Jump to content


Dew..... on canon 50mm lens

Recommended Posts

thought I was going nicely last night doing a widefield milky way shot but instead of a couple of hours of frames I ended up getting 45 minutes because my camera lens (Canon 50mm) dewed up.

any suggestions on how to stop this - rig up my own dew shield (or are they commercial available), are there dew heaters for camera lenses... wiping off the lens between shots (having set a longer pause between shots..)????

Tia for any imput.

Link to comment
Share on other sites

Wiping is not to be reccomended ... a low power 12V "hair dryer", for emergencies, should be part of every imager's kit.

You will probably find that the dew heater straps sold for finders or 2" eyepieces will fit your camera lens, wrap it round the barrel below the lens shade unless the lens shade is metal.

Link to comment
Share on other sites

what's the right name for the 12v hair dryer

They're sold under various brands - e.g. Orion Dew Zapper Gun: Orion Dew Zapper Gun | Telescope Accessories | Rother Valley Optics

As they take a condiserable current (typically 12A @ 12V) running from disposable batteries is not sane. They're happy to run from the sort of power tank you use for running mounts, dew heater straps etc.

Link to comment
Share on other sites

use an eyepiece dew band. I dont know if blinky still makes them but I got a couple to put round my camera lenses from him a while back and they are spot on. you could also use a bit of camping mat with a couple of elastic bands as a small temporary dew shield.

Link to comment
Share on other sites

I've bought the Kendrick Firefly controller and heating straps for my lens and they work well off a small 12v 7Ah battery. They also make a Firelite system specifically for DSLRs but I found the power connector was too fragile for my taste.

Edited by Photosbykev
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.