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Old Jul 21, 2010, 12:08 PM   #1
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I have 2 question , Haven't shot my AE1 for about 6 years and finally got a T1i Is there a adapter I cam get to use my old lenes? and which zoom lens would be good for me to shoot full frame pics of my dogs at about 100- 150 feet away. cost is not a object as I will save for months if I have to to get what I need.

Thanks in Advance
Dave
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Old Jul 21, 2010, 12:25 PM   #2
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Dave - at 150 feet away you'd need a 500mm lens to fill the frame with a dog. The Bigma (sigma 50-500) is the most affordable 500mm option with quality. The canon 100-400L is lighter and with IS makes it more flexible and easier to use - but it costs a good bit more.
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Old Jul 21, 2010, 12:26 PM   #3
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t1i is a crop isnt it?
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Old Jul 21, 2010, 12:27 PM   #4
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yes, but I'm guessing he meant he wanted the image to fill the frame
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Old Jul 21, 2010, 1:57 PM   #5
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Quote:
...shoot full frame pics of my dogs at about 100- 150 feet away...
Chihuahuas or Great Danes? ;-)

With a 500mm lens on a Canon model with an APS-C size sensor from 150 feet away, you'd capture an area roughly 80 inches wide on the longest dimension of the image.

You'll find a calculator on this page that may come in handy:

http://www.cambridgeincolour.com/tut...era-lenses.htm

As for using your older lenses, you can find adapters that let you use Canon FD mount lenses on a Canon EOS body.

But, these adapters require optics to allow focus to infinity with FD mount lenses, which can degrade optical quality.

Basically, they act as a Teleconverter (usually 1.2x to 1.3x magnification), with close to 1 stop of light loss if you want focus to infinity. It will also be difficult to judge focus accuracy in your viewfinder unless you install a split prism type focus screen (which can impact metering accuracy), since you don't have that feature with the focus screen used in T1i.

Start with this post in a recent thread and you'll see some discussion about some of the options.

http://forums.steves-digicams.com/wh...ml#post1116110
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Old Jul 21, 2010, 8:35 PM   #6
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Thanks for all the fast replys. JimC I guess I should have been a little more specific about the size of my dogs, both are German Shepards around 100#. I was testing the 75-300 lens on my AE1 and seems a little bit short for what I am looking for so I guess I will start saving my penny's while I practice with the kit lens, also thanks for the great links.
JohnG thanks for the lens suggestions I will check them both out.

Thanks Again
Dave
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Old Jul 22, 2010, 12:45 AM   #7
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well the 75-300 on your ti1 would essentially be a 120-480
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Old Jul 22, 2010, 8:05 AM   #8
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Quote:
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well the 75-300 on your ti1 would essentially be a 120-480
Which is still way too short to fill the frame with a german shepherd at 150 feet. The 75-300 is also a very poor optical quality lens at 300mm. So I think the OP is going to be a bit dissatisfied with the results.
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Old Jul 22, 2010, 12:45 PM   #9
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After looking at prices on the above mentioned lenses I think I will have to look at a smaller lens and some new shoes to get a little closer for the time being
Thanks for all the information
Dave
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Old Jul 22, 2010, 12:49 PM   #10
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Originally Posted by doppliger View Post
After looking at prices on the above mentioned lenses I think I will have to look at a smaller lens and some new shoes to get a little closer for the time being
Thanks for all the information
Dave
A very cost effective strategy! If you can get much closer and can afford it, the 70-200 f4 (non IS) is a stunning performer. Extremely sharp, very fast focusing and professional build.
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