Hi all - Im trying to decide whether to buy the Canon 100-400 f4.5 - 5.5 L or to go for something else/similar like the 70-300.
It will be paired with my 550d.
My uses will be:
Motorsport (BSB, BTCC, MotoGP, WSB, DTM) at Brands, Thruxton and Silverstone
Wildlife - Big cats and birds
Ive been very tempted by this lens but before shelling out a grand or so for it i decided to hire it.
My first impression were that it was good, but perhaps a little soft? This might be due to the fact that i had to shoot at 7.1 or below because it was a really really dull day.
I have a few questions that I would really appreciate some thoughts on:
- The date code is UW091. Which i think is 2008? Is this significant to its performance?
- I found the lens good at focusing, but im used to photgraphy bikes, so does anyone know how this lens performs on a crop camera for superbikes? (faster and smaller!!)
- Any comments on the pictures?
Any constructive critisism of advice is really appreciated.

Rob Collard #8 - Ebay Motors - BMW320 by bdigital101, on Flickr

James Colburn #2 - Slamming on the anchors by bdigital101, on Flickr

Gorden Sheddon #52 - Honda Yuasa Racing Team - Honda Civic by bdigital101, on Flickr

Andrew Jordan #77 - Pirtek Racing - Honda Civic by bdigital101, on Flickr

Gorden Sheddon #52 - Honda Dynamics - Honda Civic by bdigital101, on Flickr
It will be paired with my 550d.
My uses will be:
Motorsport (BSB, BTCC, MotoGP, WSB, DTM) at Brands, Thruxton and Silverstone
Wildlife - Big cats and birds
Ive been very tempted by this lens but before shelling out a grand or so for it i decided to hire it.
My first impression were that it was good, but perhaps a little soft? This might be due to the fact that i had to shoot at 7.1 or below because it was a really really dull day.
I have a few questions that I would really appreciate some thoughts on:
- The date code is UW091. Which i think is 2008? Is this significant to its performance?
- I found the lens good at focusing, but im used to photgraphy bikes, so does anyone know how this lens performs on a crop camera for superbikes? (faster and smaller!!)
- Any comments on the pictures?
Any constructive critisism of advice is really appreciated.

Rob Collard #8 - Ebay Motors - BMW320 by bdigital101, on Flickr

James Colburn #2 - Slamming on the anchors by bdigital101, on Flickr

Gorden Sheddon #52 - Honda Yuasa Racing Team - Honda Civic by bdigital101, on Flickr

Andrew Jordan #77 - Pirtek Racing - Honda Civic by bdigital101, on Flickr

Gorden Sheddon #52 - Honda Dynamics - Honda Civic by bdigital101, on Flickr