I have the Sigma 150-500mm and am thinking getting either 2x or 1.4x extender for my Canon T3i. Does anyone have input as to which would be better.
1568079
I have a 2x, I would recommend you should see maximum aperture that you have with your lens. Adding a 2x will cut down the light going to the sensor and would be very difficult to shoot in the low light. I would recommend it only when you have a large aperture lens, with which it works really great.
1568080
I have owned both and the 1.4 although it is not as powerful will deliver sharper images and will not cause as much of a problem with auto focus. For the lens you are purchasing the TC for I am pretty certain that you will lose all ability to auto focus with the 2.0.
1183360
I would love to hear about a review of this sigma vs the canon flashes. as i have a sx20 and i need a large flash for large dim rooms.
122415
Correct --The 1.4x will lower it 1 f-stop, the 2x will lower it 2 f-stops. This means an f4 will be f5.6 with the 1.4x or f8 with the 2xWith that said, this tele extender can be used with fixed focal length lenses 135mm and longer (except the 135mm f/2.8 Softfocus lens), and the EF 70-200 f/2.8L, 70-200 f/2.8L IS, 70-200 f/4.0L, 70-200 f/4.0L IS USM, and 100-400 f/4.5-5.6L IS zoom lenses. I don't think it will work on a 24-105
1408918
Not sure with what Nikon lenses it would work since what I have is for a Pentax body and I can't use it with any of my AF or manual lenses except with my 1000mm & 2000mm mirror manual lenses due to the extenders element protrusion into the back of the lens cavity. The Sigma design is similar to those extenders of Canon. For my Nikon D7100 I use a Kenko DGX 2x extender which works perfectly well and it delivers good sharpness. The Sigma 1.4x for my Pentax does deliver good sharpness with my mirror lenses which I use to video distant birds.
551141
I believe there is a list of which Canon lenses work with this extender. I have used it on my 200mm F2.8 L and 400mm just fine. I can hand hold it but on the 400 which is 11 lbs. is just a little much and any movement and it is blurred of course. I would suggest checking the list if you haven't. You can most likely find the list at Canons web site.
1823795
I suspect you have extension tubes mixed up with a telextender... The extension tube set is used for closeup work... whereas the extender will multiply the focal length by 1.4 or 1.7 or 2.0 The downside of the extender is usually quality of the image and in some cases loss of automatic focus ability... Glad to answer more if you can explain what you are trying to accomplish...
650647
I also have a Canon 100mm-400mm L f4.5-5.6 IS. So far the Tamron outperforms my Canon 400 in nearly every respect. As long as there is good light the Tamron is a faster focus lens and with a lot more pull it is more versatile. I have not been able to use the Canon lens with an expander, as it is incapable of autofocus with a 1.4x. Better check your sources as far as compatability with an expander. With the cost being much less than the Canon...I have to give the nod to the Tamron...better value, about the same weight, more pull and quicker focus. I had used the Canon for several years before getting this Tamron lens...lots of shortcomings with the older technology of the Canon. I hope this helps in your decision making.
816326
It will fit but in all honesty this is not worth your time or money for an extender. it is cheap and does not have functionable use. Save your money get an L series Canon lens and buy the Canon 1.4 extender you will produce quality pictures. when it comes to photography don't settle cheap. i have learned the hard way with buying cheap and instantly regretting it.
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Taking a nature trip in a couple months to national park. I have a Canon 50D. Thinking of getting a Canon EF 100-400mm f4.5-5.6L IS USM Telephoto Zoom Lens and Canon EF 1.4X II Extender. With these lenses work with the 50D? What about AF and IS?
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I have owned both and they are great lenses with fantastic results. The Tokina will increase in length as you change focus, whereas the Sigma moves the glass when focusing within the body of the lens. If you plan to shoot insects or really up close, you may prefer to go with the Sigma (as I did). Another reason to go with the Sigma over the Tokina is if you plan to use a lens-mounted ring flash or similar. Although you can use these on the Tokina, I was concerned about extra stress on the plastic part of the lens that extends. Otherwise, you can't go wrong either way. I suggest visiting your local photography store that has these in stock to test out, or renting the lenses to try out and see which one you like before purchasing from Amazon. Good luck!
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Sigmas are known for focusing issues - play it safe and go Canon for sure. Plus if you graduate to full frame you'll still be able to use it.
2130770
Concur with Rich Maher's comments. However when I use it with my Tamron 18-270 zoom I find that I need to use manual focus as it gets a little "confused" with the extender.
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i hear alot of good things about the sigma 17-35 1.8 all though it would depend on what sort of photography you do!i like to keep in the family,so thats why i went with canon 85 1.8 witch is a vary good lens,also its a prime lens and would work well on your t4i and most other canon cameras.
1960709
No, the 1.4 and/or 2.0 extenders are not compatible with the Canon EFS 55-250mm lens.
257468
if you can afford the 2.8, get it one of the best lenses Canon makes--1.4 extender will get as good results as the 400 4.5 and you will not miss the 1-300 f4 zoom flexibility for birds.
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I used the 1.4X teleconverter with the Sigma 300 f. 2.8, for pentax. So I do not have experience on its use with the 18-250 Sigma lens. Any way I'm not very happy of it, there is huge decay in quality and in focus. I would not suggest to any friend of mine to buy it.
1109120
Daniel, It's been a while since your post, so you may not need to this info anymore, but I'll pass it on anyway. I would suggest reading the link below for all kinds of info relating to Extenders and Extension Tubes. The answer to your question, which is also on the following link, states: "Most extenders are designed to retain the focusing range of the original lens". http://www.bobatkins.com/photography/eosfaq/closeup2.htm