I have an 18-200mm zoom lens on y Maxxum 7D that has "frozen" or locked up, i.e., I can't move the zoom from the 18mm position. I've switched it to my Sony Alpha with same results. It just appears to be frozen & unmoveable from the 18mm position. Any suggestions as to what is wrong & how to fix it?
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This is because the aperture varies with the focal length. Note the "f/3.5-5.6" in the lens designation? This means that the maximum aperture is f/3.5 at 18mm and f/5.6 at 55mm. If you set the aperture first and then zoom, the aperture could change by as much as one-and-a-third stops. To prevent this, zoom first and then meter the exposure.
You will only be able to use the f3.5 aperture setting when the lens is zoomed out to the 18mm setting. As you zoom in, the maximum aperture available will decrease until you reach the 55mm setting where the maximum aperture will be f5.6.
Check to see if you can obtain f3.5 with the lens zoomed fully out. If not, it sounds as if the aperture blades could be sticking, in which case it will need to be professionally repaired.
As I understand it, Sony bought Minolta, lock, stock, and barrel. Theoretically the lenses should fit and may work on manual, but I'm very sure they will not totally work on sony digital cameras. I wouldn't even try to fit them as the autofocus system on the camera may be damaged.
Hi, I have a Minolta 7D. I bought an M42 screw lens adapter, an almost flat plate, however the camera kept saying "no lens detected". Then somewher on the web I found a solution: On the menue screen I found "Shutter Lock" with the choice On or Off. By switching to off I can now use 42mm lenses. Though there is no AF and the metering works with setting the aperture manually. Good luck and maybe you find the Sony to be the same. Roy Smith
Try turning off the shutter lock.. In my Dynax 7D manual it tells you to turn off shutter lock when attaching to a telescope or microscope this is what this lens basicly is .The shutter lock is turned on and off in section three of the custon menu on my Dynax ,check your manual for your camera to find out where to turn on and off shutter lock, hope this helps
Usually mounts are unique to a camera manufacturer. There are exceptions. Sony has the Alpha; lenses for the Konica-Minolta are the same mount. Your AF (autofocus) lens will work on it. You might also consider picking up a Konica Minolta 5D or 7D.....they're no longer made and hence are cheaply had.
The MD and Rokkor lenses won't work on the Sony Alpha.
THIS IS A CHEAP LENS (<$50 VALUE) SO I WOULDN'T LET IT DRIVE YOUR DECISIONS!!