Lens to camara contact at full zoom

Err 01

Description: The communication between the camera and lens is faulty.
Resolution: Very gently clean the electrical contacts (highlighted in red) on the camera and the lens using a clean and dry cloth.

I get the same issue with that lens but on my new Canon 60D

Simply clean your camera lens contacts

Here is a tutorial , how to clean your camera lens contacts

http://www.youtube.com/watch?v=wUt-K6w7lc0

Good luck and regards

This is a digital camera and I suspect it's not the mirror that's showing dirt it's the sensor. If you are seeing small bits of dirt on your pictures then it's dirt on the sensor. I would suggest having it cleaned at a camera store or repair facility if you are not comfortable with doing it yourself. Cleaned improperly can damage the sensor and renter the camera pretty well useless. The dirt inside the Tamron lens I would also suggest cleaning and if you are getting an error message you may as well send the camera in for a complete cleaning. There are kits on the marked to clean the sensors but again if you are not confident that you can do this then sent it to people that can and do it on a regular bases.

Check for a firmware upgrade for the camera and or the lens.

If the camera has recently been dropped you may have lens damage that's preventing it from powering up. If it hasn't been dropped your problem may be due to weak/worn out batteries or corrosion on the battery contacts inside the camera - which can prevent the full power of the batteries from flowing into the camera. Try this free fix before you do anything else: remove the batteries and wipe the camera contacts firmly with a dry cloth (heavy corrosion may require cleaning with a wire brush, steel wool, or sandpaper). Remove any residue that may have fallen into the battery compartment during cleaning, then clean both ends of the batteries, place them back in the camera and give them a full charge. This cleaning clears the problem about 80% of the time. If it doesn't work for you, it may be time to replace the batteries, or the camera may have a problem that requires professional repair.

If you've recently dropped the camera you may have lens damage that's preventing the camera from working properly. If you haven't dropped it, your problem may be due to weak/worn out batteries or corrosion on the battery contacts inside the camera which can prevent the full power of the batteries from flowing into the camera. Try this free fix before you do anything else: remove the batteries and wipe the camera contacts firmly with a dry cloth (heavy corrosion may require cleaning with a wire brush, steel wool, or sandpaper). Remove any residue that may have fallen into the battery compartment during cleaning, then wipe both ends of the batteries and place them back in the camera. This cleaning clears the problem about 90% of the time. If it doesn't work for you, your batteries may need to be replaced, or the camera may have a problem that requires professional repair.

The lens may have malfunctioned. It could be jammed, one of the plastic moving parts is broken, or the motor has malfunctioned.

You can try to open the r742 camera and swap out the lens with working set from another non-functioning r742 camera.

Its an error code and shows problem of Lens mechanism.
Lens focus / zoom motor is stuck that's why camera gives out of focus image.
You need to replace Lens Assembly and it would cost you more then camera worth.

well **** that doesnt sound complicated or anything.