Question about Minolta Maxxum 400si 35mm SLR Camera

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Ive recently purchased an OPTEKA 650 TO 1300 MANUAL FOCUS ZOOM LENS my camera is obviously in af mode and every time i try to CLICK a picture it wont click. what do i do?

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  • jstaubsjr May 26, 2010

    how do i change my minolta maxxum 400si from auto focus to manual focus for my new OPTEKA 650 -1300MM ZOOM LENS and then back to auto focus for my other lens ?i am new to this .is there anything else i should know?

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Dear Jstaubsr,
your camera as well as lens should be capable of auto focus.... in other words auto focussing is also dependent on your lens.
Since your lens is manual focus. It will not work in auto focus mode.

Posted on May 26, 2010

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You have mentioned in the problem that you are using a manual focus zoom lens. It means that the camera cannot utilize its motor to auto focus the lens. You should put your cam in manual focus mode and take a picture.

Posted on May 26, 2010

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You did not provide enough information to determine what your problem is. For example, were the pictures all light or all dark. Knowing this lens, I will assume that they were all dark. So...

1) This is a very, very slow manual-focus lens. It will not auto focus. It must be manually focused very precisely because it has virtually no depth of field.
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You should have an image but it may be too light or too dark.

If its too light you'll need to increase the shutter speed or stop down the aperture to, say, f11...or both. Make the adjustment and shoot another picture. Remember that if you increase the aperture, you increase your depth of field, making focus less critical. If you increase the shutter speed you make camera or subject movement less critical.

If it's too dark, you can only increase the shutter speed because you can't open the lens any wider than f8. Make the adjustment and shoot the picture.

Keep doing this until the pictures are the way you want them.

This is a decent lens for the price and worth the little money they cost if you can't afford $10,000 plus for a high quality telephoto lens of this size. I would forget about the 2X doubler because as others have said, it further reduces the speed of an already very slow lens with such a high rate of magnification that a knat landing on the lens could cause the picture to blur from movement.

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