My camera doesnt allow me to take photos, the lens doesnt work.

I assume this happens while your camera is in the automatic mode. Because if the camera is in manual, you can't assume both lenses give the same light to the sensor.
But I should look if the contacts on the lens and in the camera, ale all clean and shiny. And not one of the contacts is allowed a dent. Not even a little dent. All contacts must be flexible. Then be sure the Aperture setting on the 40-150 must be correct. The camera manual does not say a thing about the settings on the lens, but I should look there too.

ALTERNATE WAY TO TRANSFER PHOTOS TO COMPUTER
If your photos are stored on the memory card, then removethe memory card from the camera and insert it into an USB memory card reader.Connect this USB memory card reader and memory card into the USB port of yourworking computer. Your computer will see this as an USB Mass Storage Device oran external storage device; you can then open the folder on the memory card andcopy the photos to your computer.Memory card reader is a handy device and is inexpensive. Youcan copy photos from other cameras and you can also download photos off yourmemory card to someone else's computer without the need of installing anyprograms.

Hi,

Here is a tip that I wrote about How toget a Digital Camera Lens to work again

Steps toRepair a Digital Camera Lens
heatman101

Lens errors are fairly common. Usually it's sand or grit interfering with the lens extension mechanism. Or the camera's been dropped with the lens extended. Or the camera has been powered on, but the lens had been blocked preventing its extension. Or the battery ran down with the lens extended ... Unfortunately, many cameras that fall prey to this can only be corrected by professional repair. But, here are some simple things that you can do to try to correct it. They only seem to work for less than 40% of the lens errors, but if the camera is out of warranty, they're worth a try.

Use a card reader to download your pics.

this is most likley one of two things. If you are using a rechargeble battery - it is not keeping a charge. When the camera detects low power it will usually shut itself down drawing in the lens for protection and shutting down. If the battery is gone passed it's time it will not take a proper charge. You will need to replace the battery.
Alternatively you may have a dodgy mechanism - some dirt or even internal component may be broken - in your zoom lens. If the lens cannot extend correctly the camera will automatically retract and power down so as not to cause further damage - for example you camera gets accidentally switched on whilst in the case, and the lens cannot come out.... bring it in for repair.

I know not a solution but hope it helps.
Regards
Thomas

annlane123,
Since you have been taking photos in one of the other modes, say shutter or aperture mode you may have changed the F-stop in the process, check to see that the ring is set back for auto mode by aligning the red numbers (ususally F-22) to the white dot on the lens, that way when the camera in auto needs more light the lens will open enough to allow it. Test it with the metering in the viewfinder you'll see it as you change to each number. Remember both the lens and camera are communicating with each other. Not allowing the shutter to release is kind of a safety.
randy320sgi

snoopytwo, jmv23 & guests,
Sounds like you have been taking photos in both auto & manual modes, make sure your f-stop is set at the range it needs to be to allow enough light for the camera to take the photo. Since the lens and the camera communicate, if the lens is closed down & not allowing enough light the camera will not take the photo - does that make sense - Look at the metering in auto mode and see what the camera says the conditions are for a specific lighting condition check to see if the lens has a aperture position for Auto, usually a dot on the lens ring to align with a setting in red or green (likely a F-22) depending on the make of lens, that has been moved to some place in the middle and not returned while trying other manual settings so the shutter won't release because the camera is told by the lens there is not enough light or slow enough shutter to take this picture.
randy320sgi

The following blog outlines some repair options for a lens error. They won't work for all cases, but they're worth a try if the camera's no longer under warranty:

http://camerarepair.blogspot.com/2007/12/fixing-lens-error-on-digital-camera.html

ecran vide lors de la prise de photos