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Occasional Contributor
Posts: 9
Registered: ‎01-30-2021

Lens Warmer for Canon EF 24mm

Seeking guidance on a lens warmer for a canon EF 24mm f2.8 lens. The strip width would need to be approx 20mm and length about 22cm. Does such a thing exist, or can the community offer innovative solutions?

Warm Regards - James

Reputable Contributor
Posts: 597
Registered: ‎10-21-2016

Re: Lens Warmer for Canon EF 24mm

Probably best to seek advice in one the astrophotography forums. I know my son-in-law does astro and makes his own using old toaster elements with some sort of insulation that run off a 12 Volt supply but I don't have construction details.

VIP
Posts: 13,712
Registered: ‎12-07-2012

Re: Lens Warmer for Canon EF 24mm

This is called a "dew preventer".  You should find easy instructions on how to make one.  But the idea is very simple. Get six 25-ohm resistors. Wire them in series. They will produce 1 watt of heat when connected to a 12 volt power source. Now just fix them around the front of your lens.  We used to do this a lot and it works well.

EB
EOS 1DX and 1D Mk IV and several lenses!
Occasional Contributor
Posts: 9
Registered: ‎01-30-2021

Re: Lens Warmer for Canon EF 24mm

Thank you for your guidance, much appreciated.

Honored Contributor
Posts: 7,670
Registered: ‎11-13-2012

Re: Lens Warmer for Canon EF 24mm

$15-20 on Amazon. 

Higher priced ($30) Lens Muff uses hand warmers, non-electric. 

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, MX472, LR Classic
Occasional Contributor
Posts: 9
Registered: ‎01-30-2021

Re: Lens Warmer for Canon EF 24mm

Thanks, for the idea! I can build my own with 3/8" Velcro tape and a handwarmer. Inexpensive and easy solution to warming a pancake lens.
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