I have a D-50 with two zoom lenses. They used to auto focus fine but now if I want a wide shot, I have to zoom all the way in, then grab focus, hold on to the "focus lock" button, zoom out and then shoot it. If not, all is soft focus. Help?

Hi I am SAGHA camera repairer from mumbai,I think your sigma 18-125 dc lens is having electronically operated aperture unit in which one Film PCB runs from mount contacts to aperture unit.Due to multifolds of that film inside the barrel the film gets cracked at one fold location So either you have to get that film changed or the whole aperture unit replaced from an expert.give me feedback for this tip Vote me if you found it useful,ALL THE BEST.

Seems as if you're snapping the shutter before the lens has focused. Have you tried manual focus or single-server auto focus?

Mine occasionally does this as well, but only when trying to focus on the left side of my viewfinder. I found there is a piece of dust on the sensor in just the right quadrant that prevents it from focusing. Try setting your focus settings so that you can press the left or right buttons to select the focusing quadrant (left, middle, or right). If that fails, you can always manually focus.

Canon currently makes super Telephoto lenses from 300mm to 800mm and a number of zoom Telephoto lenses from 28-300 to 100-400. You can also special order a 1200mm lens from Canon at a cost of $99k! (There are only about 20 such lenses made so far.)

You can also get a 1.4 or 2x teleconverter to further increase the power of a telephoto lens. However, the cameras are unable to auto-focus when the minimum f-stop exceeds f/8, which can happen when you use one (or both) of the teleconverters on these longer lenses, so you have to manually focus the lens.

You can also get telephoto lenses from other manufacturers such as Tamron and Sigma that are built to work with Canon cameras. However, the Canon lenses are generally regarded as the best quality.

Change from auto focus to manual focus or focus using only one focal square and change the setting to One Shot. You may need to shoot in Manual (M) mode though. Any of the "auto" modes will not let you.

The helicoid or the barrel thread in the lens may be jammed. The lens will have to be serviced. You should take it back for warranty service.

As for myself, I aways buy origional manufacture lenses and accessorites for my cameras.


Jerry G.

Talked to canon support, they suggested to send lense in for review/repair. They said it could be the motor, I think it was a gear problem based on the noises and jerkiness of the focusing action while in manual focus (manual focus gave out as well). Cost TBD - "would definately be more than $50. I shopped around and elected to buy a new lense rather than try to hassle with the repair, shipping, insurance, and the wait, etc. Besides, I have a deadline that I need the lense for, so repair at Canon really became a non-option. I think the cost would've been pretty much the same in the end as the new lense, since this wasn't one of the costlier of lenses to begin with.

wide angle lens aka fish-eye lens, means only the centre of your photo is clearly focused - especially in long distance scenery shots.

The D-490 Zoom shares the following features with the D-460 Zoom: •Olympus 5.4mm to 16.2mm (equiv. to 35mm to 105mm on a 35mm camera) lens: all-glass, 8 element, 6 groups, 2 aspherical lenses •Automatic TTL focus system •Macro mode allows the camera to auto focus as close as 8 inches •Automatic aperture selection: f2.8 to f8.0 wide, f4.4 to f12.6 tele •3x image magnification inspection mode •Panorama mode: Allows multiple pictures to be "stitched" together to create wide views •NTSC video output to TV •12-second self-timer •8MB SmartMedia card included •Built-in, pop-up intelligent flash: Auto low & backlight, red-eye reducing, off, fill-in, slow-sync •Automatic white balance control or 4 manual settings (daylight, cloudy, tungsten light, fluorescent light) •Automatic ISO sensitivity or manual selectable ISO settings •Uses 4 AA size batteries. AC Adapter is available as an optional accessory In addition, the D-490 Zoom has the following functions and features: •2.1 megapixel resolution (1600 x 1200) •Sequence mode - up to 5 shots in HQ and up to 45 shots in SQ mode (1.3fps) •Motion picture mode - up to 60 seconds of QuickTime movie (.mov) format (w/o audio)

The D-490 Zoom shares the following features with the D-460 Zoom: •Olympus 5.4mm to 16.2mm (equiv. to 35mm to 105mm on a 35mm camera) lens: all-glass, 8 element, 6 groups, 2 aspherical lenses •Automatic TTL focus system •Macro mode allows the camera to auto focus as close as 8 inches •Automatic aperture selection: f2.8 to f8.0 wide, f4.4 to f12.6 tele •3x image magnification inspection mode •Panorama mode: Allows multiple pictures to be "stitched" together to create wide views •NTSC video output to TV •12-second self-timer •8MB SmartMedia card included •Built-in, pop-up intelligent flash: Auto low & backlight, red-eye reducing, off, fill-in, slow-sync •Automatic white balance control or 4 manual settings (daylight, cloudy, tungsten light, fluorescent light) •Automatic ISO sensitivity or manual selectable ISO settings •Uses 4 AA size batteries. AC Adapter is available as an optional accessory In addition, the D-490 Zoom has the following functions and features: •2.1 megapixel resolution (1600 x 1200) •Sequence mode - up to 5 shots in HQ and up to 45 shots in SQ mode (1.3fps) •Motion picture mode - up to 60 seconds of QuickTime movie (.mov) format (w/o audio)