I would suggest good UV filters first and foremost. They will help protect the glass if nothing else but also help with those pesky UV rays. If you can swing that and a good polarize filter and lens hoods to help reduce the risk of lens flare.
These are easily overlooked and yet awfully important items to any lens.
Also depending on what and how you plan on shooting, a good mono-pod might be as effective as a tripod.
Digital camera sensors already have a UV filter. UV filters were commonly used on film cameras.
Ordinary, untreated glass blocks most of UVB. The most energetic of the UV rays, UVC, are filtered out by the atmosphere.
Many think using a UV filter to 'protect' a lens is a waste of money. There have been reported instances where the shards from a shattered UV filter have gouged the objective lens when breaking, or have gouged the objective lens when being removed from the lens after being broken. Since the shards are usually forced inwards and held there by the filters outer ring.
At worst lower quality UV filters can cause a noticeable decrease in image quality. A top notch UV filter will not degrade image quality, though there are some limited situations a UV filter may help image quality somewhat:
- At altitudes above 5,000 feet
- In lighting situations where some materials are caused to flouresce by the light source.
UV filters attached to the front of a lens promote internal lens flare when the lens is pointed near or at a bright light source. A UV filter will also cause a decease in contrast from light scatter in the air gap between the filter and the objective glass.
Using the lens cap and a lens hood provides protection for the front of a lens with little downside (as long as you remember to remove the lens cap before shooting :blushing

and both are normally included with your lens. A lens hood will give a slight increase in contrast but can cause unwanted shadows when using flash on the camera.