 BetterPhoto Member |
Upgrading a 75 - 300 mm f/4.0- 5.6 Lens I have had alot of problems with focusing using my Canon 75 - 300 lens. I used to have a EOS 500 but have just upgraded to an EOS 50E. I had previously taken my set up to shops but they could offer no advice. The upgrade was one option and the other is to also look at the zoom lens. Could anyone recommend another zoom lens preferably to 300mm or evn more, that doesnt struggle with long range photos, especially when tacking wildlife and reflective images on water?!
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Jon Close |
The 50E (Elan IIe) has improved af over the 500 (Rebel XS), faster and better in lower light. The performance of the lens on the 50E should be the same as on the 500. Are you having trouble with eye control focus (ECF), is the camera jumping from one focus sensor to another? I'm assuming you picked up the 50E used. Did you clear the ECF settings before calibrating to your eye? If you didn't clear the settings first then the camera simply combines your calibration with data from prior settings, which will result in unreliable function. To clear the ECF settings, turn the Command Dial to CAL, use the Main Dial to select the memory to be cleared (1, 2, or 3), then simultaneously press AEL (*) and the focus-select (ooo) thumb-buttons. Now you can calibrate the ECF for your own eye. Do it several times (without clearing) with different lenses, focal lengths, and different lighting situations, horizontally and vertically to improve its function. Otherwise, f/5.6 lenses are the limit for reliability with autofocus. In difficult conditions af performance is improved if you manually select the more sensitive center cross sensor instead of using ECF or automatic sensor selection.
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Jen Hernandez |
It is interesting that you are having problems with the lens. I have the exact same one and love it! I use it at 300mm all the time and without a tripod. I have never had a problem focusing, they are always crisp. Is there a way for you to exchange for the same lens? You might just have a faulty one.
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- Gregory LaGrange Contact Gregory LaGrange Gregory LaGrange's Gallery |
Autofocus is more a function of the camera body than the lens.
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Linda |
You mention reflective surfaces. Are you using a polarizing filter? They can interfere with the focusing on long lenses. Linda Frey
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