Telephoto zoom lens for Motorsport & Wildlife 1k budget - Your advice please
--------------------------------------------------------------------------------
Hi everyone, I am after some help & advice. I have tried my best to structure this in a way that is easy to read but more than happy to answer questions if you have them.
I am in the market for a new telephoto zoom lens and I would like some help & opinions as part of my research.
The uses are:
- Motorsport (BSB, BTCC, MotoGP, DTM, WSB) Mostly at Brands Hatch, Thruxton and Silversone but also the occasional Snetterton trip.
- Wildlife - Zoo visits (big cats mainly), but also birds
- Avaition - Not something i have done before, but i would like to give it a go.
I currently have a canon 550D and have been using a pretty basic Tamron 70-300m f4.5 - f5.5 zoom lens (non IS). I have managed some decent results with the lens (see example below), but only with its sweet spot when the conditions are just right. The main limitations I have found is max focal length not quite enough, slow focusing speed with mediocre accuracy and image quality at the 300mm end (images are washed out and not as sharp)
My requirements are:
Must have:
- 400mm (im going for this because the 300mm doesnt quite reach in some of the spots i shoot from at the track)
- IS (including the panning technology that some lenses offer)
- Ability to fit extension tubes
- An improvement in image quality
- An improvement in focusing speed and accuracy
- Good quality even when extended out to 400mm
Desirable but not essential:
- Faster than f4.5 ( might be tricky in my price range, but willing to consider something if its close to budget)
My budget is around 1k - And i have seen two contenders in this bracket. The Sigma 80-400mm f/4.5-5.6 EX DG OS (Around £650) and the Canon EF 100-400mm f4.5-5.6L IS USM
What i would like to know from you!
- Do you have experience of either of these lenses?
- Is f4.5 fast enough
- Are there any others in this bracket worth considering?
- Is there anything faster for similar money?
- Thinking out of the box, would i be better off buying a shorter, faster lens and then adding extension tubes? (cant see this being cost effective but thought i would mention)
Thank you very much for taking the time to read.
A pic taken on my tamron:

Shakey by bdigital101, on Flickr
--------------------------------------------------------------------------------
Hi everyone, I am after some help & advice. I have tried my best to structure this in a way that is easy to read but more than happy to answer questions if you have them.
I am in the market for a new telephoto zoom lens and I would like some help & opinions as part of my research.
The uses are:
- Motorsport (BSB, BTCC, MotoGP, DTM, WSB) Mostly at Brands Hatch, Thruxton and Silversone but also the occasional Snetterton trip.
- Wildlife - Zoo visits (big cats mainly), but also birds
- Avaition - Not something i have done before, but i would like to give it a go.
I currently have a canon 550D and have been using a pretty basic Tamron 70-300m f4.5 - f5.5 zoom lens (non IS). I have managed some decent results with the lens (see example below), but only with its sweet spot when the conditions are just right. The main limitations I have found is max focal length not quite enough, slow focusing speed with mediocre accuracy and image quality at the 300mm end (images are washed out and not as sharp)
My requirements are:
Must have:
- 400mm (im going for this because the 300mm doesnt quite reach in some of the spots i shoot from at the track)
- IS (including the panning technology that some lenses offer)
- Ability to fit extension tubes
- An improvement in image quality
- An improvement in focusing speed and accuracy
- Good quality even when extended out to 400mm
Desirable but not essential:
- Faster than f4.5 ( might be tricky in my price range, but willing to consider something if its close to budget)
My budget is around 1k - And i have seen two contenders in this bracket. The Sigma 80-400mm f/4.5-5.6 EX DG OS (Around £650) and the Canon EF 100-400mm f4.5-5.6L IS USM
What i would like to know from you!
- Do you have experience of either of these lenses?
- Is f4.5 fast enough
- Are there any others in this bracket worth considering?
- Is there anything faster for similar money?
- Thinking out of the box, would i be better off buying a shorter, faster lens and then adding extension tubes? (cant see this being cost effective but thought i would mention)
Thank you very much for taking the time to read.
A pic taken on my tamron:

Shakey by bdigital101, on Flickr