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08/30/2004 11:30:50 PM · #1 |
I have a Canon EF 100-300mm f/4.5-5.6 lens.
I want to do more surfing photography, and can't get 'close' enough.
The lens has already been converted to 160-480mm by the crop factor, so that is a bit closer, but I was wondering about tele-converters.
EDIT: OK, so it's 180mm closer, but I can't just go and tell the surfers to come closer cause i want a better shot...)
Has anyone ever used a 1.4x Tele-converter on a telephoto-zoom lens before? Will the converter knock out autofocus? How many stops will the aperture change?
Should I not bother and save up for the 400mm f/5.6L ??
Message edited by author 2004-08-30 23:31:44. |
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08/30/2004 11:37:31 PM · #2 |
A 1.4x converter will reduce aperture by 1 stop, so your 100-300 f/4.5-5.6 will become a 140-420 f/6.3-8.0. That'll certainly throw out your autofocus.
It'll be better to get a longer lens for the job, besides the 400 f/5.6L there are other choices-
- Canon 100-400 f/4.5-5.6L
- Sigma 50-500 f/4-5.6 EX (a.k.a. The Bigma)
- Canon 300 f/4L + 1.4x converter?
Hope that helps,
:)atwl
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08/30/2004 11:41:22 PM · #3 |
So there must be only a select few lenses that retain AF through the tele-converters...
hmmm..... save up for the 400mm f/2.8?? |
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08/30/2004 11:51:52 PM · #4 |
Originally posted by wimbello:
So there must be only a select few lenses that retain AF through the tele-converters...
hmmm..... save up for the 400mm f/2.8?? |
Autofocus is not a function of the lens, it's a function of the Camera body. For example the 1D Mark II can autofocus with slow lenses having a maximum aperture of f/8. So if you use a Canon 300mm f/4 with a 2x Teleconverter you'll have a 600mm f/8 lens and the Mark II will still be able to autofocus with that lens.
GOOD telephotos and super telephotos (400mm and higher) are expensive, you can't escape that fact. The 400mm f/5.6 is relatively cheap but slow, the 300mm f/4L IS is not cheap but not excessively expensive either, coupled with the 1.4x teleconverter you get a 420mm f/5.6 lens with IS, good compromise compared to the bigger faster lenses which are 5-6x more expensive.
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08/31/2004 12:04:43 AM · #5 |
On the August issue of 'Photo' (french photo mag), there's an article on Jérôme Houyvet, who's considered as one of the top in the Surfing photo industry. He says he mostly uses a 600mm 2.8 with a 1.4x or a 2x magnifier to properly capture the surfers. He usually has to go in the water with a waterproof case custom built (for the lens) to be able to get the best. Naturally, that's for Maui's 50 foot tall killerwaves...
check out his site, its amazing.
www.windsurfgallery.com (english and french)
Message edited by author 2004-08-31 00:08:23.
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