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Old May 27, 2009, 4:08 PM   #1
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Default Teleconverter and EF-S lens

Hi Guys,
I have a Canon XS with the 18-55 IS lens kit and a 55-250 IS lens. I like to shoot close ups of animals and the 55-250 doesn't seem to get close enough. I take it the 55-300 IS lens wont get me that much closer and its around $650. Does anyone know if I can add a teleconverter to an EF-S lens?
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Old May 27, 2009, 5:53 PM   #2
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Yes you can add TCs to EF-S lenses but I wouldn't suggest this for lenses that are not f4 or brighter. Firstly you will lose AF in that situation as the XS will only focus with a f5.6 lens or brighter so if you add a 1.4x TC to a f5.6 lens it will be f8 and thus no AF. Another problem is that adding a TC will reduce quality, again I don't believe that either of these lenses are overly sharp at the long end so reducing that will not be helpful.

What sort of animals are you talking about shooting? Have you got some examples of how you have got on so far?
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Old May 27, 2009, 6:24 PM   #3
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Hi Mark1616,
Thanks for the response. I went from an advanced point and shoot camera with 12x optical zoom and went to a DSLR. The one thing I really miss is the zoom that I got with the Canon S5is. The animals that I like shooting are birds and some animals at the Zoo. Here is a picture of an Eagle I got at the zoo, but I would really like to get a really close up face shot. the zoom lenses that go to 400-500mm cost thousands, so I am looking at other ways to get close up shots.
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Old May 27, 2009, 6:35 PM   #4
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It's very true and a problem with dSLRs, getting that focal length is not cheap. I have a 300mm f2.8 lens which works pretty well with a 2x TC but still not great and we are talking an expensive lens with the f2.8 so adding a TC to a lower level zoom lens is not great. You can go for it but be aware that you are going to be quite soft and manual focus (hard on a dSLR without a focus screen).

Just don't have too high an expectation when using a TC on anything but high quality glass.

The options that might work at not crazy prices (in the order of my believed quality and fit for your needs)

Sigma 100-300mm f4 this will take a 1.4x TC very well, it is an amazingly sharp lens and still great with a 1.4x TC
Canon 400mm f5.6 stunning lens but fixed focal length so you don't have so much flexibility.
Sigma 150-500mm
Sigma 50-500mm

The latter two I'm not so sure about but believe that is the correct order. I would have a look at what other wildlife shooters are working with before spending any cash (if you decide to go that route) as it is not only focal length but AF performance and sharpness.
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Old May 27, 2009, 6:35 PM   #5
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Forgot to say, cool shot
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Old May 27, 2009, 6:55 PM   #6
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Mark 1616,
Thanks very much for the help. I think I will probably go the Sigma 100-300mm f4 route!

Thanks Again
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Old May 27, 2009, 6:59 PM   #7
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If you can afford it then it is fast focusing and almost prime lens sharp. With a 1.4x TC you get 420mm so that is a 35mm equiv of 672mm which is pretty good. Be aware that this is not a light lens so monopod is going to be very helpful if using for a long time.

The problem is we always want more range, I keep getting tempted by a few options be it the Canon 400mm f2.8, Sigma 300-800mm f5.6 and the Canon 600mm f4 but manage to stop myself although been pretty close a few times.
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Old May 27, 2009, 7:05 PM   #8
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Someday I will be able to afford it, but for now it is just a dream!
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Old May 27, 2009, 7:07 PM   #9
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By the way, have you ever looked at these?
The Bower 500mm f/6.3 Manual Focus Lens is a catadioptric mirror T-mount lens.
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Old May 27, 2009, 7:10 PM   #10
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Yes, probably when working to a budget I think most of us will have considered the long focal length low price of mirror lenses. I have seen a few good shots from some mirror lenses but unfortunately not many and most people who buy them soon seem to go for something else so the money has been wasted. If you are happy to MF and to only ever have f6.3 then you might get somewhere but I would always want to try one out in anger first before handing over my cash.

If you are seriously considering one I would start a new thread with that as a title so others will look at it and reply. With that question hidden down here a lot of people will not spot it.
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