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Old Apr 2, 2010, 2:26 PM   #21
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Originally Posted by Widowmaker View Post
Why must we assume that everyone wants to know exactly what is happening? Maybe someone just wants to know that if they stick this lens on this camera will they get the same view as if they used the same lens on a another camera.

This is why I said.. "Without getting technical" and "Basically" . You seemed to quote and respond to me directly with..."Nope, using that lens you have a 17-55, nothing changes that." must have been for the sake of argument or to open the opportunity to get technical because my statement never suggested the lens magically transforms into a 27-88mm.
Not at all, but if someone is asking such a question they need to know something and generally they would have some previous understanding otherwise these numbers mean nothing.

If they have no understanding then as far as they are concerned they just need to know that it is 17-55mm, if they have an awareness of 35mm then this information is helpful but also they are likely to be able to understand the extra explanation that will be very helpful.

Yes, you can be simple, but being simple can cause more problems in the future, so a little additional, still simple and concise detail will make life much easier.
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Old Apr 2, 2010, 11:26 PM   #22
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Originally Posted by Widowmaker View Post
Without getting technical.... on that body, using that lens, you basically have a 27-88 mm lens. The fact that its an EF-S does not change that.
Thanks. I misunderstood. Thought the 'S' in EF-S being closer to the sensor would amount to more than just smaller glass (lighter lens).
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Old Apr 12, 2010, 7:50 PM   #23
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I am new to all this. Will receive my first DSLR (Canon T2i) camera Thursday. Since I stopped using my Canon AE-1 Program several years ago, all my cameras have been point and shoot. I am also getting a 70-300 IS USM lens (that's the best I could afford now). I would love to have a 400mm lens, but don't know if that will ever be possible/practical for me. So I was looking at Canon and Tamron 1.4x and 2x Extenders today. I realized the T2i is 1.6, so I thought, I don't need any more power. The 70-300 will be like having a 160-480. But what I read here seems to say that no, the image I see will not appear to be any closer, or more detailed, it will just fill the frame more. Is that an accurate statement? It seems that patience was wearing thin here, so I hope I don't start that again.
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Old Apr 12, 2010, 8:26 PM   #24
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The image in the viewfinder is larger in a 'Full Frame' dSLR than in an APS-C dSLR, and some are larger than others. But the smaller image sensor in an APS-C dSLR gives the same lens a narrower angle of view, resulting in a 35mm equivalent focal length of 112-480mm.
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Old Apr 12, 2010, 8:32 PM   #25
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...I would love to have a 400mm lens.... The 70-300 will be like having a 160-480...
it did appear that patience was a commodity in short supply but i really doubt it. probably just written vs spoken.

since you're coming at this from a 35mm background, and you expressed a desire for a 400mm lens, I'll presume you mean like a 400 mm lens used to be. So, yes, your 70-300 will be like having a 160-480 in some ways. Field of View for instance. There are other differences that folks more knowledgeable than me might help out on. Like distance compression. I don't know what else.

But without appearing to talk down to you, at the entry level of knowledge and skills, the 1.6 conversion is a good enough approximation. when you learn more about your particular needs, perhaps it won't be. that'll come when it comes. no rush.
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Old Apr 13, 2010, 5:22 AM   #26
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Originally Posted by rmortonjr View Post
I am new to all this. Will receive my first DSLR (Canon T2i) camera Thursday. Since I stopped using my Canon AE-1 Program several years ago, all my cameras have been point and shoot. I am also getting a 70-300 IS USM lens (that's the best I could afford now). I would love to have a 400mm lens, but don't know if that will ever be possible/practical for me. So I was looking at Canon and Tamron 1.4x and 2x Extenders today. I realized the T2i is 1.6, so I thought, I don't need any more power. The 70-300 will be like having a 160-480. But what I read here seems to say that no, the image I see will not appear to be any closer, or more detailed, it will just fill the frame more. Is that an accurate statement? It seems that patience was wearing thin here, so I hope I don't start that again.
I would say patience was wearing thin just that not everone of us agrees on all aspects of how to share information. The field of view you mention is correct so the lens does appear to be longer than if you had it on a 35mm camera, but the depth of field for example doesn't vary the same as it would do if it were a 160-480 lens on a 35mm camera. Also you don't get quite the same 'reach' as a longer lens..... what I mean here is this. Each lens has a maximum range at which you can expect it to perform best, when you try shooting subjects further away the focus accuracy is not as good and also you are going to be looking at softer results without stopping down. The longer the lens the further this range. So you still have a 70-300mm lens no matter what body it is on so you have the same range limitations for best quality of about 40 yards, if it were a 480 lens then you would be looking at about 70 yards or so.

So the basics are, looking at the results you will have a similar view to a longer lens but it doesn't totally perform like a longer lens.

As for adding a tele converter, I would really suggest against it as you won't have AF and although this is a strong performing lens you get degradation in quality when you put a TC on as well as losing a stop of light with the 1.4 and 2 stops with the 2x making it pretty dark. If you were using live view and shooting stationary subjects then you could get away with the 1.4 but honestly I wouldn't bother.
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Old Apr 14, 2010, 12:47 PM   #27
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Thank You all for helping. I like that "none of us has mastered this game". Just studying the cameras user manual online I'm feeling a bit (okay a lot) overwhelmed.
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Old Apr 14, 2010, 12:55 PM   #28
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Thank You all for helping. I like that "none of us has mastered this game". Just studying the cameras user manual online I'm feeling a bit (okay a lot) overwhelmed.
Don't panic and don't try to take it all in at once, we are all still learning, I spend a lot of time reading up on different techniques and looking at the work of others to try to get new things to stick in my head. That's the fun of photography, if you want to learn you can and the guys and girls at Steve's are here to help!!
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