional macro lenses in this range it is a speed daemon here and a near silent
one. Optically the lens resides on a very high level with little to nothing to be desired. HIGHLY recommended!
Optical Quality:
Mechanical Quality:
Price/Performance:
2024年2月25日发(作者：宫丁兰)
Introduction
The Canon EF 100mm f/2.8 USM macro was introduced back in march 2000 replacing the old EF 100mm f/2.8 macro (featuring a classic
micro motor). On APS-C DSLRs the field-of-view resembles a 160mm full format equivalent. The primary application of the lens is, obviously,
macro photography but it's not limited to that - infinity focus is possible.
Note: the image above shows the lens with an (optional) filter attached and the (also optional) lens hood has been cut down in length.
The lens has been completely redesigned into a true IF (internal focus) construction that does not extend when focusing to macro distances.
This is highly unusual for a 100mm macro lens. The front element does not rotate so using a polarizer is not problem. Typical for ring-type
USM lenses full-time manual override is always possible in one-shot AF mode. The AF speed is blazingly fast (another unique point) but
Canon still provided a focus limiter in order to avoid any AF hunting into the extreme macro range when operating the lens at normal focus
distances. The minimal focus distance is 0.31m (149mm working distance) resulting in a max. magnification of 1:1. The broad, rubberized
focus ring and has smooth, pleasant operation. The build quality is very decent with a metal mount and an outer barrel made of good quality
plastics. The optical construction is made of 12 elements in 8 groups without any special elements. The lens features 8 aperture blades.
Typical for all true macro lenses it features a floating system in order to achieve a constant performance throughout all focusing distances.
The filter size is 58mm. With a weight of 600g and a size of 79x119mm it is fairly compact and about comparable to the rest of the gang in
this class.
It also a possible to use an optional tripod mount which can be attached to the rear of the lens. While not really required the tripod mount
provides a better balance - otherwise the camera lens combination tends to be somewhat front loaded specifically when used on light-weight
DSLRs.
Distortions
As expected for a fix-focal lens and especially for a macro lens the level of distortions is absolutely negligible.
The chart above has a real-world size of about 120x80cm.
Vignetting
On the EOS 350D with its reduced format (APS-C) the (full format) lens exhibits moderate vignetting at f/2.8 which disappears from f/4 &
up. Expect more vignetting on 1.3x or full frame cameras.
MTF (resolution)
The lens was tested twice but only to obtain data beyond f/8 which was missing in the first review. The MTF differences between the two
tested samples are insignificant.
Typical for most macro lenses the EF 100mm f/2.8 USM macro performed highly impressive in the lab. The lens is already very good in the
center at wide-open aperture with marginally worse corners. The lens reaches its peak performance at f/5.6. You shouldn't stop down
beyond f/16 due to the limiting effects of light diffraction.
Below is a simplified summary of the formal findings. The chart shows in line widths per picture height (LW/PH) which can be taken as a
quantity for sharpness. If you want to know more about it you may check out the corresponding Imatest Explanations.
The quality of the bokeh (the fore-/background blur at large apertures) is very smooth. You need to be a little careful regarding lens flare
with this lens - using the hood is a good idea especially with streaking light.
Chromatic Aberrations (CAs)
Similar to most other fix-focal lenses chromatic aberrations (color shadows at harsh contrast transitions) are very low and nothing to worry
about.
Sample Shots
Ok, finally here're some sample shots taken with the EOS 350D (converted RAWs).
Click on a thumbnail to view the original file (opens in a separate window). Please note that the originals are FULL SIZE samples (=several
megabytes) thus requiring a significant amount of bandwidth so please take care of the limited resources here.
Make Canon Make Canon
Model Canon EOS 350D Model Canon EOS 350D
DIGITAL DIGITAL
ISO Speed 400 ISO Speed 400
Focal 100.0mm Focal 100.0mm
Length Length
Exposure f/2.8 @ 1/3200s Exposure f/9.0 @ 1/500s
Data: Data:
Size 2304x3456 Size 2304x3456
Make Canon Make Canon
Model Canon EOS 350D Model Canon EOS 350D
DIGITAL DIGITAL
ISO Speed 400 ISO Speed 400
Focal 100.0mm Focal 100.0mm
Length Length
Exposure f/10.0 @ 1/400s Exposure f/6.3 @ 1/640s
Data: Data:
Size 2304x3456 Size 2304x3456
Verdict
The old EF 100mm f/2.8 macro lens had a superb reputation but Canon managed to keep up the performance of the USM successor despite
of the introduction of a true IF design allowing to keep a constant lens length throughout the focus range. Mechanically this is a drastic
improvement due to the absence of any moving outer parts that could suck in dust or wear out more easily. On top of that the USM
implementation in this lens is excellent - compared to conventional macro lenses in this range it is a speed daemon here and a near silent
one. Optically the lens resides on a very high level with little to nothing to be desired. HIGHLY recommended!
Optical Quality:
Mechanical Quality:
Price/Performance: