Results 1 to 12 of 12

Thread: Heater for Lens...

  1. #1
    Senior Member
    Join Date
    Feb 2003
    Location
    Outside the Dry Box.
    Posts
    16,268

    Default Heater for Lens...

    I'm on the verge of designing a portable dry lens case which is made of high shock absorbent material to protect the lens and also have a built in heater to heat up the area inside the bag to keep it dry...

    also have another idea is to heat up the front element which always fogged when moved from cold to warm area or vice versa... sometimes even during night when shooting...

    anybody got idea which is more useful? heater design i can make to any design i can think of... just that wondering how to secure the battery pack for the heater... or should i make a heater from the inside of the camera... hmmz...
    Logging Off. "You have 2,631 messages stored, of a total 400 allowed." don't PM me.

  2. #2

    Default

    You can try those pocket warmers that are reusable.
    http://www.canon.co.jp/Imaging/astro/pages_e/04_e.html

  3. #3

    Default

    I don't 100% understand what you said, but there is this thing known as 'chemical heat packet' that one can attach to the battery compartment of a camera. Purpose is to let the batteries stay warm when you shoot in the cold.

  4. #4
    Senior Member
    Join Date
    Feb 2003
    Location
    Outside the Dry Box.
    Posts
    16,268

    Default

    ah... i guess this will be good enough.. never thought of it before...

    or maybe i just go make 1 that can wrap around the front part of the lens will do...
    Logging Off. "You have 2,631 messages stored, of a total 400 allowed." don't PM me.

  5. #5
    Senior Member
    Join Date
    Feb 2003
    Location
    Outside the Dry Box.
    Posts
    16,268

    Default

    Quote Originally Posted by behyx
    I don't 100% understand what you said, but there is this thing known as 'chemical heat packet' that one can attach to the battery compartment of a camera. Purpose is to let the batteries stay warm when you shoot in the cold.
    actually i am more concerned with the fogging of the elements in the lens..
    Logging Off. "You have 2,631 messages stored, of a total 400 allowed." don't PM me.

  6. #6
    Senior Member
    Join Date
    Dec 2003
    Location
    Tampines
    Posts
    3,287

    Default

    Your idea is there but be aware that any heating element will consume a lot of juice so your power supply must be lasting which means it will be heavy. Anyway personally I don't think it is critical enough to really need it. Just my opinion.

  7. #7
    Senior Member
    Join Date
    Sep 2004
    Location
    Cons digger.
    Posts
    3,924

    Default

    you don't exactly need high temps.. so moderate temperature for sg climate is enough.. probably 2 x AA controlled by variable resistor to a length of heating element should be sufficient.. to conserve more battery and last longer, you can consider PWM-ing your supply to the heating element wires (tungsten would be ok)

    for the front element.. well.. mmm.. how to warm the front element only?
    “How fortunate for leaders that men do not think.” - Adolf Hitler

  8. #8

    Default

    yep, you can buy handwarmers in beach road market 2nd level. about $1.2 to $1.5 per packet. heating time about 8~12hours.

    but having said that, i find them not really that useful in keeping the cold out, as i've experienced beginning of the year in freezing Hokkaido. the lithium batteries still work as expected. also, if the camera is exposed to the cold for short periods and replaced back in the bag as soon as the shots are taken. it should not fog up the optics once the bagged camera is brought indoors.

    my 0.00001 cents worth.
    Quote Originally Posted by behyx
    I don't 100% understand what you said, but there is this thing known as 'chemical heat packet' that one can attach to the battery compartment of a camera. Purpose is to let the batteries stay warm when you shoot in the cold.

  9. #9
    Senior Member
    Join Date
    Feb 2003
    Location
    Outside the Dry Box.
    Posts
    16,268

    Default

    ya.. i also think b4... last time help dunno which poly with their design... also battery sucker, anyway that time still inexperience and they are maintaining a rather high temperature... now i got a better idea, since temperature low, den use for a long period (overnight or for few days...), can't disclose my 'idea' hehe...

    thanks for the ideas... i think i'll make a prototype for test...
    Logging Off. "You have 2,631 messages stored, of a total 400 allowed." don't PM me.

  10. #10
    Senior Member
    Join Date
    Dec 2003
    Location
    Tampines
    Posts
    3,287

    Default

    Ah entrepreneur at work. Gather up some investors lah.

  11. #11
    Senior Member
    Join Date
    Feb 2003
    Location
    Outside the Dry Box.
    Posts
    16,268

    Default

    Quote Originally Posted by jbma
    Ah entrepreneur at work. Gather up some investors lah.
    hmm should i make a heater that can produce warmer pictures? i really need more investors if i am into this project... hehehehehe
    Logging Off. "You have 2,631 messages stored, of a total 400 allowed." don't PM me.

  12. #12
    Senior Member
    Join Date
    Feb 2002
    Location
    Perth Australia
    Posts
    2,548

    Default

    Quote Originally Posted by Del_CtrlnoAlt
    also have another idea is to heat up the front element which always fogged when moved from cold to warm area or vice versa... sometimes even during night when shooting...

    anybody got idea which is more useful? heater design i can make to any design i can think of... just that wondering how to secure the battery pack for the heater... or should i make a heater from the inside of the camera... hmmz...
    Jim Kendrick (Canada) has been making heaters for lenses (telescopes) for years, and though they aren't specifically for camera lenses they work fine on cameras.

    There are a few good DIY Pulse Width Modulated (PWM) controller designs online if you wish to homebrew a solution.
    The Ang Moh from Hell
    Professional Photography - many are called, few are chosen!

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •