Teleconverters and super zooms

sharpcroft

sharpcroft

Suspended / Banned
Messages
219
Name
Darren
Edit My Images
Yes
Anybody tried the above combination?

I tend to take a sigma 18-250 f3.5-6.3 with me on holiday as an all round lens.
I've been looking at buying either a 1.4x or 2.0x teleconverter for my sports photography (sigma 70-200 f2.8) and was wondering if it they could also be used on the superzoom?
I know sigma say no officially but was wondering if anybody had tried this with any success or not?

Cheers

Sharpcroft
 
TC's may not physically fit on some lenses, I've used both 1.4X and 2X on Sigma 150-500 and Sigma 120-300 with some success.
 
artyman said:
TC's may not physically fit on some lenses, I've used both 1.4X and 2X on Sigma 150-500 and Sigma 120-300 with some success.
Click to expand...

Thats what i thought, i know it will work fine with my 70-200 as sigma say so, im not sure if it doesnt fit the 18-250 or its just not recommended, hence the question before i splash out on both.
 
It might work but you wouldn't get any autofocus as far as I know!
 
The Sigma lens you are using the converter on has to have a recessed rear element as the TC has a protruding front element. Only the top end Sigma's have the capability to take one. Sigma have a list telling you if a lens works with their converters or not.
 
Last edited:
Mike is correct for Sigma TCs but a Kenko pro 300 1.4x *might* fit. These don't have the protruding front element so fit more lenses, and are pretty good quality as well. Whether the results would be any good with your 18-250mm is another thing though. I doubt if it'd be worth it.
 
The Kenko Pro-300 has certainly fit ever EF lens I've tried (EF-S no luck). Obviously you lose a stop by fitting it but it's been handy for that odd occasion when I wished I had a longer lens without carrying it :)
 
Try a Jessops 2x, Surprisingly good IQ, and fits most lenses where others fail....£80 brand new last time I looked...worth a punt ?!

Russ
 
Thanks for the help everyone, might be worth taking a walk down to Jessops, lens in hand

Sharpcroft
 
wouldn't even bother on your 18-250mm lens.

1.4x TC you lose an F-stop, 2x you lose 2 f-stops. Thats a significant high on whats already a very slow lens.

F-stops are f2.8, f4, f5.6, f8, f11, f16, f22

so 18-250mm f3.5-6.3 with 1.4 x TC would be a 25-350mm f5.6-f11
with a 2x TC it becomes a 36-500mm f8-16 lens

Wouldn't even waste your money. Especially a jessops version.
 
A Kenko teleconverter wont fit on a EF-S fit lens, I don't think there's any that do TBH. It would fit on the 70-200 as it says it's compatible but thats all.
 
You must log in or register to reply here.
Back
Top