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Message: <blockquote data-quote="RandyDSok" data-source="post: 180542" data-attributes="member: 201">Well... yes there are options available. Lens shades are made for most camera lens models and work well if they are long enough to block any dew falling out of the sky as the evening progresses. These however do not help in the case of condensation where the lens is of a different temperature than the surrounding air and because of that, condensation forms directly on the lens itself. Letting the lens acclimate to the temp should help avoid condensation as well as using a heat source like the bands you mention. Wide angle lenses can have issues with lens shades in some cases if the shade interferes with the view through the lens. You can also make a simple lens shade using just about anything you can make a tube out of like a piece of cardboard that you simply wrap around the lens and hold it on with rubber bands in the simplest setup I can think of.If the heater bands you have are the right size, there is nothing stopping you from using them as well. These are likely more available through telescope retailers but since they are made to cover everything from eye pieces, pointer scopes up to large telescope tubes, so should also cover the sizes needed for a camera lens since these are basically the same as any telescope part also. Of course the heat bands do require an additional power source. Continuing with the DYI approach, make the carboard tube dew shield, get some of those chemically activated hand warmers and wrap them around the tube. While it is a bit of, shall I say southern engineering, they work fine.Another method that helps to cover both situations, dew and condensation... A simple fan pointed at the lens. Something like a computer fan works well and can be powered with the same 12v power source ( some fans are 5v but the 12v is more common ) you'd use for a commercial heater band. You would not want the fan attached to the camera or tripod so you can avoid any shaking from a slightly out of balance fan could induce in the shot. About the only thing we can do about mother nature... is just to try and avoid taking pics when the relative humidity and dew points affects if dew will happen or not. That is tougher when you live in the middle of a temperate ocean area than say where I live. I also try to avoid using heat. Where there is heat, you can have heat waves that can also affect your apparent focus. Higher winds also affect us, air moves in packets and higher winds move more packets in front of our cameras and telescopes. Higher winds aren't likely to be as much of an influence as the heat waves, but still must be considered.</blockquote>

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