Gear Talk > Lenses

17-40 F4L or Wide Angle Prime?

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BokChoiTV:
Well, the title says it all, that's my debate.
More than likely a prime under 40mm that has IS (like the 28mm F2 IS for example.)
ORRRR the 17-40 F4L.
Being used mainly for video (on tripods and dollys) and on a 5D MkIII.

Leejo:
I would have thought Primes.
Advantages
1) IS availability
2) f-stop advantage
3) the 17-40 is not parfocal as far as I recall - so you would need to refocus if zooming
4) normally lighter in weight
3) No tempation to zoom :-)

Versus - can't zoom...

Can't recall if the 17-40 is weather sealed - could be an advantage if required

K3nt:
It's an L-lens so weather sealing is present.

As pointed out... Better f-stop performance for primes but you have to zoom with your legs and not the lens.
I don't do video so can't say more than that.

CarlTN:
It seems like it would depend on the DOF you want, or if you are shooting in low light.  I haven't done much video with a DSLR.  Mainly I've used my Rokinon 85mm f/1.4, got some footage of my nephews shooting firecrackers after sunset.

A zoom is a lot more versatile...that's why you use a zoom, whether it's for stills or video.  Weather sealing is a plus.

bahula:
What focal length(s) are you going to be shooting at? Shooting stills with this combo at the wide end, there is substantial vignetting...easily corrected in post, but I have no idea if that would be an option for video.

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