extender ?

[aja]

i have a tamron 70-300 tele-macro ,and thinking of getting a
Canon EF 2x III Extender,,,,,,would this work with this lens ?

 

[crofter]

No,it won't fit to the lens,a Kenko one would fit but the results would be not very good and your camera will not autofocus.

 

[Mark twiglet]

Kenko is rubbish! I had one! Even with an 80-200 2.8 it was pointless!

 

[BacktotheFuji]

The Kenko DGX 300 1.4x tc is very good however Still won't work with the Tamron though unless you have a high end body. Even then the non-vc Tamron won't have the optical quality necessary for decent close ups I'm afraid.

 

[Mark twiglet]

If there was a cheap optically perfect way of making a 300mm zoom a 600mm zoom who would need to spend £5k plus for their lenses? We'd all buy a £99 kenko and get perfect results!

 

[Joeturner11]

Don't bother buying any converters for a Tamron 70-300mm, will be just a complete waste of money. Safe your money and buy a better lens if you want the reach

 

[aja]

i have the eos350d .what lens would you suggest for my favorite sport which is grass track racing ,

 

[Mark twiglet]

300mm 2.8 prime!

 

[aja]

thankyou mark will go have a look

 

[Stu Meech]

If you wanted reasonable cost to reach ratio, a 300mm 4.0 with a 1.4x TC would be a good option.

 

[Mark twiglet]

Is the 350d crop sensor?

 

[aja]

mark yes it is

 

[aja]

Canon EF 70-200mm f/4.0 L IS USM....this the one

 

[BacktotheFuji]

Canon EF 70-200mm f/4.0 L IS USM....this the one

Can't use the 2x TC with that one either. The 1.4x would work, but you'd get less than 300mm that way.

 

[ecoleman]

Can't use the 2x TC with that one either. The 1.4x would work, but you'd get less than 300mm that way.

Unless you factor in the 1.6 crop of the OPs camera. The 2x will work, but autofocus will not. It will also be a bit slow.

 

[BacktotheFuji]

Unless you factor in the 1.6 crop of the OPs camera. The 2x will work, but autofocus will not. It will also be a bit slow.

I think the crop factor is irrelevant given that the op already has 300mm at the long end.

 

[Mark twiglet]

Have you tried the 300mm lens grass tracking ? I've done grand prixs and truck racing and goodwood all with a 200mm 2.8 and never really said........ Wish I had a 300 or longer

 

[Box Brownie]

The 350D is quite old technology, it was my first dSLR and is great for many subjects but the the AI Servo focusing is very poor. AI servo is a good method shooting motor sports so you may struggle with that body whatever the lens. For what it is worth when I upgraded to the 40D my keeper rate improved immensely.

Best of luck with your choice(s).

 

[aja]

i have a choice of a 40d or a 50d now

 

[micloi]

Get the 50D and look for a Sigma 100-300mm f4. Fantastic lens and you can find it sometimes at bargain prices.

Also, depending on your budget, you could maybe look at a used 7D, some sell for around £350. Much better AF than the 50D.

Good luck!