Old Zooms on istD...any problems?
Posted 16/12/2005 - 14:14
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Hello Don,
Have you tried the lens on another AF camera - to see if you get focus confirmation?
I presume it works ok at other focusing distances and light levels?
Have you tried the lens on another AF camera - to see if you get focus confirmation?
I presume it works ok at other focusing distances and light levels?
Die my dear doctor, that's the last thing I shall do!
Posted 16/12/2005 - 16:34
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Hi Don,
I don't have any problems with my 70-210A on the D so perhaps you have got a fault with the lens. Do as Kimbo suggests and try it on another body.
Kim
I don't have any problems with my 70-210A on the D so perhaps you have got a fault with the lens. Do as Kimbo suggests and try it on another body.
Kim
Posted 16/12/2005 - 16:47
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Thanks, guys...I'm feeling kind of stupid. Some dirt under the rubber causing it not to roll over all the way. Everything works like a charm now.
Posted 17/12/2005 - 17:05
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Glad to hear it's working for you now!
Actually, I DID have a problem like this with the same lens! But this was back when I was using it on film bodies. I took it in to get it fixed and I watched the guy access some of the "tuning" screws. Good thing I did because eventually the problem came back. I was able to adjust it back to perfection.
It seems that the focusing/zoom collar slips out of alignment. This lens is also prone to having the zoom slide very slowly when inverted. I found a couple other screws tucked away inside that I tightened and now this baby holds it's zoom position. I use it with ext tubes for macro work so it's critical for this thing to stay in the proper position.
BUT, it's a super sharp lens... the f4 constant is perfect for my macro work. I've been looking for something to replace it in an auto focus setup... but there's only one constant aperture lens in the 70-210 ball park and thats the 80-200 f2.8. But it's just too big. Perhaps we'll see a DA 80-200 f4 soon! Keep your fingers crossed! I would buy it in a second!!!
Actually, I DID have a problem like this with the same lens! But this was back when I was using it on film bodies. I took it in to get it fixed and I watched the guy access some of the "tuning" screws. Good thing I did because eventually the problem came back. I was able to adjust it back to perfection.
It seems that the focusing/zoom collar slips out of alignment. This lens is also prone to having the zoom slide very slowly when inverted. I found a couple other screws tucked away inside that I tightened and now this baby holds it's zoom position. I use it with ext tubes for macro work so it's critical for this thing to stay in the proper position.
BUT, it's a super sharp lens... the f4 constant is perfect for my macro work. I've been looking for something to replace it in an auto focus setup... but there's only one constant aperture lens in the 70-210 ball park and thats the 80-200 f2.8. But it's just too big. Perhaps we'll see a DA 80-200 f4 soon! Keep your fingers crossed! I would buy it in a second!!!
Posted 17/12/2005 - 17:17
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Joshua: Thanks for the information. I have the lens back in alighnment at this point and have taken some great shots at infinity as of yesterday. I have a question for you. If I want to tighten some of these zoom screws, how would I go about it? Could you take me thru the steps, svp, and thank you.
Don Allison
Don Allison
Posted 17/12/2005 - 20:02
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First let me warn you that this requires resetting your infinity. Things will move during this process so if you feel confident go ahead and follow. The screws in you lens may already be as tight as they'll go, in which case you're out of luck with getting that zoom tighter.
1. Roll back the rubber grip on the zoom/focus ring to access the metal ring with 4 screws AND the slots with tape over them to access the screws with white plastic washers (to access these push the zoom out to 70mm)
2. Once these screws are removed the zoom/focus ring will slide back off in the direction of the lens mount.
3. Rotate focus ring until you see the access notch/hole and pull the zoom ring back to around 150mm to reveal SCREW #1. Tighten this baby down but be careful not to strip the screw. There's one more screw on the other side of the barrel you need to tighten but you must remove SCREW #2 to rotate the collar all the way around and access the notch/hole... so go ahead and do it... just put the screw back in once you've tightened the hidden screw.
4. Place the lens on the body to set the focus again. There are 2 separate sections that rotate - #1 is the front element housing which adjusts the focus and #2 is simply the marking ring and zoom control. (See Photo)
The rubber grip piece you took off earlier ties these two pieces together.
Look through the lens and rotate the #1 focus housing and to focus on a distant subject, preferably FAR away, whilst set on 210mm. DON'T TOUCH IT ONCE IT'S SET! This is your basic infinity setting.
5. Take the lens off the body and replace the zoom/focus grip by zooming out to 70mm and replacing the 2 screws with plastic washers. The screw on the metal ring with 4 screws (not tight, very loose) by starting at one end and working around.
This metal ring, when tightened down, secures the focus element to the marking/zoom element. By loosening the metal ring you can fine tune the focus at infinity. Once set, tighten up those 4 little screws and fold back the rubber.
6. Rock and Roll.
DISCLAIMER: I am not responsible for any incompetence on your part should the lens be rendered inoperable. Have a pleasant day!
1. Roll back the rubber grip on the zoom/focus ring to access the metal ring with 4 screws AND the slots with tape over them to access the screws with white plastic washers (to access these push the zoom out to 70mm)
2. Once these screws are removed the zoom/focus ring will slide back off in the direction of the lens mount.
3. Rotate focus ring until you see the access notch/hole and pull the zoom ring back to around 150mm to reveal SCREW #1. Tighten this baby down but be careful not to strip the screw. There's one more screw on the other side of the barrel you need to tighten but you must remove SCREW #2 to rotate the collar all the way around and access the notch/hole... so go ahead and do it... just put the screw back in once you've tightened the hidden screw.
4. Place the lens on the body to set the focus again. There are 2 separate sections that rotate - #1 is the front element housing which adjusts the focus and #2 is simply the marking ring and zoom control. (See Photo)
The rubber grip piece you took off earlier ties these two pieces together.
Look through the lens and rotate the #1 focus housing and to focus on a distant subject, preferably FAR away, whilst set on 210mm. DON'T TOUCH IT ONCE IT'S SET! This is your basic infinity setting.
5. Take the lens off the body and replace the zoom/focus grip by zooming out to 70mm and replacing the 2 screws with plastic washers. The screw on the metal ring with 4 screws (not tight, very loose) by starting at one end and working around.
This metal ring, when tightened down, secures the focus element to the marking/zoom element. By loosening the metal ring you can fine tune the focus at infinity. Once set, tighten up those 4 little screws and fold back the rubber.
6. Rock and Roll.
DISCLAIMER: I am not responsible for any incompetence on your part should the lens be rendered inoperable. Have a pleasant day!
Posted 17/12/2005 - 20:37
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Joshua: Much thanks for your time and effort. Don A.
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