18-200 mm nikon zoom autofocus has stopped working.
Initially only stopped on longer zooms, like 150-mm or more, and only intermittently, then progressively got worse until now not autofocusing at all. Did this about 2 years ago, but fixed itself when we put a new memory card in camera!?!?
Same solution doesn't work this time.
I have just managed to save some money for some new gear to help my prospect of finding photo jobs, and now it appears I may have to blow it all on another lens I already have....
Hope someone can help
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Re: 18-200 mm nikon zoom autofocus has stopped working.
Your motor may have gone bad. Try sending it to PhotoTech Repair Service in NYC. They are Nikon authorized, and can do the repair under warranty if you still have it. Also if you join they're facebook page, they will give you a 10% discount.
Here is the facebook page link, it has everything you need to send it in.
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Could be, because most camera's only can auto focus till f/1:5.6. And if 5.6 is reached at the focal length of 200 mm, the camera stops it from going to a part it can't be focused.
Perhaps you try the lens in manual focus, and manual zoom.
there must be a problem with the lens ring which are fitted inside, occasionally it gets worn out because of improper handling . alignments may have caused you the problem. but once again you need a professional help because you wont get any elements or parts easily except from the company.this lens could also may have jammed due to any reasons, may be a foreign body or so and because the af is OK you are still getting a sharp image up to actual 45 mm which you think to be 55mm. If i were you then I would have inverted the lens and tapped gently and then check it once again or best goto Nikon service centers .
A 35-80 mm lens is 2.3X zoom. Divide 80 by 35 and you'll get the result.
It is usually better to know what the focal length of a lens in "35 mm equivalent" is and judge by that, rather than relying on the "X" power of the lens. For instance, most point and shoot cameras start at about 35 mm and have either a 3X or 4X zoom. This would make it a 35-105 or a 35-140. I've seen some that start at 28 mm, though. A 3X starting at 28 mm is 28-84 and a 4X is 28-112. Neither one is a particularly strong telephoto lens and the 4X is just about the same as the 3X that starts out at 35 mm.
It's also important to realize that tradition dictates that lens focal lengths are usually expressed in terms of "35 mm equivalent," where "35 mm" refers to a 35 mm film camera. This is because of the relation between the sensor size and the actual focal length of the lens and the resultant angle of view of the lens.
I have one point & shoot that is actually a 5.8-24 mm zoom. This is a 4X zoom. The 35 mm equivalent is 28-116 mm. The sensor is 7.2x5.3 mm. (1/1.8") (And I wish I knew someone who could explain how the heck they came up with sensor size terminology!)
I have another point & shoot that is actually a 5.7-17.1 mm zoom. This is a 3X zoom. The 35 mm equivalent is 34-102 mm. "How could a shorter focal length give a longer 35 mm equivalent?" you might ask. It's because the sensor is only about 5x4 mm. (1/2.5")
I have a few Nikon DSLR's and - thankfully - they all have the same size sensor. They all have a "lens factor" of 1.5. This means that you just multiply the actual focal length of the lens to get the 35 mm equivalent and then you can make comparisons accurately from camera-to-camera. Most Canon's, for instance, have a lens factor of 1.6. On a Nikon DSLR, a 28 mm lens is the "35 mm equivalent" of a 42 mm lens. On most Canon DSLR's, the same 28 mm lens is the equivalent of a 45 mm lens.
These example are just to show you how freaking confusing it can all become if you try to make sense of the "X" power of a zoom lens.
Check the 35 mm equivalent specifications for the lens. This way, you will be leveling the field and comparing apples to apples. More or less.
Sigma makes their lenses with a variety of mounts for a variety of cameras. A lens with a Canon mount, for example, will not fit onto a Nikon camera. Assuming the lens has a Nikon mount, it is fully compatible with the D200.
If you mean the 150-500mm, you can see a review at http://www.popphoto.com/gear/2008/12/sigma-150-500mm-f5-63-dg-os-hsm-apo-af
In general, Sigma supertelephoto zooms have a pretty good reputation. However, only YOU can decide whether a particular lens is "good enough" for you.
That lens will work with the D3100, except for the autofocusing. In order to autofocus with the D3100, you need AF-S lenses, such as the AF-S VR Zoom-NIKKOR 70-300mm f/4.5-5.6G IF-ED or the
AF-S DX NIKKOR 55-300mm f/4.5-5.6G ED VR.
Yes. It will fit and work on every current Nikon digital camera. It will act longer, like a 125-450mm on the smaller sensor bodies (everything except the D700 and the D3 series). It will act like a 75-300mm on the D700 and the D3. It also won't autofocus on some of the low-end bodies, such as the D3000, which require the lens to have an internal focus motor.
Depends on the zoom length. If you check exposure at zoom 18 mm then zoom to (lets say) 100 for the final picture the flash will zoom concentrating the flash power as well; the flash gets stronger. This is all explained in the SB-800 manual. On a zoom such as the 18-200 the more you zoom the smaller the f/stop. You are better off with a zoom that maintains its f/stop through the entire zoom range. That way when you check exposure at 18 mm lets say f/2.8 then zoom in it will maintain the same f/stop. Myself I am not a big fan of zooms especially ones when zoomed change to a smaller f/stop.
Description: Sleek and stylish, the exciting new Nikon One-Touch Zoom 90QD offers real zoom power in a lightweight, easy-to-use design. The One-Touch Zoom 90QD has a sharp, clear, 2.5x zoom lens with a 38-90mm range and a macro mode for shots as close as 11 inches. The One-Touch Zoom 90QD features a built-in automatic flash with five versatile modes (auto flash, anytime flash, flash cancel, slow sync and red-eye reduction). The active infrared autofocus, infinity focus (for landscapes and faraway subjects), real-image zoom viewfinder and fully automatic exposure control all help to ensure clear and balanced photos.
1 x 3V Lithium Battery (CR-2)
Point and Shoot
Minimum Focus Distance
ISO Range - Automatic Setting
ISO 100 - 800
Red Eye Reduction
With Red Eye Reduction
With Zoom Lens
38 mm - 90 mm
User Manual can not be found up to now. Very soon will be available.